./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:20:47,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:20:47,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:20:47,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:20:47,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:20:47,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:20:47,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:20:47,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:20:47,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:20:47,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:20:47,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:20:47,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:20:47,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:20:47,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:20:47,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:20:47,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:20:47,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:20:47,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:20:47,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:20:47,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:20:47,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:20:47,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:20:47,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:20:47,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:20:47,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:20:47,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:20:47,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:20:47,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:20:47,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:20:47,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:20:47,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:20:47,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:20:47,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:20:47,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:20:47,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:20:47,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:20:47,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:20:47,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:20:47,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:20:47,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:20:47,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:20:47,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:20:47,715 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:20:47,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:20:47,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:20:47,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:20:47,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:20:47,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:20:47,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:20:47,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:20:47,718 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:20:47,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:20:47,719 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:20:47,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:20:47,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:20:47,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:20:47,720 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:20:47,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:20:47,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:20:47,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:20:47,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:20:47,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:20:47,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:20:47,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:20:47,723 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:20:47,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:20:47,723 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:20:47,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:20:48,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:20:48,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:20:48,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:20:48,065 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:20:48,065 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:20:48,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 20:20:49,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:20:49,561 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:20:49,561 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 20:20:49,569 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01928cd73/4b8f1e92e08e409bae0796823ff2bbe0/FLAG8c7aa171a [2023-08-30 20:20:49,584 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01928cd73/4b8f1e92e08e409bae0796823ff2bbe0 [2023-08-30 20:20:49,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:20:49,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:20:49,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:20:49,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:20:49,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:20:49,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49, skipping insertion in model container [2023-08-30 20:20:49,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:20:49,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:20:49,785 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-30 20:20:49,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:20:49,808 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:20:49,831 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-30 20:20:49,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:20:49,844 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:20:49,844 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:20:49,850 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:20:49,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49 WrapperNode [2023-08-30 20:20:49,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:20:49,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:20:49,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:20:49,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:20:49,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,888 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-08-30 20:20:49,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:20:49,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:20:49,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:20:49,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:20:49,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:20:49,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:20:49,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:20:49,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:20:49,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (1/1) ... [2023-08-30 20:20:49,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:20:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:20:49,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:20:49,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:20:49,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:20:49,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:20:49,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:20:49,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:20:49,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:20:49,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:20:49,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:20:49,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:20:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:20:49,997 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:20:50,072 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:20:50,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:20:50,216 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:20:50,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:20:50,253 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 20:20:50,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:20:50 BoogieIcfgContainer [2023-08-30 20:20:50,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:20:50,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:20:50,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:20:50,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:20:50,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:20:49" (1/3) ... [2023-08-30 20:20:50,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bfd8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:20:50, skipping insertion in model container [2023-08-30 20:20:50,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:20:49" (2/3) ... [2023-08-30 20:20:50,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bfd8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:20:50, skipping insertion in model container [2023-08-30 20:20:50,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:20:50" (3/3) ... [2023-08-30 20:20:50,262 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-30 20:20:50,269 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:20:50,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:20:50,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:20:50,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:20:50,367 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:20:50,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-08-30 20:20:50,443 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-08-30 20:20:50,444 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:20:50,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 20:20:50,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-08-30 20:20:50,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-08-30 20:20:50,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:20:50,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-30 20:20:50,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-30 20:20:50,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-08-30 20:20:50,490 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-08-30 20:20:50,490 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:20:50,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 20:20:50,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 20:20:52,576 INFO L134 LiptonReduction]: Checked pairs total: 559 [2023-08-30 20:20:52,576 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-30 20:20:52,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:20:52,603 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;@72c22876, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:20:52,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:20:52,613 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 20:20:52,614 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:20:52,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:52,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:52,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:52,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash -463799749, now seen corresponding path program 1 times [2023-08-30 20:20:52,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:52,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526840371] [2023-08-30 20:20:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526840371] [2023-08-30 20:20:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526840371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:53,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:53,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984584552] [2023-08-30 20:20:53,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:53,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:53,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:53,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:53,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:53,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:53,686 INFO L130 PetriNetUnfolder]: 62/126 cut-off events. [2023-08-30 20:20:53,686 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 20:20:53,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 62/126 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 14 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 200. Up to 63 conditions per place. [2023-08-30 20:20:53,688 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 32 selfloop transitions, 8 changer transitions 5/45 dead transitions. [2023-08-30 20:20:53,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 213 flow [2023-08-30 20:20:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 488 transitions. [2023-08-30 20:20:53,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-08-30 20:20:53,707 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 488 transitions. [2023-08-30 20:20:53,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 488 transitions. [2023-08-30 20:20:53,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:53,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 488 transitions. [2023-08-30 20:20:53,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:53,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:53,720 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:53,721 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 488 transitions. [2023-08-30 20:20:53,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 213 flow [2023-08-30 20:20:53,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:20:53,726 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 89 flow [2023-08-30 20:20:53,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=89, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-30 20:20:53,730 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-30 20:20:53,730 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 89 flow [2023-08-30 20:20:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:53,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:53,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:20:53,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:53,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1560515861, now seen corresponding path program 2 times [2023-08-30 20:20:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:53,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553196916] [2023-08-30 20:20:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553196916] [2023-08-30 20:20:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553196916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067446842] [2023-08-30 20:20:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:54,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:54,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:54,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:54,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:54,226 INFO L130 PetriNetUnfolder]: 63/131 cut-off events. [2023-08-30 20:20:54,226 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 20:20:54,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 131 events. 63/131 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 10 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-08-30 20:20:54,228 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 8 changer transitions 11/48 dead transitions. [2023-08-30 20:20:54,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 269 flow [2023-08-30 20:20:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2023-08-30 20:20:54,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567669172932331 [2023-08-30 20:20:54,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2023-08-30 20:20:54,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2023-08-30 20:20:54,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:54,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2023-08-30 20:20:54,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,240 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 89 flow. Second operand 7 states and 486 transitions. [2023-08-30 20:20:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 269 flow [2023-08-30 20:20:54,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 20:20:54,245 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 121 flow [2023-08-30 20:20:54,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-30 20:20:54,245 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-30 20:20:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 121 flow [2023-08-30 20:20:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:54,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:20:54,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:54,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2054408487, now seen corresponding path program 3 times [2023-08-30 20:20:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:54,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490055732] [2023-08-30 20:20:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:54,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:54,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490055732] [2023-08-30 20:20:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490055732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:54,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530295618] [2023-08-30 20:20:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:54,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:54,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:54,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:54,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:54,703 INFO L130 PetriNetUnfolder]: 66/144 cut-off events. [2023-08-30 20:20:54,703 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-30 20:20:54,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 144 events. 66/144 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 462 event pairs, 18 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 494. Up to 67 conditions per place. [2023-08-30 20:20:54,709 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 33 selfloop transitions, 11 changer transitions 8/52 dead transitions. [2023-08-30 20:20:54,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-08-30 20:20:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2023-08-30 20:20:54,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146616541353386 [2023-08-30 20:20:54,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2023-08-30 20:20:54,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2023-08-30 20:20:54,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:54,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2023-08-30 20:20:54,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,716 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,716 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 121 flow. Second operand 7 states and 491 transitions. [2023-08-30 20:20:54,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-08-30 20:20:54,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 304 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 20:20:54,721 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 165 flow [2023-08-30 20:20:54,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-30 20:20:54,723 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-08-30 20:20:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 165 flow [2023-08-30 20:20:54,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:54,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:54,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:20:54,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:54,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 485360883, now seen corresponding path program 4 times [2023-08-30 20:20:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351038808] [2023-08-30 20:20:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351038808] [2023-08-30 20:20:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351038808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957146080] [2023-08-30 20:20:54,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:55,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:55,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:55,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:55,168 INFO L130 PetriNetUnfolder]: 64/142 cut-off events. [2023-08-30 20:20:55,168 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-30 20:20:55,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 142 events. 64/142 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 event pairs, 12 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 506. Up to 67 conditions per place. [2023-08-30 20:20:55,169 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 12 changer transitions 5/53 dead transitions. [2023-08-30 20:20:55,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 367 flow [2023-08-30 20:20:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 490 transitions. [2023-08-30 20:20:55,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-08-30 20:20:55,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 490 transitions. [2023-08-30 20:20:55,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 490 transitions. [2023-08-30 20:20:55,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:55,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 490 transitions. [2023-08-30 20:20:55,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,176 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,176 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 165 flow. Second operand 7 states and 490 transitions. [2023-08-30 20:20:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 367 flow [2023-08-30 20:20:55,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 350 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 20:20:55,179 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-08-30 20:20:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-30 20:20:55,179 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-30 20:20:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-08-30 20:20:55,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:20:55,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:55,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2091229915, now seen corresponding path program 5 times [2023-08-30 20:20:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:55,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270347323] [2023-08-30 20:20:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:55,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:55,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270347323] [2023-08-30 20:20:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270347323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:55,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:55,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539930004] [2023-08-30 20:20:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:55,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:55,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:55,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:55,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:55,571 INFO L130 PetriNetUnfolder]: 63/135 cut-off events. [2023-08-30 20:20:55,571 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-08-30 20:20:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 135 events. 63/135 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 12 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 536. Up to 67 conditions per place. [2023-08-30 20:20:55,572 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 11 changer transitions 9/49 dead transitions. [2023-08-30 20:20:55,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 383 flow [2023-08-30 20:20:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 485 transitions. [2023-08-30 20:20:55,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558270676691729 [2023-08-30 20:20:55,576 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 485 transitions. [2023-08-30 20:20:55,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 485 transitions. [2023-08-30 20:20:55,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:55,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 485 transitions. [2023-08-30 20:20:55,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,581 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,581 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 7 states and 485 transitions. [2023-08-30 20:20:55,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 383 flow [2023-08-30 20:20:55,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:20:55,585 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 232 flow [2023-08-30 20:20:55,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-08-30 20:20:55,587 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-30 20:20:55,588 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 232 flow [2023-08-30 20:20:55,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:55,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:55,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:20:55,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:55,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2082114117, now seen corresponding path program 6 times [2023-08-30 20:20:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:55,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909082265] [2023-08-30 20:20:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:55,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:55,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909082265] [2023-08-30 20:20:55,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909082265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:20:55,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:20:55,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:20:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908796199] [2023-08-30 20:20:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:20:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:20:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:20:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:20:55,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-30 20:20:55,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:55,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-30 20:20:55,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:55,980 INFO L130 PetriNetUnfolder]: 59/121 cut-off events. [2023-08-30 20:20:55,980 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-08-30 20:20:55,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 121 events. 59/121 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 14 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 500. Up to 67 conditions per place. [2023-08-30 20:20:55,982 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 22 selfloop transitions, 11 changer transitions 12/45 dead transitions. [2023-08-30 20:20:55,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 379 flow [2023-08-30 20:20:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:20:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:20:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2023-08-30 20:20:55,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45206766917293234 [2023-08-30 20:20:55,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2023-08-30 20:20:55,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2023-08-30 20:20:55,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:55,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2023-08-30 20:20:55,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,989 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,989 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 232 flow. Second operand 7 states and 481 transitions. [2023-08-30 20:20:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 379 flow [2023-08-30 20:20:55,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 345 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-30 20:20:55,993 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 214 flow [2023-08-30 20:20:55,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-30 20:20:55,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-30 20:20:55,995 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 214 flow [2023-08-30 20:20:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:55,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:55,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 20:20:55,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:55,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2107689934, now seen corresponding path program 1 times [2023-08-30 20:20:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087508355] [2023-08-30 20:20:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087508355] [2023-08-30 20:20:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087508355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:20:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060700613] [2023-08-30 20:20:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:20:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:20:56,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:20:56,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:20:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:20:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:20:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:20:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060700613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:20:56,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:20:56,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:20:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331550189] [2023-08-30 20:20:56,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:20:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:20:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:20:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:20:56,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:20:56,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 214 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:56,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:56,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:20:56,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:57,663 INFO L130 PetriNetUnfolder]: 144/300 cut-off events. [2023-08-30 20:20:57,663 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-30 20:20:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 300 events. 144/300 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1256 event pairs, 4 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 911. Up to 89 conditions per place. [2023-08-30 20:20:57,665 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 70 selfloop transitions, 27 changer transitions 25/122 dead transitions. [2023-08-30 20:20:57,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 742 flow [2023-08-30 20:20:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:20:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:20:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1259 transitions. [2023-08-30 20:20:57,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359418282548476 [2023-08-30 20:20:57,671 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1259 transitions. [2023-08-30 20:20:57,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1259 transitions. [2023-08-30 20:20:57,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:57,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1259 transitions. [2023-08-30 20:20:57,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 19 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:57,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:57,678 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:57,678 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 214 flow. Second operand 19 states and 1259 transitions. [2023-08-30 20:20:57,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 742 flow [2023-08-30 20:20:57,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 122 transitions, 688 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-08-30 20:20:57,682 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 317 flow [2023-08-30 20:20:57,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-30 20:20:57,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-08-30 20:20:57,683 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 317 flow [2023-08-30 20:20:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:57,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:57,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:57,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:20:57,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:20:57,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:20:57,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:20:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -635034376, now seen corresponding path program 2 times [2023-08-30 20:20:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:20:57,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862441657] [2023-08-30 20:20:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:20:57,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:20:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:20:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:20:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862441657] [2023-08-30 20:20:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862441657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:20:58,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514964540] [2023-08-30 20:20:58,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:20:58,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:20:58,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:20:58,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:20:58,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:20:58,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:20:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:20:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:20:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:20:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:58,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:20:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:20:58,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514964540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:20:58,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:20:58,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:20:58,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980972240] [2023-08-30 20:20:58,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:20:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:20:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:20:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:20:58,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:20:58,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:20:58,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:58,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:20:58,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:20:58,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:59,832 INFO L130 PetriNetUnfolder]: 189/426 cut-off events. [2023-08-30 20:20:59,833 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-08-30 20:20:59,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 426 events. 189/426 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2146 event pairs, 10 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 1603. Up to 123 conditions per place. [2023-08-30 20:20:59,836 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 107 selfloop transitions, 53 changer transitions 20/180 dead transitions. [2023-08-30 20:20:59,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 1262 flow [2023-08-30 20:20:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 20:20:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 20:20:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2033 transitions. [2023-08-30 20:20:59,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-30 20:20:59,842 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2033 transitions. [2023-08-30 20:20:59,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2033 transitions. [2023-08-30 20:20:59,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:59,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2033 transitions. [2023-08-30 20:20:59,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.58064516129032) internal successors, (2033), 31 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:59,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:59,855 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:59,855 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 317 flow. Second operand 31 states and 2033 transitions. [2023-08-30 20:20:59,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 1262 flow [2023-08-30 20:20:59,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1092 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-08-30 20:20:59,861 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 586 flow [2023-08-30 20:20:59,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=586, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-08-30 20:20:59,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-08-30 20:20:59,862 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 586 flow [2023-08-30 20:20:59,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:59,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:20:59,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:20:59,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:00,068 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,SelfDestructingSolverStorable7 [2023-08-30 20:21:00,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:00,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash -708723856, now seen corresponding path program 3 times [2023-08-30 20:21:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473221380] [2023-08-30 20:21:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:00,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473221380] [2023-08-30 20:21:00,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473221380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786085322] [2023-08-30 20:21:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:00,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:00,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:21:00,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:21:00,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:00,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:00,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:00,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786085322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:00,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:00,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:00,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987037460] [2023-08-30 20:21:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:00,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:00,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:00,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:00,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 586 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:00,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:00,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:01,927 INFO L130 PetriNetUnfolder]: 185/397 cut-off events. [2023-08-30 20:21:01,927 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-08-30 20:21:01,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 397 events. 185/397 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 6 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1807. Up to 119 conditions per place. [2023-08-30 20:21:01,930 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 82 selfloop transitions, 43 changer transitions 33/158 dead transitions. [2023-08-30 20:21:01,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1256 flow [2023-08-30 20:21:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:21:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:21:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1709 transitions. [2023-08-30 20:21:01,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-08-30 20:21:01,938 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1709 transitions. [2023-08-30 20:21:01,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1709 transitions. [2023-08-30 20:21:01,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:01,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1709 transitions. [2023-08-30 20:21:01,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.73076923076923) internal successors, (1709), 26 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:01,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:01,950 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:01,951 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 586 flow. Second operand 26 states and 1709 transitions. [2023-08-30 20:21:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1256 flow [2023-08-30 20:21:01,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1137 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-30 20:21:01,962 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 564 flow [2023-08-30 20:21:01,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=564, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-08-30 20:21:01,963 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-08-30 20:21:01,963 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 564 flow [2023-08-30 20:21:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:01,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:01,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:01,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:02,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:02,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2082814152, now seen corresponding path program 4 times [2023-08-30 20:21:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:02,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366420200] [2023-08-30 20:21:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366420200] [2023-08-30 20:21:02,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366420200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637950214] [2023-08-30 20:21:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:21:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:02,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:21:02,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:21:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:02,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637950214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:02,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64644802] [2023-08-30 20:21:02,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:02,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:02,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 564 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:02,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:02,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:03,249 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2023-08-30 20:21:03,249 INFO L131 PetriNetUnfolder]: For 1783/1783 co-relation queries the response was YES. [2023-08-30 20:21:03,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 351 events. 168/351 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 4 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1659. Up to 155 conditions per place. [2023-08-30 20:21:03,254 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 54 selfloop transitions, 38 changer transitions 10/102 dead transitions. [2023-08-30 20:21:03,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 918 flow [2023-08-30 20:21:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:21:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:21:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 851 transitions. [2023-08-30 20:21:03,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430668016194332 [2023-08-30 20:21:03,257 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 851 transitions. [2023-08-30 20:21:03,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 851 transitions. [2023-08-30 20:21:03,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:03,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 851 transitions. [2023-08-30 20:21:03,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.46153846153847) internal successors, (851), 13 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:03,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:03,267 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:03,267 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 564 flow. Second operand 13 states and 851 transitions. [2023-08-30 20:21:03,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 918 flow [2023-08-30 20:21:03,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 801 flow, removed 16 selfloop flow, removed 19 redundant places. [2023-08-30 20:21:03,275 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 554 flow [2023-08-30 20:21:03,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2023-08-30 20:21:03,277 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-30 20:21:03,277 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 554 flow [2023-08-30 20:21:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:03,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:03,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:03,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:03,490 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:03,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 992131436, now seen corresponding path program 5 times [2023-08-30 20:21:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:03,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350853398] [2023-08-30 20:21:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:03,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350853398] [2023-08-30 20:21:03,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350853398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985443586] [2023-08-30 20:21:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:21:03,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:03,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:03,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:21:03,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:03,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:03,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:03,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:04,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985443586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:04,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:04,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360761782] [2023-08-30 20:21:04,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:04,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:04,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 554 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:04,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:04,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:04,453 INFO L130 PetriNetUnfolder]: 170/357 cut-off events. [2023-08-30 20:21:04,453 INFO L131 PetriNetUnfolder]: For 1289/1289 co-relation queries the response was YES. [2023-08-30 20:21:04,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 357 events. 170/357 cut-off events. For 1289/1289 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 5 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1584. Up to 195 conditions per place. [2023-08-30 20:21:04,461 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 60 selfloop transitions, 27 changer transitions 10/97 dead transitions. [2023-08-30 20:21:04,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 866 flow [2023-08-30 20:21:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:21:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:21:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2023-08-30 20:21:04,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2023-08-30 20:21:04,463 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 715 transitions. [2023-08-30 20:21:04,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 715 transitions. [2023-08-30 20:21:04,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:04,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 715 transitions. [2023-08-30 20:21:04,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.0) internal successors, (715), 11 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:04,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:04,467 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:04,467 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 554 flow. Second operand 11 states and 715 transitions. [2023-08-30 20:21:04,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 866 flow [2023-08-30 20:21:04,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 771 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-30 20:21:04,474 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 546 flow [2023-08-30 20:21:04,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-08-30 20:21:04,475 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-30 20:21:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 546 flow [2023-08-30 20:21:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:04,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:04,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:04,681 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,SelfDestructingSolverStorable10 [2023-08-30 20:21:04,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:04,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 209179710, now seen corresponding path program 6 times [2023-08-30 20:21:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:04,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819684166] [2023-08-30 20:21:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:04,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:04,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819684166] [2023-08-30 20:21:04,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819684166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:04,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242337615] [2023-08-30 20:21:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:21:04,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:04,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:04,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:21:04,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:21:04,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:04,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:05,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242337615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:05,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560655671] [2023-08-30 20:21:05,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:05,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:05,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 546 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:05,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:05,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:05,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:06,246 INFO L130 PetriNetUnfolder]: 208/476 cut-off events. [2023-08-30 20:21:06,246 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2023-08-30 20:21:06,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 476 events. 208/476 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2487 event pairs, 3 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2063. Up to 240 conditions per place. [2023-08-30 20:21:06,250 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 94 selfloop transitions, 45 changer transitions 16/155 dead transitions. [2023-08-30 20:21:06,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1263 flow [2023-08-30 20:21:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:21:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:21:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1432 transitions. [2023-08-30 20:21:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822966507177035 [2023-08-30 20:21:06,252 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1432 transitions. [2023-08-30 20:21:06,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1432 transitions. [2023-08-30 20:21:06,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:06,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1432 transitions. [2023-08-30 20:21:06,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:06,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:06,259 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:06,259 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 546 flow. Second operand 22 states and 1432 transitions. [2023-08-30 20:21:06,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1263 flow [2023-08-30 20:21:06,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1212 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-30 20:21:06,270 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 874 flow [2023-08-30 20:21:06,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=874, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2023-08-30 20:21:06,271 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-08-30 20:21:06,271 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 874 flow [2023-08-30 20:21:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:06,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:06,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:06,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 20:21:06,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:06,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:06,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash 135490230, now seen corresponding path program 7 times [2023-08-30 20:21:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625438576] [2023-08-30 20:21:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625438576] [2023-08-30 20:21:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625438576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126475222] [2023-08-30 20:21:06,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:21:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:06,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:21:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:06,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:06,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126475222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:07,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788570759] [2023-08-30 20:21:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:07,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:07,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 874 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:07,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:07,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:07,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:07,916 INFO L130 PetriNetUnfolder]: 203/442 cut-off events. [2023-08-30 20:21:07,916 INFO L131 PetriNetUnfolder]: For 2236/2236 co-relation queries the response was YES. [2023-08-30 20:21:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 442 events. 203/442 cut-off events. For 2236/2236 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2193 event pairs, 3 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 2196. Up to 236 conditions per place. [2023-08-30 20:21:07,920 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 71 selfloop transitions, 38 changer transitions 28/137 dead transitions. [2023-08-30 20:21:07,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1289 flow [2023-08-30 20:21:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:21:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:21:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-30 20:21:07,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-08-30 20:21:07,922 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-30 20:21:07,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-30 20:21:07,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:07,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-30 20:21:07,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:07,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:07,928 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:07,928 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 874 flow. Second operand 19 states and 1233 transitions. [2023-08-30 20:21:07,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1289 flow [2023-08-30 20:21:07,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1113 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-08-30 20:21:07,941 INFO L231 Difference]: Finished difference. Result has 122 places, 87 transitions, 782 flow [2023-08-30 20:21:07,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=87} [2023-08-30 20:21:07,941 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-08-30 20:21:07,942 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 87 transitions, 782 flow [2023-08-30 20:21:07,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:07,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:07,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:07,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:08,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:08,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:08,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1069243532, now seen corresponding path program 8 times [2023-08-30 20:21:08,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:08,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776797040] [2023-08-30 20:21:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:08,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:08,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776797040] [2023-08-30 20:21:08,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776797040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:08,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009820697] [2023-08-30 20:21:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:08,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:08,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:08,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:21:08,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:08,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:08,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009820697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:08,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:08,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-30 20:21:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637965843] [2023-08-30 20:21:08,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:08,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:08,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 87 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:08,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:08,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:08,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:09,219 INFO L130 PetriNetUnfolder]: 188/399 cut-off events. [2023-08-30 20:21:09,219 INFO L131 PetriNetUnfolder]: For 1561/1561 co-relation queries the response was YES. [2023-08-30 20:21:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 399 events. 188/399 cut-off events. For 1561/1561 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1837 event pairs, 9 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1896. Up to 214 conditions per place. [2023-08-30 20:21:09,222 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-08-30 20:21:09,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 1141 flow [2023-08-30 20:21:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:21:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:21:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 781 transitions. [2023-08-30 20:21:09,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281798245614035 [2023-08-30 20:21:09,225 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 781 transitions. [2023-08-30 20:21:09,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 781 transitions. [2023-08-30 20:21:09,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:09,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 781 transitions. [2023-08-30 20:21:09,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.08333333333333) internal successors, (781), 12 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:09,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:09,229 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:09,229 INFO L175 Difference]: Start difference. First operand has 122 places, 87 transitions, 782 flow. Second operand 12 states and 781 transitions. [2023-08-30 20:21:09,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 1141 flow [2023-08-30 20:21:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 1022 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-08-30 20:21:09,239 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 746 flow [2023-08-30 20:21:09,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-08-30 20:21:09,240 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-30 20:21:09,240 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 746 flow [2023-08-30 20:21:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:09,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:09,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:09,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:09,446 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,SelfDestructingSolverStorable13 [2023-08-30 20:21:09,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:09,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1595484335, now seen corresponding path program 9 times [2023-08-30 20:21:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276780805] [2023-08-30 20:21:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:09,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:09,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276780805] [2023-08-30 20:21:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276780805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:09,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574882202] [2023-08-30 20:21:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:09,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:09,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:09,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:21:09,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:21:09,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:09,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:09,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574882202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:10,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 20:21:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132798160] [2023-08-30 20:21:10,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:10,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:21:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:21:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:21:10,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:10,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 746 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:10,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:10,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:10,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:11,712 INFO L130 PetriNetUnfolder]: 298/649 cut-off events. [2023-08-30 20:21:11,712 INFO L131 PetriNetUnfolder]: For 2333/2333 co-relation queries the response was YES. [2023-08-30 20:21:11,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 649 events. 298/649 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3532 event pairs, 2 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 2820. Up to 182 conditions per place. [2023-08-30 20:21:11,719 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 145 selfloop transitions, 94 changer transitions 31/270 dead transitions. [2023-08-30 20:21:11,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 2195 flow [2023-08-30 20:21:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 20:21:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 20:21:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2501 transitions. [2023-08-30 20:21:11,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43299861495844877 [2023-08-30 20:21:11,723 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2501 transitions. [2023-08-30 20:21:11,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2501 transitions. [2023-08-30 20:21:11,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:11,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2501 transitions. [2023-08-30 20:21:11,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.8157894736842) internal successors, (2501), 38 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:11,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:11,742 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:11,742 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 746 flow. Second operand 38 states and 2501 transitions. [2023-08-30 20:21:11,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 2195 flow [2023-08-30 20:21:11,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 270 transitions, 2085 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-08-30 20:21:11,757 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1449 flow [2023-08-30 20:21:11,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1449, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-08-30 20:21:11,758 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-08-30 20:21:11,758 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1449 flow [2023-08-30 20:21:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:11,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:11,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:11,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:11,964 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,SelfDestructingSolverStorable14 [2023-08-30 20:21:11,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:11,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -749756410, now seen corresponding path program 1 times [2023-08-30 20:21:11,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:11,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821238499] [2023-08-30 20:21:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:11,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821238499] [2023-08-30 20:21:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821238499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442573255] [2023-08-30 20:21:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:12,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:12,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:12,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:12,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:21:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:12,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:12,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:12,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442573255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:12,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:12,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:21:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115129984] [2023-08-30 20:21:12,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:21:12,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:21:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:21:12,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:12,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1449 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:12,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:12,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:13,263 INFO L130 PetriNetUnfolder]: 427/905 cut-off events. [2023-08-30 20:21:13,264 INFO L131 PetriNetUnfolder]: For 4514/4514 co-relation queries the response was YES. [2023-08-30 20:21:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 905 events. 427/905 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5277 event pairs, 10 based on Foata normal form. 5/908 useless extension candidates. Maximal degree in co-relation 4436. Up to 237 conditions per place. [2023-08-30 20:21:13,272 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 164 selfloop transitions, 68 changer transitions 17/249 dead transitions. [2023-08-30 20:21:13,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 249 transitions, 2712 flow [2023-08-30 20:21:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:21:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:21:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1139 transitions. [2023-08-30 20:21:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-08-30 20:21:13,277 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1139 transitions. [2023-08-30 20:21:13,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1139 transitions. [2023-08-30 20:21:13,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:13,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1139 transitions. [2023-08-30 20:21:13,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.0) internal successors, (1139), 17 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:13,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:13,284 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:13,284 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1449 flow. Second operand 17 states and 1139 transitions. [2023-08-30 20:21:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 249 transitions, 2712 flow [2023-08-30 20:21:13,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2279 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-08-30 20:21:13,316 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1585 flow [2023-08-30 20:21:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-08-30 20:21:13,317 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-08-30 20:21:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1585 flow [2023-08-30 20:21:13,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:13,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:13,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:13,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:13,523 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,SelfDestructingSolverStorable15 [2023-08-30 20:21:13,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:13,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash 976032698, now seen corresponding path program 2 times [2023-08-30 20:21:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475096396] [2023-08-30 20:21:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:13,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475096396] [2023-08-30 20:21:13,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475096396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803656165] [2023-08-30 20:21:13,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:13,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:13,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:21:13,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:21:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:13,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803656165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:13,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:13,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:21:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143314749] [2023-08-30 20:21:13,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:13,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:21:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:21:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:21:14,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:14,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:14,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:14,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:14,680 INFO L130 PetriNetUnfolder]: 411/855 cut-off events. [2023-08-30 20:21:14,680 INFO L131 PetriNetUnfolder]: For 3772/3772 co-relation queries the response was YES. [2023-08-30 20:21:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 855 events. 411/855 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4799 event pairs, 10 based on Foata normal form. 5/860 useless extension candidates. Maximal degree in co-relation 4149. Up to 217 conditions per place. [2023-08-30 20:21:14,686 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 60 changer transitions 40/239 dead transitions. [2023-08-30 20:21:14,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2513 flow [2023-08-30 20:21:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:21:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:21:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1251 transitions. [2023-08-30 20:21:14,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317174515235457 [2023-08-30 20:21:14,688 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1251 transitions. [2023-08-30 20:21:14,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1251 transitions. [2023-08-30 20:21:14,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:14,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1251 transitions. [2023-08-30 20:21:14,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.84210526315789) internal successors, (1251), 19 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:14,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:14,693 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:14,694 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1585 flow. Second operand 19 states and 1251 transitions. [2023-08-30 20:21:14,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2513 flow [2023-08-30 20:21:14,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2420 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-30 20:21:14,721 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1473 flow [2023-08-30 20:21:14,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2023-08-30 20:21:14,721 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-08-30 20:21:14,721 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1473 flow [2023-08-30 20:21:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:14,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:14,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:14,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:14,927 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,SelfDestructingSolverStorable16 [2023-08-30 20:21:14,928 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:14,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1591276241, now seen corresponding path program 10 times [2023-08-30 20:21:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:14,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108218187] [2023-08-30 20:21:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:15,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:15,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108218187] [2023-08-30 20:21:15,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108218187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:15,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858964645] [2023-08-30 20:21:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:21:15,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:15,095 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:15,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:21:15,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:21:15,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:15,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:15,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858964645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:15,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-30 20:21:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706549097] [2023-08-30 20:21:15,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:21:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:21:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:21:15,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:15,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1473 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:15,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:15,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:15,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:16,801 INFO L130 PetriNetUnfolder]: 334/717 cut-off events. [2023-08-30 20:21:16,802 INFO L131 PetriNetUnfolder]: For 3992/3992 co-relation queries the response was YES. [2023-08-30 20:21:16,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 717 events. 334/717 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3975 event pairs, 2 based on Foata normal form. 4/721 useless extension candidates. Maximal degree in co-relation 3542. Up to 274 conditions per place. [2023-08-30 20:21:16,807 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 112 selfloop transitions, 78 changer transitions 24/214 dead transitions. [2023-08-30 20:21:16,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 214 transitions, 2109 flow [2023-08-30 20:21:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:21:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:21:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1768 transitions. [2023-08-30 20:21:16,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-08-30 20:21:16,810 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1768 transitions. [2023-08-30 20:21:16,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1768 transitions. [2023-08-30 20:21:16,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:16,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1768 transitions. [2023-08-30 20:21:16,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.48148148148148) internal successors, (1768), 27 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:16,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:16,817 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:16,818 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1473 flow. Second operand 27 states and 1768 transitions. [2023-08-30 20:21:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 214 transitions, 2109 flow [2023-08-30 20:21:16,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 1933 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-08-30 20:21:16,841 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1439 flow [2023-08-30 20:21:16,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1439, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2023-08-30 20:21:16,841 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-30 20:21:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1439 flow [2023-08-30 20:21:16,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:16,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:16,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:16,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 20:21:17,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:17,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash 716408728, now seen corresponding path program 11 times [2023-08-30 20:21:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:17,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893196112] [2023-08-30 20:21:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:17,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893196112] [2023-08-30 20:21:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893196112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933678334] [2023-08-30 20:21:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:21:17,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:17,259 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:17,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:21:17,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:21:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:17,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933678334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:17,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157594635] [2023-08-30 20:21:17,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:17,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:18,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:18,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:18,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:18,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:18,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:20,304 INFO L130 PetriNetUnfolder]: 603/1334 cut-off events. [2023-08-30 20:21:20,304 INFO L131 PetriNetUnfolder]: For 8809/8809 co-relation queries the response was YES. [2023-08-30 20:21:20,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1334 events. 603/1334 cut-off events. For 8809/8809 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8815 event pairs, 6 based on Foata normal form. 8/1342 useless extension candidates. Maximal degree in co-relation 7085. Up to 373 conditions per place. [2023-08-30 20:21:20,314 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 254 selfloop transitions, 179 changer transitions 41/474 dead transitions. [2023-08-30 20:21:20,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 474 transitions, 4798 flow [2023-08-30 20:21:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-30 20:21:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-30 20:21:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4326 transitions. [2023-08-30 20:21:20,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312200956937799 [2023-08-30 20:21:20,321 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4326 transitions. [2023-08-30 20:21:20,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4326 transitions. [2023-08-30 20:21:20,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:20,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4326 transitions. [2023-08-30 20:21:20,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 65.54545454545455) internal successors, (4326), 66 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:20,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:20,336 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:20,337 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1439 flow. Second operand 66 states and 4326 transitions. [2023-08-30 20:21:20,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 474 transitions, 4798 flow [2023-08-30 20:21:20,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 474 transitions, 4165 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-08-30 20:21:20,406 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2985 flow [2023-08-30 20:21:20,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2985, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2023-08-30 20:21:20,407 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-30 20:21:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2985 flow [2023-08-30 20:21:20,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:20,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:20,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:20,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:20,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:20,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1336338705, now seen corresponding path program 3 times [2023-08-30 20:21:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:20,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389163320] [2023-08-30 20:21:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:20,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389163320] [2023-08-30 20:21:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389163320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431835796] [2023-08-30 20:21:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:20,751 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:20,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:21:20,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:21:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:20,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:21,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431835796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:21,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:21,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-30 20:21:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799522653] [2023-08-30 20:21:21,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:21,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:21:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:21:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:21:21,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:21,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2985 flow. Second operand has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:21,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:21,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:21,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:21,724 INFO L130 PetriNetUnfolder]: 625/1370 cut-off events. [2023-08-30 20:21:21,724 INFO L131 PetriNetUnfolder]: For 14056/14056 co-relation queries the response was YES. [2023-08-30 20:21:21,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1370 events. 625/1370 cut-off events. For 14056/14056 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9032 event pairs, 24 based on Foata normal form. 10/1376 useless extension candidates. Maximal degree in co-relation 7761. Up to 583 conditions per place. [2023-08-30 20:21:21,735 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 182 selfloop transitions, 83 changer transitions 44/309 dead transitions. [2023-08-30 20:21:21,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 3955 flow [2023-08-30 20:21:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:21:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:21:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1125 transitions. [2023-08-30 20:21:21,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537151702786375 [2023-08-30 20:21:21,737 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1125 transitions. [2023-08-30 20:21:21,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1125 transitions. [2023-08-30 20:21:21,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:21,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1125 transitions. [2023-08-30 20:21:21,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.17647058823529) internal successors, (1125), 17 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) [2023-08-30 20:21:21,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:21,741 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:21,741 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2985 flow. Second operand 17 states and 1125 transitions. [2023-08-30 20:21:21,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 3955 flow [2023-08-30 20:21:21,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 309 transitions, 3131 flow, removed 297 selfloop flow, removed 33 redundant places. [2023-08-30 20:21:21,879 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2394 flow [2023-08-30 20:21:21,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2394, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2023-08-30 20:21:21,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-08-30 20:21:21,881 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2394 flow [2023-08-30 20:21:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:21,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:21,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:21,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 20:21:22,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:22,088 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:22,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 644016598, now seen corresponding path program 12 times [2023-08-30 20:21:22,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:22,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276404729] [2023-08-30 20:21:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276404729] [2023-08-30 20:21:22,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276404729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:22,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961095145] [2023-08-30 20:21:22,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:21:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:22,294 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:22,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:21:22,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:21:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:22,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961095145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:22,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:22,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:22,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168459558] [2023-08-30 20:21:22,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:22,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:23,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:23,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2394 flow. Second operand has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:23,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:23,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:23,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:24,870 INFO L130 PetriNetUnfolder]: 574/1252 cut-off events. [2023-08-30 20:21:24,870 INFO L131 PetriNetUnfolder]: For 10627/10627 co-relation queries the response was YES. [2023-08-30 20:21:24,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1252 events. 574/1252 cut-off events. For 10627/10627 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8099 event pairs, 6 based on Foata normal form. 9/1257 useless extension candidates. Maximal degree in co-relation 6396. Up to 299 conditions per place. [2023-08-30 20:21:24,878 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 219 selfloop transitions, 154 changer transitions 42/415 dead transitions. [2023-08-30 20:21:24,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 4204 flow [2023-08-30 20:21:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-30 20:21:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-30 20:21:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3418 transitions. [2023-08-30 20:21:24,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-08-30 20:21:24,884 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3418 transitions. [2023-08-30 20:21:24,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3418 transitions. [2023-08-30 20:21:24,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:24,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3418 transitions. [2023-08-30 20:21:24,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.73076923076923) internal successors, (3418), 52 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:24,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:24,896 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:24,896 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2394 flow. Second operand 52 states and 3418 transitions. [2023-08-30 20:21:24,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 4204 flow [2023-08-30 20:21:24,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 415 transitions, 3734 flow, removed 114 selfloop flow, removed 22 redundant places. [2023-08-30 20:21:24,958 INFO L231 Difference]: Finished difference. Result has 232 places, 236 transitions, 2576 flow [2023-08-30 20:21:24,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2576, PETRI_PLACES=232, PETRI_TRANSITIONS=236} [2023-08-30 20:21:24,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-08-30 20:21:24,959 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 236 transitions, 2576 flow [2023-08-30 20:21:24,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:24,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:24,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:24,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:25,165 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:25,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash -677900520, now seen corresponding path program 13 times [2023-08-30 20:21:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024663300] [2023-08-30 20:21:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:25,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024663300] [2023-08-30 20:21:25,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024663300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591707229] [2023-08-30 20:21:25,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:21:25,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:25,365 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:25,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:21:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:25,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:25,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591707229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:25,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:25,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830641549] [2023-08-30 20:21:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:25,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:26,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:26,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 236 transitions, 2576 flow. Second operand has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:26,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:26,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:26,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:26,772 INFO L130 PetriNetUnfolder]: 552/1188 cut-off events. [2023-08-30 20:21:26,772 INFO L131 PetriNetUnfolder]: For 8278/8278 co-relation queries the response was YES. [2023-08-30 20:21:26,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 1188 events. 552/1188 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7464 event pairs, 10 based on Foata normal form. 3/1187 useless extension candidates. Maximal degree in co-relation 6208. Up to 307 conditions per place. [2023-08-30 20:21:26,778 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 145 selfloop transitions, 141 changer transitions 36/322 dead transitions. [2023-08-30 20:21:26,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 3658 flow [2023-08-30 20:21:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 20:21:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 20:21:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1523 transitions. [2023-08-30 20:21:26,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43564073226544625 [2023-08-30 20:21:26,781 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1523 transitions. [2023-08-30 20:21:26,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1523 transitions. [2023-08-30 20:21:26,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:26,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1523 transitions. [2023-08-30 20:21:26,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 66.21739130434783) internal successors, (1523), 23 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:26,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:26,786 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:26,786 INFO L175 Difference]: Start difference. First operand has 232 places, 236 transitions, 2576 flow. Second operand 23 states and 1523 transitions. [2023-08-30 20:21:26,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 3658 flow [2023-08-30 20:21:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 322 transitions, 3333 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-08-30 20:21:26,835 INFO L231 Difference]: Finished difference. Result has 217 places, 233 transitions, 2639 flow [2023-08-30 20:21:26,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2639, PETRI_PLACES=217, PETRI_TRANSITIONS=233} [2023-08-30 20:21:26,836 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-30 20:21:26,836 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 233 transitions, 2639 flow [2023-08-30 20:21:26,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:26,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:26,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:26,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:27,041 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,SelfDestructingSolverStorable21 [2023-08-30 20:21:27,042 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:27,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 948168439, now seen corresponding path program 4 times [2023-08-30 20:21:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:27,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161512669] [2023-08-30 20:21:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:27,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:27,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161512669] [2023-08-30 20:21:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161512669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187876408] [2023-08-30 20:21:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:21:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:27,172 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:27,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:21:27,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:21:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:27,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:27,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187876408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:27,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:27,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225797047] [2023-08-30 20:21:27,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:27,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:27,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:27,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 233 transitions, 2639 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:27,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:27,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:27,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:28,200 INFO L130 PetriNetUnfolder]: 532/1147 cut-off events. [2023-08-30 20:21:28,201 INFO L131 PetriNetUnfolder]: For 8132/8132 co-relation queries the response was YES. [2023-08-30 20:21:28,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1147 events. 532/1147 cut-off events. For 8132/8132 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7147 event pairs, 10 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 5956. Up to 341 conditions per place. [2023-08-30 20:21:28,206 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 173 selfloop transitions, 90 changer transitions 50/313 dead transitions. [2023-08-30 20:21:28,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3653 flow [2023-08-30 20:21:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:21:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:21:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1383 transitions. [2023-08-30 20:21:28,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332706766917293 [2023-08-30 20:21:28,208 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1383 transitions. [2023-08-30 20:21:28,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1383 transitions. [2023-08-30 20:21:28,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:28,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1383 transitions. [2023-08-30 20:21:28,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.85714285714286) internal successors, (1383), 21 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) [2023-08-30 20:21:28,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:28,211 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:28,211 INFO L175 Difference]: Start difference. First operand has 217 places, 233 transitions, 2639 flow. Second operand 21 states and 1383 transitions. [2023-08-30 20:21:28,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3653 flow [2023-08-30 20:21:28,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 313 transitions, 3319 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-08-30 20:21:28,245 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2336 flow [2023-08-30 20:21:28,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2336, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2023-08-30 20:21:28,246 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-08-30 20:21:28,246 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2336 flow [2023-08-30 20:21:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:28,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:28,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:28,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:28,447 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:28,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -731371048, now seen corresponding path program 14 times [2023-08-30 20:21:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93330884] [2023-08-30 20:21:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:28,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:28,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93330884] [2023-08-30 20:21:28,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93330884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:28,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859646516] [2023-08-30 20:21:28,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:28,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:28,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:28,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:21:28,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:28,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:28,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:29,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859646516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:29,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:29,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:29,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405764472] [2023-08-30 20:21:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:29,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:29,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2336 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:29,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:29,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:29,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:30,456 INFO L130 PetriNetUnfolder]: 573/1253 cut-off events. [2023-08-30 20:21:30,456 INFO L131 PetriNetUnfolder]: For 9713/9713 co-relation queries the response was YES. [2023-08-30 20:21:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1253 events. 573/1253 cut-off events. For 9713/9713 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8092 event pairs, 6 based on Foata normal form. 13/1262 useless extension candidates. Maximal degree in co-relation 6613. Up to 343 conditions per place. [2023-08-30 20:21:30,462 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 144 changer transitions 94/377 dead transitions. [2023-08-30 20:21:30,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 4416 flow [2023-08-30 20:21:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 20:21:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 20:21:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2525 transitions. [2023-08-30 20:21:30,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425944669365722 [2023-08-30 20:21:30,468 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2525 transitions. [2023-08-30 20:21:30,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2525 transitions. [2023-08-30 20:21:30,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:30,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2525 transitions. [2023-08-30 20:21:30,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 64.74358974358974) internal successors, (2525), 39 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:30,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:30,476 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:30,476 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2336 flow. Second operand 39 states and 2525 transitions. [2023-08-30 20:21:30,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 4416 flow [2023-08-30 20:21:30,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 377 transitions, 4066 flow, removed 60 selfloop flow, removed 26 redundant places. [2023-08-30 20:21:30,531 INFO L231 Difference]: Finished difference. Result has 228 places, 211 transitions, 2624 flow [2023-08-30 20:21:30,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2624, PETRI_PLACES=228, PETRI_TRANSITIONS=211} [2023-08-30 20:21:30,531 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-08-30 20:21:30,532 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 211 transitions, 2624 flow [2023-08-30 20:21:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:30,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:30,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:30,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:30,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:30,738 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:30,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:30,738 INFO L85 PathProgramCache]: Analyzing trace with hash 767361305, now seen corresponding path program 5 times [2023-08-30 20:21:30,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:30,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454649963] [2023-08-30 20:21:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454649963] [2023-08-30 20:21:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454649963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494693403] [2023-08-30 20:21:30,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:21:30,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:30,910 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:30,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:21:30,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:21:30,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:31,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:31,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494693403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:31,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:31,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200722488] [2023-08-30 20:21:31,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:31,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:31,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:31,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 211 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:31,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:31,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:32,133 INFO L130 PetriNetUnfolder]: 488/1033 cut-off events. [2023-08-30 20:21:32,133 INFO L131 PetriNetUnfolder]: For 8940/8940 co-relation queries the response was YES. [2023-08-30 20:21:32,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1033 events. 488/1033 cut-off events. For 8940/8940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 12 based on Foata normal form. 14/1047 useless extension candidates. Maximal degree in co-relation 5861. Up to 307 conditions per place. [2023-08-30 20:21:32,140 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 172 selfloop transitions, 102 changer transitions 33/307 dead transitions. [2023-08-30 20:21:32,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4032 flow [2023-08-30 20:21:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 20:21:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 20:21:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1571 transitions. [2023-08-30 20:21:32,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064692982456143 [2023-08-30 20:21:32,147 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1571 transitions. [2023-08-30 20:21:32,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1571 transitions. [2023-08-30 20:21:32,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:32,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1571 transitions. [2023-08-30 20:21:32,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,155 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,156 INFO L175 Difference]: Start difference. First operand has 228 places, 211 transitions, 2624 flow. Second operand 24 states and 1571 transitions. [2023-08-30 20:21:32,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4032 flow [2023-08-30 20:21:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3591 flow, removed 146 selfloop flow, removed 32 redundant places. [2023-08-30 20:21:32,204 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2510 flow [2023-08-30 20:21:32,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2510, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2023-08-30 20:21:32,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-08-30 20:21:32,205 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2510 flow [2023-08-30 20:21:32,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:32,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:32,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:32,411 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:32,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1622667959, now seen corresponding path program 6 times [2023-08-30 20:21:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093581977] [2023-08-30 20:21:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093581977] [2023-08-30 20:21:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093581977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196848948] [2023-08-30 20:21:32,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:21:32,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:32,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:32,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:32,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:21:32,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:21:32,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:32,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:32,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196848948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:32,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031882428] [2023-08-30 20:21:32,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:32,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:32,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2510 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:32,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:32,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:32,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:33,507 INFO L130 PetriNetUnfolder]: 506/1046 cut-off events. [2023-08-30 20:21:33,507 INFO L131 PetriNetUnfolder]: For 7465/7465 co-relation queries the response was YES. [2023-08-30 20:21:33,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1046 events. 506/1046 cut-off events. For 7465/7465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6101 event pairs, 8 based on Foata normal form. 5/1051 useless extension candidates. Maximal degree in co-relation 5735. Up to 329 conditions per place. [2023-08-30 20:21:33,512 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 183 selfloop transitions, 111 changer transitions 17/311 dead transitions. [2023-08-30 20:21:33,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 3841 flow [2023-08-30 20:21:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:21:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:21:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1258 transitions. [2023-08-30 20:21:33,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435595567867036 [2023-08-30 20:21:33,518 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1258 transitions. [2023-08-30 20:21:33,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1258 transitions. [2023-08-30 20:21:33,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:33,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1258 transitions. [2023-08-30 20:21:33,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.21052631578948) internal successors, (1258), 19 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:33,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:33,523 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:33,523 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2510 flow. Second operand 19 states and 1258 transitions. [2023-08-30 20:21:33,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 3841 flow [2023-08-30 20:21:33,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 3616 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-08-30 20:21:33,566 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2941 flow [2023-08-30 20:21:33,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2941, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2023-08-30 20:21:33,567 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-30 20:21:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2941 flow [2023-08-30 20:21:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:33,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:33,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:33,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:33,773 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,SelfDestructingSolverStorable25 [2023-08-30 20:21:33,773 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:33,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1548978479, now seen corresponding path program 7 times [2023-08-30 20:21:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:33,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062132716] [2023-08-30 20:21:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062132716] [2023-08-30 20:21:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062132716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632558518] [2023-08-30 20:21:33,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:21:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:33,914 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:33,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:21:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:34,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:34,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632558518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:34,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549823108] [2023-08-30 20:21:34,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:34,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:34,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2941 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:34,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:34,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:34,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:34,928 INFO L130 PetriNetUnfolder]: 499/1021 cut-off events. [2023-08-30 20:21:34,928 INFO L131 PetriNetUnfolder]: For 7989/7989 co-relation queries the response was YES. [2023-08-30 20:21:34,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1021 events. 499/1021 cut-off events. For 7989/7989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5885 event pairs, 8 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5845. Up to 329 conditions per place. [2023-08-30 20:21:34,934 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 178 selfloop transitions, 101 changer transitions 19/298 dead transitions. [2023-08-30 20:21:34,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3838 flow [2023-08-30 20:21:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:21:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:21:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1246 transitions. [2023-08-30 20:21:34,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314404432132964 [2023-08-30 20:21:34,938 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1246 transitions. [2023-08-30 20:21:34,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1246 transitions. [2023-08-30 20:21:34,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:34,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1246 transitions. [2023-08-30 20:21:34,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.57894736842105) internal successors, (1246), 19 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:34,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:34,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:34,943 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2941 flow. Second operand 19 states and 1246 transitions. [2023-08-30 20:21:34,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3838 flow [2023-08-30 20:21:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3706 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-08-30 20:21:34,993 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3009 flow [2023-08-30 20:21:34,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3009, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2023-08-30 20:21:34,993 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-08-30 20:21:34,994 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3009 flow [2023-08-30 20:21:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:35,199 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,SelfDestructingSolverStorable26 [2023-08-30 20:21:35,199 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:35,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 240012320, now seen corresponding path program 15 times [2023-08-30 20:21:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:35,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527431449] [2023-08-30 20:21:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527431449] [2023-08-30 20:21:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527431449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228709014] [2023-08-30 20:21:35,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:35,353 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) [2023-08-30 20:21:35,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:21:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:21:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:35,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228709014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:35,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085314580] [2023-08-30 20:21:35,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:35,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:35,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:36,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:36,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3009 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:36,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:36,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:36,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:37,243 INFO L130 PetriNetUnfolder]: 558/1144 cut-off events. [2023-08-30 20:21:37,243 INFO L131 PetriNetUnfolder]: For 9340/9340 co-relation queries the response was YES. [2023-08-30 20:21:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1144 events. 558/1144 cut-off events. For 9340/9340 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6777 event pairs, 3 based on Foata normal form. 5/1149 useless extension candidates. Maximal degree in co-relation 6693. Up to 561 conditions per place. [2023-08-30 20:21:37,250 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 231 selfloop transitions, 85 changer transitions 51/367 dead transitions. [2023-08-30 20:21:37,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 367 transitions, 4711 flow [2023-08-30 20:21:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:21:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:21:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2386 transitions. [2023-08-30 20:21:37,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42425320056899 [2023-08-30 20:21:37,259 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2386 transitions. [2023-08-30 20:21:37,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2386 transitions. [2023-08-30 20:21:37,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:37,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2386 transitions. [2023-08-30 20:21:37,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.48648648648648) internal successors, (2386), 37 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:37,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:37,266 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3009 flow. Second operand 37 states and 2386 transitions. [2023-08-30 20:21:37,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 367 transitions, 4711 flow [2023-08-30 20:21:37,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 367 transitions, 4424 flow, removed 49 selfloop flow, removed 17 redundant places. [2023-08-30 20:21:37,326 INFO L231 Difference]: Finished difference. Result has 227 places, 258 transitions, 3410 flow [2023-08-30 20:21:37,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3410, PETRI_PLACES=227, PETRI_TRANSITIONS=258} [2023-08-30 20:21:37,331 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-08-30 20:21:37,331 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 258 transitions, 3410 flow [2023-08-30 20:21:37,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:37,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:37,332 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:37,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:37,537 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,SelfDestructingSolverStorable27 [2023-08-30 20:21:37,538 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:37,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2011172568, now seen corresponding path program 16 times [2023-08-30 20:21:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:37,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292266452] [2023-08-30 20:21:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:37,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:37,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292266452] [2023-08-30 20:21:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292266452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:37,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415763017] [2023-08-30 20:21:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:21:37,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:37,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:37,704 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) [2023-08-30 20:21:37,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:21:37,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:21:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:37,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415763017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:38,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077294662] [2023-08-30 20:21:38,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:38,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:38,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 258 transitions, 3410 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:38,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:38,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:38,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:38,729 INFO L130 PetriNetUnfolder]: 521/1041 cut-off events. [2023-08-30 20:21:38,729 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-08-30 20:21:38,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 1041 events. 521/1041 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5865 event pairs, 7 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 6397. Up to 693 conditions per place. [2023-08-30 20:21:38,754 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 216 selfloop transitions, 46 changer transitions 30/292 dead transitions. [2023-08-30 20:21:38,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 4160 flow [2023-08-30 20:21:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:21:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:21:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 963 transitions. [2023-08-30 20:21:38,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236842105263156 [2023-08-30 20:21:38,756 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 963 transitions. [2023-08-30 20:21:38,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 963 transitions. [2023-08-30 20:21:38,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:38,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 963 transitions. [2023-08-30 20:21:38,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 64.2) internal successors, (963), 15 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:38,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:38,760 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:38,760 INFO L175 Difference]: Start difference. First operand has 227 places, 258 transitions, 3410 flow. Second operand 15 states and 963 transitions. [2023-08-30 20:21:38,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 4160 flow [2023-08-30 20:21:38,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3690 flow, removed 164 selfloop flow, removed 21 redundant places. [2023-08-30 20:21:38,816 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 3010 flow [2023-08-30 20:21:38,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3010, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2023-08-30 20:21:38,818 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-08-30 20:21:38,818 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 3010 flow [2023-08-30 20:21:38,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:38,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:38,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:38,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:39,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:39,024 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:39,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1960378635, now seen corresponding path program 8 times [2023-08-30 20:21:39,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:39,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718235672] [2023-08-30 20:21:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:39,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:39,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718235672] [2023-08-30 20:21:39,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718235672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:39,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640965436] [2023-08-30 20:21:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:39,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:39,164 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) [2023-08-30 20:21:39,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:21:39,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:39,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:39,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640965436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:39,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319281325] [2023-08-30 20:21:39,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:39,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:39,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 3010 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:39,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:39,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:39,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:40,123 INFO L130 PetriNetUnfolder]: 511/1007 cut-off events. [2023-08-30 20:21:40,123 INFO L131 PetriNetUnfolder]: For 8066/8066 co-relation queries the response was YES. [2023-08-30 20:21:40,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5805 conditions, 1007 events. 511/1007 cut-off events. For 8066/8066 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5546 event pairs, 9 based on Foata normal form. 9/1016 useless extension candidates. Maximal degree in co-relation 5752. Up to 657 conditions per place. [2023-08-30 20:21:40,128 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 236 selfloop transitions, 31 changer transitions 41/308 dead transitions. [2023-08-30 20:21:40,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 308 transitions, 3877 flow [2023-08-30 20:21:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:21:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:21:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-30 20:21:40,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-08-30 20:21:40,130 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-30 20:21:40,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-30 20:21:40,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:40,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-30 20:21:40,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:40,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:40,134 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:40,134 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 3010 flow. Second operand 19 states and 1233 transitions. [2023-08-30 20:21:40,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 308 transitions, 3877 flow [2023-08-30 20:21:40,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3653 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-08-30 20:21:40,173 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2722 flow [2023-08-30 20:21:40,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2722, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2023-08-30 20:21:40,174 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-30 20:21:40,174 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2722 flow [2023-08-30 20:21:40,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:40,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:40,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:40,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 20:21:40,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:40,375 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:40,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash 280573377, now seen corresponding path program 9 times [2023-08-30 20:21:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695774684] [2023-08-30 20:21:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:40,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695774684] [2023-08-30 20:21:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695774684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165955074] [2023-08-30 20:21:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:21:40,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:40,506 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) [2023-08-30 20:21:40,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:21:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:21:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 20:21:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:40,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165955074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:40,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-30 20:21:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029886105] [2023-08-30 20:21:40,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:40,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2722 flow. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:40,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:40,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:40,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:41,514 INFO L130 PetriNetUnfolder]: 463/959 cut-off events. [2023-08-30 20:21:41,514 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-08-30 20:21:41,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 959 events. 463/959 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5503 event pairs, 7 based on Foata normal form. 7/964 useless extension candidates. Maximal degree in co-relation 5237. Up to 657 conditions per place. [2023-08-30 20:21:41,519 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 248 selfloop transitions, 28 changer transitions 18/294 dead transitions. [2023-08-30 20:21:41,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 294 transitions, 3593 flow [2023-08-30 20:21:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:21:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:21:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1108 transitions. [2023-08-30 20:21:41,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42879256965944273 [2023-08-30 20:21:41,521 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1108 transitions. [2023-08-30 20:21:41,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1108 transitions. [2023-08-30 20:21:41,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:41,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1108 transitions. [2023-08-30 20:21:41,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:41,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:41,524 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:41,525 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2722 flow. Second operand 17 states and 1108 transitions. [2023-08-30 20:21:41,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 294 transitions, 3593 flow [2023-08-30 20:21:41,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3387 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-08-30 20:21:41,562 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2638 flow [2023-08-30 20:21:41,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2638, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2023-08-30 20:21:41,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-08-30 20:21:41,563 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2638 flow [2023-08-30 20:21:41,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:41,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:41,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:41,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 20:21:41,764 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,SelfDestructingSolverStorable30 [2023-08-30 20:21:41,764 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:41,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash -606930304, now seen corresponding path program 17 times [2023-08-30 20:21:41,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798260575] [2023-08-30 20:21:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798260575] [2023-08-30 20:21:41,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798260575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705210970] [2023-08-30 20:21:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:21:41,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:41,917 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) [2023-08-30 20:21:41,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:21:41,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:21:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:42,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:42,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705210970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:42,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:42,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:42,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146428310] [2023-08-30 20:21:42,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:42,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:42,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2638 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:42,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:42,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:42,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:43,765 INFO L130 PetriNetUnfolder]: 478/996 cut-off events. [2023-08-30 20:21:43,765 INFO L131 PetriNetUnfolder]: For 5549/5549 co-relation queries the response was YES. [2023-08-30 20:21:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 996 events. 478/996 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5773 event pairs, 3 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 5478. Up to 535 conditions per place. [2023-08-30 20:21:43,769 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 221 selfloop transitions, 78 changer transitions 18/317 dead transitions. [2023-08-30 20:21:43,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 3735 flow [2023-08-30 20:21:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 20:21:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 20:21:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1864 transitions. [2023-08-30 20:21:43,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42286751361161523 [2023-08-30 20:21:43,772 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1864 transitions. [2023-08-30 20:21:43,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1864 transitions. [2023-08-30 20:21:43,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:43,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1864 transitions. [2023-08-30 20:21:43,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.27586206896552) internal successors, (1864), 29 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:43,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:43,777 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:43,778 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2638 flow. Second operand 29 states and 1864 transitions. [2023-08-30 20:21:43,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 3735 flow [2023-08-30 20:21:43,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 3663 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-08-30 20:21:43,801 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2946 flow [2023-08-30 20:21:43,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2946, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2023-08-30 20:21:43,801 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-08-30 20:21:43,801 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2946 flow [2023-08-30 20:21:43,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:43,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:43,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:43,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 20:21:44,002 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:44,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash -579224674, now seen corresponding path program 18 times [2023-08-30 20:21:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:44,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320037141] [2023-08-30 20:21:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:44,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320037141] [2023-08-30 20:21:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320037141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428037971] [2023-08-30 20:21:44,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:21:44,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:44,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:44,149 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:44,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:21:44,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:21:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:44,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428037971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:44,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:44,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-30 20:21:44,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703461309] [2023-08-30 20:21:44,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:21:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:21:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:21:44,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:44,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2946 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:44,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:44,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:46,036 INFO L130 PetriNetUnfolder]: 474/971 cut-off events. [2023-08-30 20:21:46,036 INFO L131 PetriNetUnfolder]: For 6452/6452 co-relation queries the response was YES. [2023-08-30 20:21:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 971 events. 474/971 cut-off events. For 6452/6452 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5491 event pairs, 5 based on Foata normal form. 6/975 useless extension candidates. Maximal degree in co-relation 5648. Up to 537 conditions per place. [2023-08-30 20:21:46,043 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 199 selfloop transitions, 79 changer transitions 39/317 dead transitions. [2023-08-30 20:21:46,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 3925 flow [2023-08-30 20:21:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 20:21:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 20:21:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2050 transitions. [2023-08-30 20:21:46,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214638157894737 [2023-08-30 20:21:46,046 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2050 transitions. [2023-08-30 20:21:46,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2050 transitions. [2023-08-30 20:21:46,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:46,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2050 transitions. [2023-08-30 20:21:46,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.0625) internal successors, (2050), 32 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:46,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:46,052 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:46,052 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2946 flow. Second operand 32 states and 2050 transitions. [2023-08-30 20:21:46,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 3925 flow [2023-08-30 20:21:46,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3777 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-08-30 20:21:46,096 INFO L231 Difference]: Finished difference. Result has 235 places, 246 transitions, 2926 flow [2023-08-30 20:21:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2926, PETRI_PLACES=235, PETRI_TRANSITIONS=246} [2023-08-30 20:21:46,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2023-08-30 20:21:46,097 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 246 transitions, 2926 flow [2023-08-30 20:21:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:46,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:46,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:46,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:46,303 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:46,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:46,303 INFO L85 PathProgramCache]: Analyzing trace with hash 925330163, now seen corresponding path program 19 times [2023-08-30 20:21:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:46,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21081754] [2023-08-30 20:21:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21081754] [2023-08-30 20:21:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21081754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549497607] [2023-08-30 20:21:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:21:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:46,473 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:46,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:21:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 20:21:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:46,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549497607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:46,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:46,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-30 20:21:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761137338] [2023-08-30 20:21:46,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:46,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:21:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:21:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-30 20:21:47,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:47,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 246 transitions, 2926 flow. Second operand has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:47,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:47,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:47,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:48,468 INFO L130 PetriNetUnfolder]: 559/1145 cut-off events. [2023-08-30 20:21:48,468 INFO L131 PetriNetUnfolder]: For 7330/7330 co-relation queries the response was YES. [2023-08-30 20:21:48,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1145 events. 559/1145 cut-off events. For 7330/7330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6788 event pairs, 3 based on Foata normal form. 3/1146 useless extension candidates. Maximal degree in co-relation 6863. Up to 419 conditions per place. [2023-08-30 20:21:48,474 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 180 selfloop transitions, 198 changer transitions 20/398 dead transitions. [2023-08-30 20:21:48,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 398 transitions, 4924 flow [2023-08-30 20:21:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 20:21:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 20:21:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2707 transitions. [2023-08-30 20:21:48,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42402882205513787 [2023-08-30 20:21:48,477 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2707 transitions. [2023-08-30 20:21:48,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2707 transitions. [2023-08-30 20:21:48,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:48,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2707 transitions. [2023-08-30 20:21:48,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 64.45238095238095) internal successors, (2707), 42 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:48,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:48,484 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:48,485 INFO L175 Difference]: Start difference. First operand has 235 places, 246 transitions, 2926 flow. Second operand 42 states and 2707 transitions. [2023-08-30 20:21:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 398 transitions, 4924 flow [2023-08-30 20:21:48,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 398 transitions, 4665 flow, removed 76 selfloop flow, removed 23 redundant places. [2023-08-30 20:21:48,533 INFO L231 Difference]: Finished difference. Result has 247 places, 292 transitions, 3892 flow [2023-08-30 20:21:48,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3892, PETRI_PLACES=247, PETRI_TRANSITIONS=292} [2023-08-30 20:21:48,533 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-30 20:21:48,534 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 292 transitions, 3892 flow [2023-08-30 20:21:48,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:48,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:48,534 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:48,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 20:21:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:48,740 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:48,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1602770469, now seen corresponding path program 20 times [2023-08-30 20:21:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446756159] [2023-08-30 20:21:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:48,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446756159] [2023-08-30 20:21:48,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446756159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:48,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653106282] [2023-08-30 20:21:48,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:48,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:48,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:48,894 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:48,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:21:48,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 20:21:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:49,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653106282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:49,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-30 20:21:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899785928] [2023-08-30 20:21:49,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:21:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:21:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-30 20:21:49,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:49,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 292 transitions, 3892 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:49,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:49,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:49,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:50,961 INFO L130 PetriNetUnfolder]: 549/1111 cut-off events. [2023-08-30 20:21:50,961 INFO L131 PetriNetUnfolder]: For 7722/7722 co-relation queries the response was YES. [2023-08-30 20:21:50,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1111 events. 549/1111 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6445 event pairs, 3 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7206. Up to 367 conditions per place. [2023-08-30 20:21:50,967 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 167 selfloop transitions, 180 changer transitions 27/374 dead transitions. [2023-08-30 20:21:50,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5031 flow [2023-08-30 20:21:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:21:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:21:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2384 transitions. [2023-08-30 20:21:50,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238975817923186 [2023-08-30 20:21:50,971 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2384 transitions. [2023-08-30 20:21:50,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2384 transitions. [2023-08-30 20:21:50,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:50,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2384 transitions. [2023-08-30 20:21:50,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.43243243243244) internal successors, (2384), 37 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:50,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:50,975 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:50,975 INFO L175 Difference]: Start difference. First operand has 247 places, 292 transitions, 3892 flow. Second operand 37 states and 2384 transitions. [2023-08-30 20:21:50,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5031 flow [2023-08-30 20:21:51,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4764 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-08-30 20:21:51,017 INFO L231 Difference]: Finished difference. Result has 259 places, 285 transitions, 3911 flow [2023-08-30 20:21:51,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3911, PETRI_PLACES=259, PETRI_TRANSITIONS=285} [2023-08-30 20:21:51,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-08-30 20:21:51,018 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 285 transitions, 3911 flow [2023-08-30 20:21:51,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:51,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:51,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:51,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:51,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:51,219 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:51,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 11806669, now seen corresponding path program 10 times [2023-08-30 20:21:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:51,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537515221] [2023-08-30 20:21:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:51,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:51,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:51,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537515221] [2023-08-30 20:21:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537515221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:51,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027279049] [2023-08-30 20:21:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:21:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:51,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:51,349 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:51,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 20:21:51,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:21:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:51,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:21:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027279049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:51,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:51,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-30 20:21:51,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723275459] [2023-08-30 20:21:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:51,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:21:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:21:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:21:51,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:51,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 285 transitions, 3911 flow. Second operand has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:51,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:51,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:51,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:52,436 INFO L130 PetriNetUnfolder]: 531/1086 cut-off events. [2023-08-30 20:21:52,437 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-08-30 20:21:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1086 events. 531/1086 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6316 event pairs, 5 based on Foata normal form. 6/1080 useless extension candidates. Maximal degree in co-relation 7165. Up to 739 conditions per place. [2023-08-30 20:21:52,442 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 233 selfloop transitions, 99 changer transitions 12/344 dead transitions. [2023-08-30 20:21:52,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4994 flow [2023-08-30 20:21:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:21:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:21:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1419 transitions. [2023-08-30 20:21:52,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243421052631579 [2023-08-30 20:21:52,444 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1419 transitions. [2023-08-30 20:21:52,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1419 transitions. [2023-08-30 20:21:52,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:52,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1419 transitions. [2023-08-30 20:21:52,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.5) internal successors, (1419), 22 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:52,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:52,448 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:52,448 INFO L175 Difference]: Start difference. First operand has 259 places, 285 transitions, 3911 flow. Second operand 22 states and 1419 transitions. [2023-08-30 20:21:52,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4994 flow [2023-08-30 20:21:52,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 344 transitions, 4586 flow, removed 9 selfloop flow, removed 32 redundant places. [2023-08-30 20:21:52,500 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3944 flow [2023-08-30 20:21:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3944, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2023-08-30 20:21:52,500 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-08-30 20:21:52,501 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3944 flow [2023-08-30 20:21:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:52,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:52,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:52,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-30 20:21:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 20:21:52,702 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:52,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -61882811, now seen corresponding path program 11 times [2023-08-30 20:21:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:52,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025521812] [2023-08-30 20:21:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025521812] [2023-08-30 20:21:52,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025521812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:52,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029403536] [2023-08-30 20:21:52,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:21:52,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:52,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:52,865 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 20:21:52,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:21:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 20:21:52,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:53,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029403536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:53,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 20:21:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513213369] [2023-08-30 20:21:53,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:21:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:21:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-30 20:21:53,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:53,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3944 flow. Second operand has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:53,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:53,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:53,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:54,504 INFO L130 PetriNetUnfolder]: 582/1195 cut-off events. [2023-08-30 20:21:54,505 INFO L131 PetriNetUnfolder]: For 8531/8531 co-relation queries the response was YES. [2023-08-30 20:21:54,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1195 events. 582/1195 cut-off events. For 8531/8531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7177 event pairs, 1 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7866. Up to 699 conditions per place. [2023-08-30 20:21:54,511 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 241 selfloop transitions, 117 changer transitions 29/387 dead transitions. [2023-08-30 20:21:54,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 5428 flow [2023-08-30 20:21:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:21:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:21:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1752 transitions. [2023-08-30 20:21:54,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2023-08-30 20:21:54,513 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1752 transitions. [2023-08-30 20:21:54,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1752 transitions. [2023-08-30 20:21:54,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:54,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1752 transitions. [2023-08-30 20:21:54,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.88888888888889) internal successors, (1752), 27 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:54,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:54,516 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:54,516 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3944 flow. Second operand 27 states and 1752 transitions. [2023-08-30 20:21:54,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 5428 flow [2023-08-30 20:21:54,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5284 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-08-30 20:21:54,561 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4207 flow [2023-08-30 20:21:54,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2023-08-30 20:21:54,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2023-08-30 20:21:54,562 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4207 flow [2023-08-30 20:21:54,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:54,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:54,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:54,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:54,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 20:21:54,763 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:54,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash -905503634, now seen corresponding path program 12 times [2023-08-30 20:21:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:54,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683857419] [2023-08-30 20:21:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:54,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683857419] [2023-08-30 20:21:54,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683857419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347401999] [2023-08-30 20:21:54,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:21:54,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:54,875 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:54,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 20:21:54,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:21:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:55,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347401999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:55,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:55,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-30 20:21:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445421562] [2023-08-30 20:21:55,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:55,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:55,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:55,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4207 flow. Second operand has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:55,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:55,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:55,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:55,849 INFO L130 PetriNetUnfolder]: 569/1145 cut-off events. [2023-08-30 20:21:55,849 INFO L131 PetriNetUnfolder]: For 8719/8719 co-relation queries the response was YES. [2023-08-30 20:21:55,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1145 events. 569/1145 cut-off events. For 8719/8719 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6711 event pairs, 3 based on Foata normal form. 13/1146 useless extension candidates. Maximal degree in co-relation 7890. Up to 413 conditions per place. [2023-08-30 20:21:55,854 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 76 selfloop transitions, 11 changer transitions 278/365 dead transitions. [2023-08-30 20:21:55,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5591 flow [2023-08-30 20:21:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:21:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:21:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1406 transitions. [2023-08-30 20:21:55,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2023-08-30 20:21:55,855 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1406 transitions. [2023-08-30 20:21:55,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1406 transitions. [2023-08-30 20:21:55,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:55,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1406 transitions. [2023-08-30 20:21:55,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.90909090909091) internal successors, (1406), 22 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:55,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:55,858 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:55,858 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4207 flow. Second operand 22 states and 1406 transitions. [2023-08-30 20:21:55,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5591 flow [2023-08-30 20:21:55,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 5266 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-08-30 20:21:55,903 INFO L231 Difference]: Finished difference. Result has 247 places, 83 transitions, 878 flow [2023-08-30 20:21:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=878, PETRI_PLACES=247, PETRI_TRANSITIONS=83} [2023-08-30 20:21:55,903 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-30 20:21:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 83 transitions, 878 flow [2023-08-30 20:21:55,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:55,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:55,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:55,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-30 20:21:56,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 20:21:56,110 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:56,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551673, now seen corresponding path program 13 times [2023-08-30 20:21:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507523450] [2023-08-30 20:21:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:56,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:56,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507523450] [2023-08-30 20:21:56,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507523450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:56,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987375950] [2023-08-30 20:21:56,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:21:56,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:56,248 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:56,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 20:21:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:56,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:21:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987375950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:56,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-30 20:21:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086674868] [2023-08-30 20:21:56,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:21:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:21:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:21:56,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:56,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 83 transitions, 878 flow. Second operand has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:56,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:56,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:56,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:57,166 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-08-30 20:21:57,166 INFO L131 PetriNetUnfolder]: For 2336/2336 co-relation queries the response was YES. [2023-08-30 20:21:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 308 events. 141/308 cut-off events. For 2336/2336 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1328 event pairs, 0 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1887. Up to 185 conditions per place. [2023-08-30 20:21:57,168 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 57 selfloop transitions, 42 changer transitions 19/118 dead transitions. [2023-08-30 20:21:57,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 118 transitions, 1411 flow [2023-08-30 20:21:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:21:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:21:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1141 transitions. [2023-08-30 20:21:57,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41703216374269003 [2023-08-30 20:21:57,169 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1141 transitions. [2023-08-30 20:21:57,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1141 transitions. [2023-08-30 20:21:57,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:57,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1141 transitions. [2023-08-30 20:21:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.388888888888886) internal successors, (1141), 18 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:57,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:57,173 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:57,173 INFO L175 Difference]: Start difference. First operand has 247 places, 83 transitions, 878 flow. Second operand 18 states and 1141 transitions. [2023-08-30 20:21:57,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 118 transitions, 1411 flow [2023-08-30 20:21:57,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1085 flow, removed 77 selfloop flow, removed 38 redundant places. [2023-08-30 20:21:57,184 INFO L231 Difference]: Finished difference. Result has 125 places, 86 transitions, 731 flow [2023-08-30 20:21:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=731, PETRI_PLACES=125, PETRI_TRANSITIONS=86} [2023-08-30 20:21:57,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-08-30 20:21:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 86 transitions, 731 flow [2023-08-30 20:21:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:21:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:21:57,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 20:21:57,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 20:21:57,391 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:21:57,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:21:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1359978278, now seen corresponding path program 14 times [2023-08-30 20:21:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:21:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474996111] [2023-08-30 20:21:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:21:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:21:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:21:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:21:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474996111] [2023-08-30 20:21:57,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474996111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:21:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479561749] [2023-08-30 20:21:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:21:57,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:21:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:21:57,521 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:21:57,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 20:21:57,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:21:57,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:21:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:21:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:21:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:21:57,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:21:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:21:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479561749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:21:57,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:21:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-30 20:21:57,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311507253] [2023-08-30 20:21:57,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:21:57,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:21:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:21:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:21:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:21:57,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-30 20:21:57,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 86 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:57,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:21:57,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-30 20:21:57,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:21:58,257 INFO L130 PetriNetUnfolder]: 133/259 cut-off events. [2023-08-30 20:21:58,257 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-08-30 20:21:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 259 events. 133/259 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 952 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1358. Up to 99 conditions per place. [2023-08-30 20:21:58,258 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-08-30 20:21:58,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 114 transitions, 1142 flow [2023-08-30 20:21:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 20:21:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 20:21:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1008 transitions. [2023-08-30 20:21:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-08-30 20:21:58,259 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1008 transitions. [2023-08-30 20:21:58,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1008 transitions. [2023-08-30 20:21:58,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:21:58,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1008 transitions. [2023-08-30 20:21:58,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.0) internal successors, (1008), 16 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:58,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:58,261 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:58,261 INFO L175 Difference]: Start difference. First operand has 125 places, 86 transitions, 731 flow. Second operand 16 states and 1008 transitions. [2023-08-30 20:21:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 114 transitions, 1142 flow [2023-08-30 20:21:58,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1038 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-08-30 20:21:58,265 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-08-30 20:21:58,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-08-30 20:21:58,265 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-08-30 20:21:58,266 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-08-30 20:21:58,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:21:58,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 20:21:58,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 20:21:58,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 20:21:58,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 20:21:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 20:21:58,469 INFO L445 BasicCegarLoop]: Path program histogram: [20, 14, 6] [2023-08-30 20:21:58,471 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 20:21:58,471 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 20:21:58,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 08:21:58 BasicIcfg [2023-08-30 20:21:58,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 20:21:58,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 20:21:58,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 20:21:58,474 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 20:21:58,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:20:50" (3/4) ... [2023-08-30 20:21:58,477 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 20:21:58,483 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 20:21:58,483 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 20:21:58,486 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 20:21:58,486 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 20:21:58,486 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 20:21:58,487 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 20:21:58,510 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 20:21:58,510 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 20:21:58,511 INFO L158 Benchmark]: Toolchain (without parser) took 68922.59ms. Allocated memory was 69.2MB in the beginning and 408.9MB in the end (delta: 339.7MB). Free memory was 38.6MB in the beginning and 245.4MB in the end (delta: -206.9MB). Peak memory consumption was 133.7MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,511 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 30.7MB in the beginning and 30.7MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 20:21:58,511 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.82ms. Allocated memory is still 69.2MB. Free memory was 38.4MB in the beginning and 47.5MB in the end (delta: -9.1MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,511 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.80ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 45.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 20:21:58,511 INFO L158 Benchmark]: Boogie Preprocessor took 43.66ms. Allocated memory is still 69.2MB. Free memory was 45.9MB in the beginning and 44.7MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,512 INFO L158 Benchmark]: RCFGBuilder took 321.75ms. Allocated memory is still 69.2MB. Free memory was 44.4MB in the beginning and 30.5MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,512 INFO L158 Benchmark]: TraceAbstraction took 68216.77ms. Allocated memory was 69.2MB in the beginning and 408.9MB in the end (delta: 339.7MB). Free memory was 29.7MB in the beginning and 247.5MB in the end (delta: -217.8MB). Peak memory consumption was 122.2MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,512 INFO L158 Benchmark]: Witness Printer took 36.06ms. Allocated memory is still 408.9MB. Free memory was 247.5MB in the beginning and 245.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 20:21:58,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 30.7MB in the beginning and 30.7MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.82ms. Allocated memory is still 69.2MB. Free memory was 38.4MB in the beginning and 47.5MB in the end (delta: -9.1MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.80ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 45.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.66ms. Allocated memory is still 69.2MB. Free memory was 45.9MB in the beginning and 44.7MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 321.75ms. Allocated memory is still 69.2MB. Free memory was 44.4MB in the beginning and 30.5MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 68216.77ms. Allocated memory was 69.2MB in the beginning and 408.9MB in the end (delta: 339.7MB). Free memory was 29.7MB in the beginning and 247.5MB in the end (delta: -217.8MB). Peak memory consumption was 122.2MB. Max. memory is 16.1GB. * Witness Printer took 36.06ms. Allocated memory is still 408.9MB. Free memory was 247.5MB in the beginning and 245.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 68 TotalNumberOfCompositions, 559 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 539, independent: 535, independent conditional: 0, independent unconditional: 535, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 279, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 539, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 68.1s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 37.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9038 SdHoareTripleChecker+Valid, 15.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8567 mSDsluCounter, 3670 SdHoareTripleChecker+Invalid, 13.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3493 mSDsCounter, 975 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35590 IncrementalHoareTripleChecker+Invalid, 36565 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 975 mSolverCounterUnsat, 177 mSDtfsCounter, 35590 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 544 SyntacticMatches, 51 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16179 ImplicationChecksByTransitivity, 23.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4207occurred in iteration=37, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 1140 NumberOfCodeBlocks, 1140 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 19719 SizeOfPredicates, 138 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 108 InterpolantComputations, 6 PerfectInterpolantSequences, 23/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 20:21:58,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE