./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/pthread/stack_longest-2.i -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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:49:58,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:49:58,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:49:59,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:49:59,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:49:59,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:49:59,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:49:59,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:49:59,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:49:59,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:49:59,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:49:59,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:49:59,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:49:59,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:49:59,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:49:59,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:49:59,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:49:59,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:49:59,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:49:59,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:49:59,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:49:59,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:49:59,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:49:59,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:49:59,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:49:59,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:49:59,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:49:59,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:49:59,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:49:59,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:49:59,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:49:59,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:49:59,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:49:59,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:49:59,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:49:59,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:49:59,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:49:59,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:49:59,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:49:59,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:49:59,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:49:59,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:49:59,110 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:49:59,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:49:59,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:49:59,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:49:59,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:49:59,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:49:59,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:49:59,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:49:59,113 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:49:59,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:49:59,114 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:49:59,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:49:59,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:49:59,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:49:59,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:49:59,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:49:59,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:49:59,116 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:49:59,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:49:59,116 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:49:59,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:49:59,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:49:59,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:49:59,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:49:59,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:49:59,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:49:59,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:49:59,119 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:49:59,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:49:59,119 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:49:59,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:49:59,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:49:59,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:49:59,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:49:59,438 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:49:59,439 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:49:59,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 22:50:00,664 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:50:00,943 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:50:00,944 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-30 22:50:00,957 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/818596e0f/107ac27b86804b0f892bbafaa2733041/FLAG909e7588f [2023-08-30 22:50:00,969 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/818596e0f/107ac27b86804b0f892bbafaa2733041 [2023-08-30 22:50:00,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:50:00,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:50:00,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:50:00,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:50:00,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:50:00,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:50:00" (1/1) ... [2023-08-30 22:50:00,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7fc8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:00, skipping insertion in model container [2023-08-30 22:50:00,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:50:00" (1/1) ... [2023-08-30 22:50:00,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:50:01,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:50:01,366 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-08-30 22:50:01,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:50:01,403 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:50:01,464 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2023-08-30 22:50:01,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:50:01,556 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:50:01,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01 WrapperNode [2023-08-30 22:50:01,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:50:01,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:50:01,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:50:01,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:50:01,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,632 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-30 22:50:01,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:50:01,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:50:01,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:50:01,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:50:01,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:50:01,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:50:01,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:50:01,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:50:01,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (1/1) ... [2023-08-30 22:50:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:50:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:01,726 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 22:50:01,755 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 22:50:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:50:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:50:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:50:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:50:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:50:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:50:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:50:01,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:50:01,770 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 22:50:01,958 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:50:01,960 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:50:02,150 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:50:02,158 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:50:02,158 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:50:02,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:50:02 BoogieIcfgContainer [2023-08-30 22:50:02,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:50:02,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:50:02,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:50:02,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:50:02,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:50:00" (1/3) ... [2023-08-30 22:50:02,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff5b8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:50:02, skipping insertion in model container [2023-08-30 22:50:02,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:50:01" (2/3) ... [2023-08-30 22:50:02,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff5b8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:50:02, skipping insertion in model container [2023-08-30 22:50:02,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:50:02" (3/3) ... [2023-08-30 22:50:02,168 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-30 22:50:02,174 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:50:02,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:50:02,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 22:50:02,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:50:02,293 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:50:02,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 318 flow [2023-08-30 22:50:02,412 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-08-30 22:50:02,413 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:50:02,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 10/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 348 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-30 22:50:02,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 151 transitions, 318 flow [2023-08-30 22:50:02,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 140 transitions, 289 flow [2023-08-30 22:50:02,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:50:02,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-30 22:50:02,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 140 transitions, 289 flow [2023-08-30 22:50:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 289 flow [2023-08-30 22:50:02,467 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-08-30 22:50:02,468 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:50:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 140 events. 10/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-30 22:50:02,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-08-30 22:50:05,732 INFO L134 LiptonReduction]: Checked pairs total: 8978 [2023-08-30 22:50:05,732 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-30 22:50:05,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:50:05,761 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;@4ef3ec04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:50:05,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:50:05,767 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-08-30 22:50:05,768 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:50:05,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:05,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 22:50:05,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:05,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 920078475, now seen corresponding path program 1 times [2023-08-30 22:50:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:05,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978722183] [2023-08-30 22:50:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:06,076 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 22:50:06,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978722183] [2023-08-30 22:50:06,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978722183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:06,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:50:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672060597] [2023-08-30 22:50:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:06,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:50:06,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:50:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:50:06,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-08-30 22:50:06,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:06,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-08-30 22:50:06,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:06,340 INFO L130 PetriNetUnfolder]: 539/918 cut-off events. [2023-08-30 22:50:06,340 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 22:50:06,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3466 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2023-08-30 22:50:06,347 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 22:50:06,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2023-08-30 22:50:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:50:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:50:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 22:50:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-30 22:50:06,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 22:50:06,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 22:50:06,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:06,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 22:50:06,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,376 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 450 transitions. [2023-08-30 22:50:06,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2023-08-30 22:50:06,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:50:06,381 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-08-30 22:50:06,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-30 22:50:06,385 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 22:50:06,386 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-08-30 22:50:06,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:06,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:50:06,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:06,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1451273937, now seen corresponding path program 1 times [2023-08-30 22:50:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378817394] [2023-08-30 22:50:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:06,462 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 22:50:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378817394] [2023-08-30 22:50:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378817394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:50:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315886927] [2023-08-30 22:50:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:50:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:50:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:50:06,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 282 [2023-08-30 22:50:06,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:06,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 282 [2023-08-30 22:50:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:06,636 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2023-08-30 22:50:06,636 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 22:50:06,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4441 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2023-08-30 22:50:06,642 INFO L137 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-30 22:50:06,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-08-30 22:50:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:50:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:50:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-30 22:50:06,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2023-08-30 22:50:06,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-30 22:50:06,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-30 22:50:06,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:06,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-30 22:50:06,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,650 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 456 transitions. [2023-08-30 22:50:06,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-08-30 22:50:06,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:50:06,653 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-08-30 22:50:06,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-30 22:50:06,654 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 22:50:06,654 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-08-30 22:50:06,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:06,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:06,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:50:06,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:06,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1760034202, now seen corresponding path program 1 times [2023-08-30 22:50:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:06,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162553716] [2023-08-30 22:50:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:06,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162553716] [2023-08-30 22:50:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162553716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874303850] [2023-08-30 22:50:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:06,809 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 22:50:06,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:50:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 22:50:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:06,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874303850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:07,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 22:50:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830915224] [2023-08-30 22:50:07,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 22:50:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 22:50:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 22:50:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 282 [2023-08-30 22:50:07,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:07,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:07,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 282 [2023-08-30 22:50:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:07,626 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2023-08-30 22:50:07,627 INFO L131 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2023-08-30 22:50:07,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12088 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2023-08-30 22:50:07,639 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2023-08-30 22:50:07,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2023-08-30 22:50:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 22:50:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 22:50:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1735 transitions. [2023-08-30 22:50:07,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127068557919622 [2023-08-30 22:50:07,644 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1735 transitions. [2023-08-30 22:50:07,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1735 transitions. [2023-08-30 22:50:07,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:07,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1735 transitions. [2023-08-30 22:50:07,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:07,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:07,656 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 282.0) internal successors, (3666), 13 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:07,656 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1735 transitions. [2023-08-30 22:50:07,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2023-08-30 22:50:07,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:50:07,663 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-08-30 22:50:07,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-30 22:50:07,665 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-30 22:50:07,665 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-08-30 22:50:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.4) internal successors, (1324), 10 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:07,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:07,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:07,677 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 22:50:07,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:07,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:07,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121817, now seen corresponding path program 1 times [2023-08-30 22:50:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:07,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413789775] [2023-08-30 22:50:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:07,993 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 22:50:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413789775] [2023-08-30 22:50:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413789775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:07,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:50:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126679484] [2023-08-30 22:50:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:50:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:50:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:50:08,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 282 [2023-08-30 22:50:08,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:08,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 282 [2023-08-30 22:50:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:08,149 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2023-08-30 22:50:08,149 INFO L131 PetriNetUnfolder]: For 557/557 co-relation queries the response was YES. [2023-08-30 22:50:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4170 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2023-08-30 22:50:08,155 INFO L137 encePairwiseOnDemand]: 277/282 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-30 22:50:08,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2023-08-30 22:50:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:50:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:50:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-30 22:50:08,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236406619385343 [2023-08-30 22:50:08,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-30 22:50:08,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-30 22:50:08,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:08,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-30 22:50:08,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,161 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 443 transitions. [2023-08-30 22:50:08,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2023-08-30 22:50:08,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 22:50:08,167 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-08-30 22:50:08,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 22:50:08,168 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-30 22:50:08,168 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-08-30 22:50:08,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:08,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:08,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:50:08,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:08,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1945408692, now seen corresponding path program 1 times [2023-08-30 22:50:08,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:08,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474780966] [2023-08-30 22:50:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:08,206 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 22:50:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474780966] [2023-08-30 22:50:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474780966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:08,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:50:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135031358] [2023-08-30 22:50:08,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:08,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:50:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:50:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:50:08,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 282 [2023-08-30 22:50:08,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:08,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 282 [2023-08-30 22:50:08,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:08,389 INFO L130 PetriNetUnfolder]: 575/1096 cut-off events. [2023-08-30 22:50:08,389 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-08-30 22:50:08,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4650 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2023-08-30 22:50:08,395 INFO L137 encePairwiseOnDemand]: 276/282 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-30 22:50:08,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2023-08-30 22:50:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:50:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:50:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-30 22:50:08,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2023-08-30 22:50:08,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-30 22:50:08,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-30 22:50:08,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:08,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-30 22:50:08,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,403 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 448 transitions. [2023-08-30 22:50:08,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2023-08-30 22:50:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:50:08,407 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-08-30 22:50:08,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-30 22:50:08,411 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-30 22:50:08,411 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-08-30 22:50:08,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:08,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:08,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:08,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:50:08,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:08,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 498757517, now seen corresponding path program 1 times [2023-08-30 22:50:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:08,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974702026] [2023-08-30 22:50:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:08,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:09,029 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 22:50:09,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974702026] [2023-08-30 22:50:09,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974702026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:09,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 22:50:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026503512] [2023-08-30 22:50:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 22:50:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 22:50:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 22:50:09,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-08-30 22:50:09,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:09,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:09,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-08-30 22:50:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:10,012 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2023-08-30 22:50:10,013 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2023-08-30 22:50:10,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7869 event pairs, 249 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2023-08-30 22:50:10,021 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2023-08-30 22:50:10,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2023-08-30 22:50:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 22:50:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 22:50:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-08-30 22:50:10,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-08-30 22:50:10,025 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-08-30 22:50:10,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-08-30 22:50:10,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:10,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-08-30 22:50:10,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:10,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:10,036 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:10,036 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1172 transitions. [2023-08-30 22:50:10,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2023-08-30 22:50:10,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 22:50:10,044 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2023-08-30 22:50:10,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 22:50:10,047 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-08-30 22:50:10,048 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2023-08-30 22:50:10,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:10,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:10,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:50:10,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:10,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 858373001, now seen corresponding path program 2 times [2023-08-30 22:50:10,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580132202] [2023-08-30 22:50:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:10,619 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 22:50:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:10,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580132202] [2023-08-30 22:50:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580132202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 22:50:10,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560103954] [2023-08-30 22:50:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:10,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 22:50:10,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 22:50:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-30 22:50:11,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 282 [2023-08-30 22:50:11,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:11,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:11,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 282 [2023-08-30 22:50:11,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:11,754 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2023-08-30 22:50:11,755 INFO L131 PetriNetUnfolder]: For 1260/1260 co-relation queries the response was YES. [2023-08-30 22:50:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10771 event pairs, 301 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2023-08-30 22:50:11,766 INFO L137 encePairwiseOnDemand]: 273/282 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2023-08-30 22:50:11,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2023-08-30 22:50:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 22:50:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 22:50:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1172 transitions. [2023-08-30 22:50:11,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46178092986603625 [2023-08-30 22:50:11,770 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1172 transitions. [2023-08-30 22:50:11,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1172 transitions. [2023-08-30 22:50:11,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:11,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1172 transitions. [2023-08-30 22:50:11,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.22222222222223) internal successors, (1172), 9 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:11,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:11,777 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:11,778 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1172 transitions. [2023-08-30 22:50:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2023-08-30 22:50:11,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:50:11,786 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2023-08-30 22:50:11,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-30 22:50:11,788 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-08-30 22:50:11,788 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2023-08-30 22:50:11,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.81818181818181) internal successors, (1329), 11 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:11,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:11,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:50:11,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:11,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2064601814, now seen corresponding path program 1 times [2023-08-30 22:50:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:11,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579393959] [2023-08-30 22:50:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:11,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579393959] [2023-08-30 22:50:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579393959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991570300] [2023-08-30 22:50:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:11,895 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 22:50:11,898 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 22:50:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:11,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 22:50:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:50:12,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:50:12,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991570300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:12,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 22:50:12,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-30 22:50:12,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743748944] [2023-08-30 22:50:12,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:12,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:50:12,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:12,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:50:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-30 22:50:12,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 282 [2023-08-30 22:50:12,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:12,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:12,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 282 [2023-08-30 22:50:12,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:12,370 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2023-08-30 22:50:12,370 INFO L131 PetriNetUnfolder]: For 1999/1999 co-relation queries the response was YES. [2023-08-30 22:50:12,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10876 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2023-08-30 22:50:12,381 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-08-30 22:50:12,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2023-08-30 22:50:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:50:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:50:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2023-08-30 22:50:12,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 22:50:12,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2023-08-30 22:50:12,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2023-08-30 22:50:12,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:12,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2023-08-30 22:50:12,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:12,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:12,390 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:12,390 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 846 transitions. [2023-08-30 22:50:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2023-08-30 22:50:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 22:50:12,399 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2023-08-30 22:50:12,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2023-08-30 22:50:12,400 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-08-30 22:50:12,400 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2023-08-30 22:50:12,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.83333333333334) internal successors, (785), 6 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:12,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:12,401 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:50:12,407 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 22:50:12,606 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 22:50:12,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:12,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1688431302, now seen corresponding path program 2 times [2023-08-30 22:50:12,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:12,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204821319] [2023-08-30 22:50:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204821319] [2023-08-30 22:50:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204821319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:12,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141949779] [2023-08-30 22:50:12,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:50:12,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:12,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:12,802 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 22:50:12,809 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 22:50:12,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:50:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:50:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 22:50:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:12,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:13,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141949779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:13,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:13,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-08-30 22:50:13,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47204869] [2023-08-30 22:50:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 22:50:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 22:50:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-08-30 22:50:13,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 282 [2023-08-30 22:50:13,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:13,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:13,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 282 [2023-08-30 22:50:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:13,806 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2023-08-30 22:50:13,806 INFO L131 PetriNetUnfolder]: For 3963/3963 co-relation queries the response was YES. [2023-08-30 22:50:13,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3963/3963 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14014 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2023-08-30 22:50:13,825 INFO L137 encePairwiseOnDemand]: 274/282 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2023-08-30 22:50:13,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2023-08-30 22:50:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 22:50:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 22:50:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2886 transitions. [2023-08-30 22:50:13,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48733535967578523 [2023-08-30 22:50:13,838 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2886 transitions. [2023-08-30 22:50:13,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2886 transitions. [2023-08-30 22:50:13,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:13,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2886 transitions. [2023-08-30 22:50:13,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:13,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:13,855 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:13,855 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 2886 transitions. [2023-08-30 22:50:13,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2023-08-30 22:50:13,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 22:50:13,870 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2023-08-30 22:50:13,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-08-30 22:50:13,871 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2023-08-30 22:50:13,872 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2023-08-30 22:50:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.3) internal successors, (2586), 20 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:13,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:13,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:13,883 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 22:50:14,078 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 22:50:14,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:14,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 878136134, now seen corresponding path program 3 times [2023-08-30 22:50:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991234510] [2023-08-30 22:50:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:50:14,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:14,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991234510] [2023-08-30 22:50:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991234510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:50:14,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:50:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 22:50:14,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471436355] [2023-08-30 22:50:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:50:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 22:50:14,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 22:50:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-30 22:50:15,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 282 [2023-08-30 22:50:15,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:15,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:15,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 282 [2023-08-30 22:50:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:17,469 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2023-08-30 22:50:17,470 INFO L131 PetriNetUnfolder]: For 9426/9426 co-relation queries the response was YES. [2023-08-30 22:50:17,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16702 conditions, 4959 events. 2655/4959 cut-off events. For 9426/9426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26220 event pairs, 726 based on Foata normal form. 0/4932 useless extension candidates. Maximal degree in co-relation 15140. Up to 1528 conditions per place. [2023-08-30 22:50:17,517 INFO L137 encePairwiseOnDemand]: 264/282 looper letters, 140 selfloop transitions, 131 changer transitions 4/285 dead transitions. [2023-08-30 22:50:17,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 285 transitions, 2535 flow [2023-08-30 22:50:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 22:50:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 22:50:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3156 transitions. [2023-08-30 22:50:17,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144996059889677 [2023-08-30 22:50:17,526 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3156 transitions. [2023-08-30 22:50:17,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3156 transitions. [2023-08-30 22:50:17,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:17,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3156 transitions. [2023-08-30 22:50:17,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.88888888888889) internal successors, (3156), 27 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:17,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:17,560 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:17,560 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 3156 transitions. [2023-08-30 22:50:17,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 285 transitions, 2535 flow [2023-08-30 22:50:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 285 transitions, 2320 flow, removed 78 selfloop flow, removed 8 redundant places. [2023-08-30 22:50:17,606 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2023-08-30 22:50:17,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2023-08-30 22:50:17,607 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-08-30 22:50:17,607 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2023-08-30 22:50:17,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.86666666666666) internal successors, (1693), 15 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:17,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:17,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:17,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:50:17,608 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:17,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash -7541718, now seen corresponding path program 4 times [2023-08-30 22:50:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131360255] [2023-08-30 22:50:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:50:18,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131360255] [2023-08-30 22:50:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131360255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385895276] [2023-08-30 22:50:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:50:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:18,442 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 22:50:18,445 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 22:50:18,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:50:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:50:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 22:50:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:18,620 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 22:50:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 22:50:19,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 22:50:19,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 22:50:19,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-30 22:50:19,787 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 22:50:19,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:20,111 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_360) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-30 22:50:20,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:50:20,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 22:50:20,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:50:20,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 22:50:20,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 22:50:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:50:20,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385895276] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:20,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:20,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2023-08-30 22:50:20,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650498328] [2023-08-30 22:50:20,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:20,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 22:50:20,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 22:50:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1820, Unknown=1, NotChecked=86, Total=2070 [2023-08-30 22:50:20,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 22:50:20,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:20,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:50:20,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 22:50:20,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:50:28,545 INFO L130 PetriNetUnfolder]: 3584/6680 cut-off events. [2023-08-30 22:50:28,546 INFO L131 PetriNetUnfolder]: For 17054/17054 co-relation queries the response was YES. [2023-08-30 22:50:28,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24776 conditions, 6680 events. 3584/6680 cut-off events. For 17054/17054 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 38065 event pairs, 544 based on Foata normal form. 54/6697 useless extension candidates. Maximal degree in co-relation 20420. Up to 1562 conditions per place. [2023-08-30 22:50:28,599 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 274 selfloop transitions, 299 changer transitions 15/588 dead transitions. [2023-08-30 22:50:28,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 588 transitions, 5201 flow [2023-08-30 22:50:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 22:50:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 22:50:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6173 transitions. [2023-08-30 22:50:28,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321912807676262 [2023-08-30 22:50:28,613 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6173 transitions. [2023-08-30 22:50:28,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6173 transitions. [2023-08-30 22:50:28,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:50:28,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6173 transitions. [2023-08-30 22:50:28,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 90.77941176470588) internal successors, (6173), 68 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:28,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:28,650 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 282.0) internal successors, (19458), 69 states have internal predecessors, (19458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:28,650 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 68 states and 6173 transitions. [2023-08-30 22:50:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 588 transitions, 5201 flow [2023-08-30 22:50:28,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 588 transitions, 4980 flow, removed 60 selfloop flow, removed 6 redundant places. [2023-08-30 22:50:28,757 INFO L231 Difference]: Finished difference. Result has 214 places, 345 transitions, 3990 flow [2023-08-30 22:50:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3990, PETRI_PLACES=214, PETRI_TRANSITIONS=345} [2023-08-30 22:50:28,758 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 180 predicate places. [2023-08-30 22:50:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 345 transitions, 3990 flow [2023-08-30 22:50:28,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 86.82608695652173) internal successors, (3994), 46 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:50:28,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:50:28,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:50:28,769 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 22:50:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:28,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:50:28,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:50:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash 366211873, now seen corresponding path program 1 times [2023-08-30 22:50:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:50:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190495188] [2023-08-30 22:50:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:50:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:50:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190495188] [2023-08-30 22:50:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190495188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:50:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058358460] [2023-08-30 22:50:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:50:30,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:50:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:50:30,328 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 22:50:30,329 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 22:50:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:50:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-30 22:50:30,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:50:30,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 22:50:31,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2023-08-30 22:50:36,313 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-30 22:50:36,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 46 [2023-08-30 22:50:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:36,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:50:37,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-30 22:50:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:50:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058358460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:50:38,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:50:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2023-08-30 22:50:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782687318] [2023-08-30 22:50:38,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:50:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-30 22:50:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:50:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-30 22:50:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3924, Unknown=2, NotChecked=0, Total=4290 [2023-08-30 22:50:40,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:42,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:45,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:47,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:49,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:51,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:53,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:55,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:57,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:50:59,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:01,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:03,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:05,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:08,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:10,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:12,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:12,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-30 22:51:12,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 345 transitions, 3990 flow. Second operand has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:51:12,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:51:12,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-30 22:51:12,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:51:38,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:51:58,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 22:52:19,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:20,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:34,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:37,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:39,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:41,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:52:56,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:53:05,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:53:07,166 INFO L130 PetriNetUnfolder]: 6621/12421 cut-off events. [2023-08-30 22:53:07,166 INFO L131 PetriNetUnfolder]: For 132271/132271 co-relation queries the response was YES. [2023-08-30 22:53:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76930 conditions, 12421 events. 6621/12421 cut-off events. For 132271/132271 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 80511 event pairs, 1368 based on Foata normal form. 68/12430 useless extension candidates. Maximal degree in co-relation 65168. Up to 4620 conditions per place. [2023-08-30 22:53:07,402 INFO L137 encePairwiseOnDemand]: 262/282 looper letters, 716 selfloop transitions, 452 changer transitions 214/1382 dead transitions. [2023-08-30 22:53:07,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1382 transitions, 16968 flow [2023-08-30 22:53:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-08-30 22:53:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2023-08-30 22:53:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 15397 transitions. [2023-08-30 22:53:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33496497411129966 [2023-08-30 22:53:07,430 INFO L72 ComplementDD]: Start complementDD. Operand 163 states and 15397 transitions. [2023-08-30 22:53:07,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 15397 transitions. [2023-08-30 22:53:07,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:07,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 163 states and 15397 transitions. [2023-08-30 22:53:07,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 164 states, 163 states have (on average 94.4601226993865) internal successors, (15397), 163 states have internal predecessors, (15397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:07,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 164 states, 164 states have (on average 282.0) internal successors, (46248), 164 states have internal predecessors, (46248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:07,529 INFO L81 ComplementDD]: Finished complementDD. Result has 164 states, 164 states have (on average 282.0) internal successors, (46248), 164 states have internal predecessors, (46248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:07,529 INFO L175 Difference]: Start difference. First operand has 214 places, 345 transitions, 3990 flow. Second operand 163 states and 15397 transitions. [2023-08-30 22:53:07,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1382 transitions, 16968 flow [2023-08-30 22:53:07,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1382 transitions, 15979 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-08-30 22:53:07,884 INFO L231 Difference]: Finished difference. Result has 391 places, 706 transitions, 8489 flow [2023-08-30 22:53:07,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=8489, PETRI_PLACES=391, PETRI_TRANSITIONS=706} [2023-08-30 22:53:07,885 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 357 predicate places. [2023-08-30 22:53:07,885 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 706 transitions, 8489 flow [2023-08-30 22:53:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 90.63636363636364) internal successors, (5982), 66 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:07,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:07,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:07,897 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 22:53:08,097 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,SelfDestructingSolverStorable11 [2023-08-30 22:53:08,097 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:53:08,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:08,098 INFO L85 PathProgramCache]: Analyzing trace with hash -765198685, now seen corresponding path program 2 times [2023-08-30 22:53:08,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:08,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214552083] [2023-08-30 22:53:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:53:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214552083] [2023-08-30 22:53:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214552083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:53:09,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905599553] [2023-08-30 22:53:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:53:09,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:53:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:53:09,311 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 22:53:09,313 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 22:53:09,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:53:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:53:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-30 22:53:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:53:09,609 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 22:53:09,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 22:53:09,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 22:53:09,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 22:53:10,208 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-30 22:53:10,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-08-30 22:53:10,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-30 22:53:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:53:10,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:53:11,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:53:11,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 22:53:11,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:53:11,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 22:53:11,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 22:53:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:53:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905599553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:53:11,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:53:11,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 57 [2023-08-30 22:53:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120798101] [2023-08-30 22:53:11,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:53:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-30 22:53:11,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-30 22:53:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3212, Unknown=4, NotChecked=0, Total=3422 [2023-08-30 22:53:14,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 22:53:14,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 706 transitions, 8489 flow. Second operand has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:14,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:14,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 22:53:14,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:53:54,056 INFO L130 PetriNetUnfolder]: 10941/20678 cut-off events. [2023-08-30 22:53:54,057 INFO L131 PetriNetUnfolder]: For 249961/249961 co-relation queries the response was YES. [2023-08-30 22:53:54,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133768 conditions, 20678 events. 10941/20678 cut-off events. For 249961/249961 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 145314 event pairs, 1195 based on Foata normal form. 268/20855 useless extension candidates. Maximal degree in co-relation 130959. Up to 7325 conditions per place. [2023-08-30 22:53:54,348 INFO L137 encePairwiseOnDemand]: 262/282 looper letters, 609 selfloop transitions, 1223 changer transitions 111/1943 dead transitions. [2023-08-30 22:53:54,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1943 transitions, 26049 flow [2023-08-30 22:53:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-08-30 22:53:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2023-08-30 22:53:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 15491 transitions. [2023-08-30 22:53:54,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31937572158997196 [2023-08-30 22:53:54,367 INFO L72 ComplementDD]: Start complementDD. Operand 172 states and 15491 transitions. [2023-08-30 22:53:54,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 15491 transitions. [2023-08-30 22:53:54,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:53:54,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 172 states and 15491 transitions. [2023-08-30 22:53:54,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 173 states, 172 states have (on average 90.06395348837209) internal successors, (15491), 172 states have internal predecessors, (15491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:54,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 173 states, 173 states have (on average 282.0) internal successors, (48786), 173 states have internal predecessors, (48786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:54,438 INFO L81 ComplementDD]: Finished complementDD. Result has 173 states, 173 states have (on average 282.0) internal successors, (48786), 173 states have internal predecessors, (48786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:54,438 INFO L175 Difference]: Start difference. First operand has 391 places, 706 transitions, 8489 flow. Second operand 172 states and 15491 transitions. [2023-08-30 22:53:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1943 transitions, 26049 flow [2023-08-30 22:53:55,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1943 transitions, 25184 flow, removed 333 selfloop flow, removed 16 redundant places. [2023-08-30 22:53:55,490 INFO L231 Difference]: Finished difference. Result has 543 places, 1333 transitions, 18612 flow [2023-08-30 22:53:55,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=172, PETRI_FLOW=18612, PETRI_PLACES=543, PETRI_TRANSITIONS=1333} [2023-08-30 22:53:55,492 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 509 predicate places. [2023-08-30 22:53:55,492 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 1333 transitions, 18612 flow [2023-08-30 22:53:55,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 86.76271186440678) internal successors, (5119), 59 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:55,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:53:55,493 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:53:55,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 22:53:55,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:53:55,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:53:55,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:53:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -620239400, now seen corresponding path program 2 times [2023-08-30 22:53:55,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:53:55,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365817012] [2023-08-30 22:53:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:53:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:53:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:53:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:53:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365817012] [2023-08-30 22:53:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365817012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:53:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845041121] [2023-08-30 22:53:55,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:53:55,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:53:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:53:55,928 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 22:53:55,932 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 22:53:56,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:53:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:53:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 22:53:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:53:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:56,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:53:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 22:53:56,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845041121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:53:56,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:53:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-30 22:53:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476800500] [2023-08-30 22:53:56,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:53:56,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 22:53:56,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:53:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 22:53:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 22:53:56,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 282 [2023-08-30 22:53:56,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1333 transitions, 18612 flow. Second operand has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:53:56,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:53:56,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 282 [2023-08-30 22:53:56,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:04,433 INFO L130 PetriNetUnfolder]: 12005/22798 cut-off events. [2023-08-30 22:54:04,433 INFO L131 PetriNetUnfolder]: For 297317/297317 co-relation queries the response was YES. [2023-08-30 22:54:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158040 conditions, 22798 events. 12005/22798 cut-off events. For 297317/297317 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 163923 event pairs, 3034 based on Foata normal form. 116/22883 useless extension candidates. Maximal degree in co-relation 157558. Up to 7917 conditions per place. [2023-08-30 22:54:04,759 INFO L137 encePairwiseOnDemand]: 272/282 looper letters, 988 selfloop transitions, 849 changer transitions 12/1849 dead transitions. [2023-08-30 22:54:04,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1849 transitions, 28967 flow [2023-08-30 22:54:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 22:54:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 22:54:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3537 transitions. [2023-08-30 22:54:04,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2023-08-30 22:54:04,765 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3537 transitions. [2023-08-30 22:54:04,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3537 transitions. [2023-08-30 22:54:04,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:04,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3537 transitions. [2023-08-30 22:54:04,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 131.0) internal successors, (3537), 27 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:04,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:04,778 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 282.0) internal successors, (7896), 28 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:04,778 INFO L175 Difference]: Start difference. First operand has 543 places, 1333 transitions, 18612 flow. Second operand 27 states and 3537 transitions. [2023-08-30 22:54:04,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1849 transitions, 28967 flow [2023-08-30 22:54:06,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 1849 transitions, 26826 flow, removed 933 selfloop flow, removed 20 redundant places. [2023-08-30 22:54:06,318 INFO L231 Difference]: Finished difference. Result has 551 places, 1448 transitions, 21537 flow [2023-08-30 22:54:06,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=16530, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=677, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21537, PETRI_PLACES=551, PETRI_TRANSITIONS=1448} [2023-08-30 22:54:06,319 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 517 predicate places. [2023-08-30 22:54:06,320 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1448 transitions, 21537 flow [2023-08-30 22:54:06,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.04545454545455) internal successors, (2773), 22 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:06,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:06,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:06,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 22:54:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:54:06,521 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:54:06,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2059012358, now seen corresponding path program 3 times [2023-08-30 22:54:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:06,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808246656] [2023-08-30 22:54:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:54:07,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808246656] [2023-08-30 22:54:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808246656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:54:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949298484] [2023-08-30 22:54:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 22:54:07,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:54:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:54:07,931 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 22:54:07,933 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 22:54:08,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 22:54:08,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:54:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-30 22:54:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:54:08,133 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 22:54:08,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 22:54:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 22:54:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:54:08,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-08-30 22:54:08,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 22:54:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-30 22:54:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:54:09,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:54:10,225 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_657) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-30 22:54:11,149 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-30 22:54:11,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-30 22:54:11,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 22:54:11,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-30 22:54:11,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 22:54:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 17 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 22:54:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949298484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:54:15,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:54:15,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 67 [2023-08-30 22:54:15,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939290519] [2023-08-30 22:54:15,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:54:15,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-30 22:54:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:54:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-30 22:54:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=4234, Unknown=23, NotChecked=132, Total=4692 [2023-08-30 22:54:15,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 22:54:15,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1448 transitions, 21537 flow. Second operand has 69 states, 69 states have (on average 86.8695652173913) internal successors, (5994), 69 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:15,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:54:15,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 22:54:15,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:54:47,549 INFO L130 PetriNetUnfolder]: 15457/29363 cut-off events. [2023-08-30 22:54:47,549 INFO L131 PetriNetUnfolder]: For 400807/400807 co-relation queries the response was YES. [2023-08-30 22:54:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206065 conditions, 29363 events. 15457/29363 cut-off events. For 400807/400807 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 219942 event pairs, 2278 based on Foata normal form. 150/29466 useless extension candidates. Maximal degree in co-relation 205599. Up to 10112 conditions per place. [2023-08-30 22:54:48,027 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 583 selfloop transitions, 1774 changer transitions 48/2405 dead transitions. [2023-08-30 22:54:48,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 2405 transitions, 38650 flow [2023-08-30 22:54:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-08-30 22:54:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2023-08-30 22:54:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 13040 transitions. [2023-08-30 22:54:48,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189043775984348 [2023-08-30 22:54:48,043 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 13040 transitions. [2023-08-30 22:54:48,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 13040 transitions. [2023-08-30 22:54:48,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:54:48,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 13040 transitions. [2023-08-30 22:54:48,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 89.93103448275862) internal successors, (13040), 145 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:48,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 282.0) internal successors, (41172), 146 states have internal predecessors, (41172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:48,105 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 282.0) internal successors, (41172), 146 states have internal predecessors, (41172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:48,106 INFO L175 Difference]: Start difference. First operand has 551 places, 1448 transitions, 21537 flow. Second operand 145 states and 13040 transitions. [2023-08-30 22:54:48,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 2405 transitions, 38650 flow [2023-08-30 22:54:50,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 2405 transitions, 37101 flow, removed 400 selfloop flow, removed 11 redundant places. [2023-08-30 22:54:50,220 INFO L231 Difference]: Finished difference. Result has 697 places, 1900 transitions, 31228 flow [2023-08-30 22:54:50,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=20336, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=31228, PETRI_PLACES=697, PETRI_TRANSITIONS=1900} [2023-08-30 22:54:50,221 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 663 predicate places. [2023-08-30 22:54:50,221 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 1900 transitions, 31228 flow [2023-08-30 22:54:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 86.8695652173913) internal successors, (5994), 69 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:54:50,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:54:50,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:54:50,229 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 22:54:50,428 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,SelfDestructingSolverStorable14 [2023-08-30 22:54:50,428 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:54:50,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:54:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1841042545, now seen corresponding path program 4 times [2023-08-30 22:54:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:54:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120924389] [2023-08-30 22:54:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:54:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:54:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:54:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:54:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:54:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120924389] [2023-08-30 22:54:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120924389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:54:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060492332] [2023-08-30 22:54:51,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:54:51,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:54:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:54:51,969 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 22:54:51,972 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 22:54:52,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:54:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:54:52,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-30 22:54:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:54:52,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 22:54:52,790 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:54:52,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2023-08-30 22:54:53,594 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-08-30 22:54:53,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 68 [2023-08-30 22:54:55,423 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 22:54:55,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 49 [2023-08-30 22:54:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:54:55,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:55:19,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-30 22:55:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:55:19,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060492332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:55:19,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:55:19,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 26] total 79 [2023-08-30 22:55:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376557876] [2023-08-30 22:55:19,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:55:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-08-30 22:55:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:55:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-08-30 22:55:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=5940, Unknown=10, NotChecked=0, Total=6480 [2023-08-30 22:55:22,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:26,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:28,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:30,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:34,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:36,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:40,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:43,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:46,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:49,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:51,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:54,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:55:54,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 282 [2023-08-30 22:55:54,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 1900 transitions, 31228 flow. Second operand has 81 states, 81 states have (on average 90.88888888888889) internal successors, (7362), 81 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:55:54,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:55:54,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 282 [2023-08-30 22:55:54,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:56:34,603 WARN L222 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:56:36,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:56:47,827 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:56:50,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:00,968 WARN L222 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:57:04,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:06,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:08,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:10,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:12,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:28,678 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:57:54,238 WARN L222 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 85 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:57:56,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:57:59,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:01,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:15,989 WARN L222 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:58:18,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:22,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:24,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:26,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:28,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:30,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:32,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:58:34,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:59:26,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:59:42,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:59:57,825 INFO L130 PetriNetUnfolder]: 36008/68589 cut-off events. [2023-08-30 22:59:57,825 INFO L131 PetriNetUnfolder]: For 981174/981174 co-relation queries the response was YES. [2023-08-30 22:59:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501975 conditions, 68589 events. 36008/68589 cut-off events. For 981174/981174 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 566999 event pairs, 5151 based on Foata normal form. 376/68906 useless extension candidates. Maximal degree in co-relation 500967. Up to 22950 conditions per place. [2023-08-30 22:59:59,724 INFO L137 encePairwiseOnDemand]: 263/282 looper letters, 2077 selfloop transitions, 3314 changer transitions 386/5777 dead transitions. [2023-08-30 22:59:59,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 5777 transitions, 99962 flow [2023-08-30 22:59:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2023-08-30 22:59:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2023-08-30 22:59:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 30945 transitions. [2023-08-30 22:59:59,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3345550077841204 [2023-08-30 22:59:59,873 INFO L72 ComplementDD]: Start complementDD. Operand 328 states and 30945 transitions. [2023-08-30 22:59:59,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 328 states and 30945 transitions. [2023-08-30 22:59:59,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:59,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 328 states and 30945 transitions. [2023-08-30 22:59:59,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 329 states, 328 states have (on average 94.34451219512195) internal successors, (30945), 328 states have internal predecessors, (30945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:00,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 329 states, 329 states have (on average 282.0) internal successors, (92778), 329 states have internal predecessors, (92778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:00,062 INFO L81 ComplementDD]: Finished complementDD. Result has 329 states, 329 states have (on average 282.0) internal successors, (92778), 329 states have internal predecessors, (92778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:00,062 INFO L175 Difference]: Start difference. First operand has 697 places, 1900 transitions, 31228 flow. Second operand 328 states and 30945 transitions. [2023-08-30 23:00:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 5777 transitions, 99962 flow [2023-08-30 23:00:11,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 5777 transitions, 97739 flow, removed 611 selfloop flow, removed 50 redundant places. [2023-08-30 23:00:11,995 INFO L231 Difference]: Finished difference. Result has 1038 places, 4240 transitions, 79770 flow [2023-08-30 23:00:11,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=29942, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=328, PETRI_FLOW=79770, PETRI_PLACES=1038, PETRI_TRANSITIONS=4240} [2023-08-30 23:00:11,998 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1004 predicate places. [2023-08-30 23:00:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 4240 transitions, 79770 flow [2023-08-30 23:00:11,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 90.88888888888889) internal successors, (7362), 81 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:12,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:12,000 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:00:12,011 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 23:00:12,206 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,SelfDestructingSolverStorable15 [2023-08-30 23:00:12,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:00:12,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -809020241, now seen corresponding path program 5 times [2023-08-30 23:00:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657374447] [2023-08-30 23:00:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:00:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:14,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:00:14,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657374447] [2023-08-30 23:00:14,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657374447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:00:14,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871138418] [2023-08-30 23:00:14,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 23:00:14,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:00:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:00:14,002 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 23:00:14,004 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 23:00:14,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 23:00:14,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 23:00:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-30 23:00:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:00:14,177 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 23:00:14,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 23:00:14,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 23:00:14,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 23:00:14,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-30 23:00:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 23:00:15,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-08-30 23:00:16,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-30 23:00:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:16,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:00:17,742 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_835) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-30 23:00:17,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 23:00:17,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 23:00:17,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 23:00:17,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 23:00:17,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 23:00:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871138418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:00:18,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:00:18,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 78 [2023-08-30 23:00:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671658137] [2023-08-30 23:00:18,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:00:18,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-08-30 23:00:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:00:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-08-30 23:00:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=5866, Unknown=1, NotChecked=154, Total=6320 [2023-08-30 23:00:18,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 282 [2023-08-30 23:00:18,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 4240 transitions, 79770 flow. Second operand has 80 states, 80 states have (on average 86.875) internal successors, (6950), 80 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:18,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:00:18,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 282 [2023-08-30 23:00:18,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:25,417 INFO L130 PetriNetUnfolder]: 37292/71663 cut-off events. [2023-08-30 23:02:25,418 INFO L131 PetriNetUnfolder]: For 1171349/1171349 co-relation queries the response was YES. [2023-08-30 23:02:28,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551473 conditions, 71663 events. 37292/71663 cut-off events. For 1171349/1171349 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 598947 event pairs, 3969 based on Foata normal form. 864/72451 useless extension candidates. Maximal degree in co-relation 550931. Up to 23700 conditions per place. [2023-08-30 23:02:28,971 INFO L137 encePairwiseOnDemand]: 259/282 looper letters, 765 selfloop transitions, 4299 changer transitions 208/5272 dead transitions. [2023-08-30 23:02:28,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1122 places, 5272 transitions, 101571 flow [2023-08-30 23:02:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2023-08-30 23:02:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2023-08-30 23:02:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 22619 transitions. [2023-08-30 23:02:28,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31829055499268266 [2023-08-30 23:02:28,996 INFO L72 ComplementDD]: Start complementDD. Operand 252 states and 22619 transitions. [2023-08-30 23:02:28,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 252 states and 22619 transitions. [2023-08-30 23:02:29,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:29,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 252 states and 22619 transitions. [2023-08-30 23:02:29,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 253 states, 252 states have (on average 89.7579365079365) internal successors, (22619), 252 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:29,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 253 states, 253 states have (on average 282.0) internal successors, (71346), 253 states have internal predecessors, (71346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:29,102 INFO L81 ComplementDD]: Finished complementDD. Result has 253 states, 253 states have (on average 282.0) internal successors, (71346), 253 states have internal predecessors, (71346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:29,103 INFO L175 Difference]: Start difference. First operand has 1038 places, 4240 transitions, 79770 flow. Second operand 252 states and 22619 transitions. [2023-08-30 23:02:29,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1122 places, 5272 transitions, 101571 flow [2023-08-30 23:02:45,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1079 places, 5272 transitions, 98270 flow, removed 1373 selfloop flow, removed 43 redundant places. [2023-08-30 23:02:45,523 INFO L231 Difference]: Finished difference. Result has 1115 places, 4460 transitions, 89927 flow [2023-08-30 23:02:45,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=56697, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3049, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=252, PETRI_FLOW=89927, PETRI_PLACES=1115, PETRI_TRANSITIONS=4460} [2023-08-30 23:02:45,527 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1081 predicate places. [2023-08-30 23:02:45,528 INFO L495 AbstractCegarLoop]: Abstraction has has 1115 places, 4460 transitions, 89927 flow [2023-08-30 23:02:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 86.875) internal successors, (6950), 80 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:45,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:45,529 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:45,537 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 23:02:45,734 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,SelfDestructingSolverStorable16 [2023-08-30 23:02:45,735 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:02:45,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -935071934, now seen corresponding path program 3 times [2023-08-30 23:02:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614598711] [2023-08-30 23:02:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 23:02:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614598711] [2023-08-30 23:02:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614598711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:02:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066202138] [2023-08-30 23:02:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 23:02:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:02:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:02:46,137 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 23:02:46,163 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 23:02:46,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 23:02:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 23:02:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 23:02:46,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:02:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 23:02:46,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:02:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 23:02:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066202138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:02:46,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:02:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2023-08-30 23:02:46,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496733776] [2023-08-30 23:02:46,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:02:46,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 23:02:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 23:02:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-08-30 23:02:46,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-08-30 23:02:46,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1115 places, 4460 transitions, 89927 flow. Second operand has 27 states, 27 states have (on average 126.96296296296296) internal successors, (3428), 27 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:46,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:46,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-08-30 23:02:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15