./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:35:53,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:35:53,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:35:53,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:35:53,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:35:53,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:35:53,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:35:53,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:35:53,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:35:53,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:35:53,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:35:53,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:35:53,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:35:53,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:35:53,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:35:53,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:35:53,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:35:53,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:35:53,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:35:53,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:35:53,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:35:53,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:35:53,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:35:53,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:35:53,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:35:53,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:35:53,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:35:53,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:35:53,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:35:53,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:35:53,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:35:53,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:35:53,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:35:53,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:35:53,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:35:53,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:35:53,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:35:53,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:35:53,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:35:53,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:35:53,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:35:53,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:35:53,873 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:35:53,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:35:53,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:35:53,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:35:53,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:35:53,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:35:53,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:35:53,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:35:53,875 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:35:53,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:35:53,876 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:35:53,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:35:53,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:35:53,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:35:53,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:35:53,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:35:53,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:35:53,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:35:53,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:35:53,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:35:53,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:35:53,879 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:35:53,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:35:53,879 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:35:53,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:35:54,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:35:54,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:35:54,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:35:54,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:35:54,148 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:35:54,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-09-01 13:35:54,982 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:35:55,143 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:35:55,144 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2023-09-01 13:35:55,148 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f29c24d7/e2ca180d93b049238351de06b65a7be3/FLAG769371aff [2023-09-01 13:35:55,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f29c24d7/e2ca180d93b049238351de06b65a7be3 [2023-09-01 13:35:55,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:35:55,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:35:55,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:35:55,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:35:55,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:35:55,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df14b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55, skipping insertion in model container [2023-09-01 13:35:55,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:35:55,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:35:55,322 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-09-01 13:35:55,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:35:55,345 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:35:55,374 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2023-09-01 13:35:55,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:35:55,384 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:35:55,385 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:35:55,389 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:35:55,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55 WrapperNode [2023-09-01 13:35:55,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:35:55,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:35:55,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:35:55,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:35:55,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,436 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 203 [2023-09-01 13:35:55,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:35:55,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:35:55,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:35:55,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:35:55,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:35:55,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:35:55,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:35:55,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:35:55,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (1/1) ... [2023-09-01 13:35:55,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:35:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:55,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:35:55,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:35:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:35:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:35:55,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:35:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:35:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:35:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:35:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:35:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:35:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:35:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:35:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:35:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:35:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:35:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:35:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:35:55,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:35:55,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:35:55,547 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:35:55,637 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:35:55,639 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:35:55,925 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:35:56,010 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:35:56,010 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:35:56,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:35:56 BoogieIcfgContainer [2023-09-01 13:35:56,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:35:56,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:35:56,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:35:56,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:35:56,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:35:55" (1/3) ... [2023-09-01 13:35:56,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798f558f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:35:56, skipping insertion in model container [2023-09-01 13:35:56,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:35:55" (2/3) ... [2023-09-01 13:35:56,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798f558f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:35:56, skipping insertion in model container [2023-09-01 13:35:56,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:35:56" (3/3) ... [2023-09-01 13:35:56,017 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-09-01 13:35:56,022 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:35:56,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:35:56,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:35:56,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:35:56,091 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:35:56,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 147 transitions, 318 flow [2023-09-01 13:35:56,188 INFO L130 PetriNetUnfolder]: 12/144 cut-off events. [2023-09-01 13:35:56,188 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:35:56,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 144 events. 12/144 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 13:35:56,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 147 transitions, 318 flow [2023-09-01 13:35:56,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 134 transitions, 286 flow [2023-09-01 13:35:56,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:35:56,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 134 transitions, 286 flow [2023-09-01 13:35:56,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 134 transitions, 286 flow [2023-09-01 13:35:56,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 134 transitions, 286 flow [2023-09-01 13:35:56,256 INFO L130 PetriNetUnfolder]: 12/134 cut-off events. [2023-09-01 13:35:56,257 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:35:56,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 134 events. 12/134 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 98 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2023-09-01 13:35:56,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-09-01 13:36:00,108 INFO L134 LiptonReduction]: Checked pairs total: 2063 [2023-09-01 13:36:00,109 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-09-01 13:36:00,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:36:00,122 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;@7b298114, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:36:00,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:36:00,126 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2023-09-01 13:36:00,126 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:36:00,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:00,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:00,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:00,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1370048822, now seen corresponding path program 1 times [2023-09-01 13:36:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514682440] [2023-09-01 13:36:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514682440] [2023-09-01 13:36:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514682440] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:36:00,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:36:00,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:36:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562143880] [2023-09-01 13:36:00,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:36:00,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:36:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:36:00,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-09-01 13:36:00,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:00,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-09-01 13:36:00,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:00,648 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2023-09-01 13:36:00,648 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 13:36:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3396 event pairs, 95 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2023-09-01 13:36:00,656 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-09-01 13:36:00,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-09-01 13:36:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:36:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:36:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-09-01 13:36:00,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036496350364964 [2023-09-01 13:36:00,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-09-01 13:36:00,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-09-01 13:36:00,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:00,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-09-01 13:36:00,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,686 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 414 transitions. [2023-09-01 13:36:00,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-09-01 13:36:00,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:36:00,691 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2023-09-01 13:36:00,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-09-01 13:36:00,695 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-09-01 13:36:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2023-09-01 13:36:00,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:00,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:36:00,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:00,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1687574261, now seen corresponding path program 1 times [2023-09-01 13:36:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418991785] [2023-09-01 13:36:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:00,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418991785] [2023-09-01 13:36:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418991785] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:36:00,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:36:00,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:36:00,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266209372] [2023-09-01 13:36:00,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:36:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:36:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:36:00,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 274 [2023-09-01 13:36:00,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:00,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:00,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 274 [2023-09-01 13:36:00,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:01,082 INFO L130 PetriNetUnfolder]: 1149/1685 cut-off events. [2023-09-01 13:36:01,083 INFO L131 PetriNetUnfolder]: For 279/279 co-relation queries the response was YES. [2023-09-01 13:36:01,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 1685 events. 1149/1685 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7707 event pairs, 604 based on Foata normal form. 62/1379 useless extension candidates. Maximal degree in co-relation 1014. Up to 872 conditions per place. [2023-09-01 13:36:01,089 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 60 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-09-01 13:36:01,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2023-09-01 13:36:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:36:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:36:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-09-01 13:36:01,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802919708029197 [2023-09-01 13:36:01,092 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-09-01 13:36:01,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-09-01 13:36:01,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:01,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-09-01 13:36:01,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,097 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,097 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 658 transitions. [2023-09-01 13:36:01,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2023-09-01 13:36:01,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:36:01,100 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 110 flow [2023-09-01 13:36:01,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-09-01 13:36:01,101 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-09-01 13:36:01,101 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 110 flow [2023-09-01 13:36:01,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:01,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:01,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:36:01,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:01,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:01,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1620014424, now seen corresponding path program 1 times [2023-09-01 13:36:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:01,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182864295] [2023-09-01 13:36:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:01,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182864295] [2023-09-01 13:36:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182864295] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:01,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734437165] [2023-09-01 13:36:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:01,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:01,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:01,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:36:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:01,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:36:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:01,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:01,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734437165] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:01,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:01,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-09-01 13:36:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311013416] [2023-09-01 13:36:01,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:01,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:36:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:01,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:36:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:36:01,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 13:36:01,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:01,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 13:36:01,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:01,906 INFO L130 PetriNetUnfolder]: 1377/2035 cut-off events. [2023-09-01 13:36:01,906 INFO L131 PetriNetUnfolder]: For 771/847 co-relation queries the response was YES. [2023-09-01 13:36:01,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2035 events. 1377/2035 cut-off events. For 771/847 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9548 event pairs, 437 based on Foata normal form. 76/1813 useless extension candidates. Maximal degree in co-relation 3286. Up to 520 conditions per place. [2023-09-01 13:36:01,914 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2023-09-01 13:36:01,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 653 flow [2023-09-01 13:36:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:36:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:36:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1225 transitions. [2023-09-01 13:36:01,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470802919708029 [2023-09-01 13:36:01,918 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1225 transitions. [2023-09-01 13:36:01,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1225 transitions. [2023-09-01 13:36:01,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:01,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1225 transitions. [2023-09-01 13:36:01,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.5) internal successors, (1225), 10 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,924 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 274.0) internal successors, (3014), 11 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,925 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 110 flow. Second operand 10 states and 1225 transitions. [2023-09-01 13:36:01,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 653 flow [2023-09-01 13:36:01,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 649 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:36:01,929 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 269 flow [2023-09-01 13:36:01,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-09-01 13:36:01,930 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-09-01 13:36:01,930 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 269 flow [2023-09-01 13:36:01,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:01,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:01,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:01,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:02,136 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 [2023-09-01 13:36:02,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:02,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1693539329, now seen corresponding path program 1 times [2023-09-01 13:36:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:02,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431595583] [2023-09-01 13:36:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:02,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431595583] [2023-09-01 13:36:02,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431595583] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:36:02,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:36:02,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:36:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503038563] [2023-09-01 13:36:02,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:02,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:36:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:02,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:36:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:36:02,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 274 [2023-09-01 13:36:02,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:02,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 274 [2023-09-01 13:36:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:02,453 INFO L130 PetriNetUnfolder]: 1115/1653 cut-off events. [2023-09-01 13:36:02,453 INFO L131 PetriNetUnfolder]: For 2227/2285 co-relation queries the response was YES. [2023-09-01 13:36:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5250 conditions, 1653 events. 1115/1653 cut-off events. For 2227/2285 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7554 event pairs, 556 based on Foata normal form. 98/1731 useless extension candidates. Maximal degree in co-relation 4186. Up to 1284 conditions per place. [2023-09-01 13:36:02,461 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 67 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-09-01 13:36:02,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 481 flow [2023-09-01 13:36:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:36:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:36:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-09-01 13:36:02,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737226277372263 [2023-09-01 13:36:02,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-09-01 13:36:02,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-09-01 13:36:02,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:02,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-09-01 13:36:02,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,467 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,467 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 269 flow. Second operand 5 states and 649 transitions. [2023-09-01 13:36:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 481 flow [2023-09-01 13:36:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 480 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:36:02,476 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 271 flow [2023-09-01 13:36:02,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-09-01 13:36:02,476 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-09-01 13:36:02,476 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 271 flow [2023-09-01 13:36:02,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:02,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:02,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:36:02,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:02,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash -590735817, now seen corresponding path program 1 times [2023-09-01 13:36:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:02,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505942175] [2023-09-01 13:36:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:02,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:02,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:02,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505942175] [2023-09-01 13:36:02,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505942175] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:36:02,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:36:02,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:36:02,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958119562] [2023-09-01 13:36:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:02,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:36:02,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:36:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:36:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 274 [2023-09-01 13:36:02,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:02,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 274 [2023-09-01 13:36:02,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:02,775 INFO L130 PetriNetUnfolder]: 937/1384 cut-off events. [2023-09-01 13:36:02,775 INFO L131 PetriNetUnfolder]: For 1939/2017 co-relation queries the response was YES. [2023-09-01 13:36:02,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 1384 events. 937/1384 cut-off events. For 1939/2017 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6114 event pairs, 376 based on Foata normal form. 92/1470 useless extension candidates. Maximal degree in co-relation 4143. Up to 975 conditions per place. [2023-09-01 13:36:02,781 INFO L137 encePairwiseOnDemand]: 268/274 looper letters, 52 selfloop transitions, 3 changer transitions 25/83 dead transitions. [2023-09-01 13:36:02,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 541 flow [2023-09-01 13:36:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 13:36:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 13:36:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-09-01 13:36:02,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46654501216545013 [2023-09-01 13:36:02,783 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-09-01 13:36:02,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-09-01 13:36:02,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:02,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-09-01 13:36:02,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 274.0) internal successors, (1918), 7 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,787 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 271 flow. Second operand 6 states and 767 transitions. [2023-09-01 13:36:02,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 541 flow [2023-09-01 13:36:02,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 511 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 13:36:02,792 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 219 flow [2023-09-01 13:36:02,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-09-01 13:36:02,793 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-09-01 13:36:02,793 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 219 flow [2023-09-01 13:36:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:02,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:02,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:02,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:36:02,794 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:02,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 705664608, now seen corresponding path program 2 times [2023-09-01 13:36:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595135452] [2023-09-01 13:36:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595135452] [2023-09-01 13:36:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595135452] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:02,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453621256] [2023-09-01 13:36:02,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:36:02,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:02,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:02,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:36:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:36:02,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:36:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:03,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453621256] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:03,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:03,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-09-01 13:36:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920527483] [2023-09-01 13:36:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:36:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:03,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:36:03,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:36:03,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 13:36:03,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:03,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:03,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 13:36:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:03,430 INFO L130 PetriNetUnfolder]: 1525/2203 cut-off events. [2023-09-01 13:36:03,431 INFO L131 PetriNetUnfolder]: For 2637/2637 co-relation queries the response was YES. [2023-09-01 13:36:03,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 2203 events. 1525/2203 cut-off events. For 2637/2637 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10103 event pairs, 265 based on Foata normal form. 16/2216 useless extension candidates. Maximal degree in co-relation 7067. Up to 772 conditions per place. [2023-09-01 13:36:03,441 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 74 selfloop transitions, 33 changer transitions 0/108 dead transitions. [2023-09-01 13:36:03,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 108 transitions, 719 flow [2023-09-01 13:36:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:36:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:36:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 965 transitions. [2023-09-01 13:36:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4402372262773723 [2023-09-01 13:36:03,444 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 965 transitions. [2023-09-01 13:36:03,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 965 transitions. [2023-09-01 13:36:03,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:03,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 965 transitions. [2023-09-01 13:36:03,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:03,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:03,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:03,449 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 219 flow. Second operand 8 states and 965 transitions. [2023-09-01 13:36:03,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 108 transitions, 719 flow [2023-09-01 13:36:03,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 108 transitions, 687 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-09-01 13:36:03,459 INFO L231 Difference]: Finished difference. Result has 53 places, 64 transitions, 469 flow [2023-09-01 13:36:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=469, PETRI_PLACES=53, PETRI_TRANSITIONS=64} [2023-09-01 13:36:03,460 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-09-01 13:36:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 64 transitions, 469 flow [2023-09-01 13:36:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:03,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:03,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:03,665 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,SelfDestructingSolverStorable5 [2023-09-01 13:36:03,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:03,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash -186636764, now seen corresponding path program 3 times [2023-09-01 13:36:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444754177] [2023-09-01 13:36:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444754177] [2023-09-01 13:36:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444754177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023650113] [2023-09-01 13:36:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:36:03,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:03,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:03,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:36:03,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:36:03,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:36:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023650113] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:03,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:03,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-09-01 13:36:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797647293] [2023-09-01 13:36:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:36:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:36:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-09-01 13:36:04,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 13:36:04,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 469 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:04,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 13:36:04,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:04,330 INFO L130 PetriNetUnfolder]: 1631/2359 cut-off events. [2023-09-01 13:36:04,331 INFO L131 PetriNetUnfolder]: For 4764/4764 co-relation queries the response was YES. [2023-09-01 13:36:04,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 2359 events. 1631/2359 cut-off events. For 4764/4764 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10944 event pairs, 201 based on Foata normal form. 12/2370 useless extension candidates. Maximal degree in co-relation 9304. Up to 720 conditions per place. [2023-09-01 13:36:04,344 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 100 selfloop transitions, 39 changer transitions 0/140 dead transitions. [2023-09-01 13:36:04,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 140 transitions, 1134 flow [2023-09-01 13:36:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:36:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:36:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1094 transitions. [2023-09-01 13:36:04,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44363341443633414 [2023-09-01 13:36:04,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1094 transitions. [2023-09-01 13:36:04,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1094 transitions. [2023-09-01 13:36:04,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:04,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1094 transitions. [2023-09-01 13:36:04,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.55555555555556) internal successors, (1094), 9 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,352 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,352 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 469 flow. Second operand 9 states and 1094 transitions. [2023-09-01 13:36:04,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 140 transitions, 1134 flow [2023-09-01 13:36:04,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 140 transitions, 1123 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 13:36:04,370 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 777 flow [2023-09-01 13:36:04,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2023-09-01 13:36:04,371 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-09-01 13:36:04,371 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 777 flow [2023-09-01 13:36:04,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:04,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:04,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:04,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:04,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:04,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1323058908, now seen corresponding path program 4 times [2023-09-01 13:36:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:04,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646561443] [2023-09-01 13:36:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:04,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646561443] [2023-09-01 13:36:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646561443] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998963916] [2023-09-01 13:36:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:36:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:04,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:36:04,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:36:04,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:04,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:36:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:04,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:04,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998963916] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:04,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:04,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-09-01 13:36:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113113665] [2023-09-01 13:36:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:36:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:36:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:36:04,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 13:36:04,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 777 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:04,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:04,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 13:36:04,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:05,232 INFO L130 PetriNetUnfolder]: 1611/2320 cut-off events. [2023-09-01 13:36:05,232 INFO L131 PetriNetUnfolder]: For 8614/8614 co-relation queries the response was YES. [2023-09-01 13:36:05,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10748 conditions, 2320 events. 1611/2320 cut-off events. For 8614/8614 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10623 event pairs, 217 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 10713. Up to 770 conditions per place. [2023-09-01 13:36:05,245 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 81 selfloop transitions, 54 changer transitions 0/136 dead transitions. [2023-09-01 13:36:05,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1287 flow [2023-09-01 13:36:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:36:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:36:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1092 transitions. [2023-09-01 13:36:05,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44282238442822386 [2023-09-01 13:36:05,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1092 transitions. [2023-09-01 13:36:05,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1092 transitions. [2023-09-01 13:36:05,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:05,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1092 transitions. [2023-09-01 13:36:05,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.33333333333333) internal successors, (1092), 9 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,253 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,253 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 777 flow. Second operand 9 states and 1092 transitions. [2023-09-01 13:36:05,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1287 flow [2023-09-01 13:36:05,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1262 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-09-01 13:36:05,276 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 1016 flow [2023-09-01 13:36:05,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2023-09-01 13:36:05,277 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-09-01 13:36:05,277 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 1016 flow [2023-09-01 13:36:05,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:05,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:05,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:05,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:05,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:05,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1413007916, now seen corresponding path program 5 times [2023-09-01 13:36:05,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:05,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49732202] [2023-09-01 13:36:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49732202] [2023-09-01 13:36:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49732202] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83830178] [2023-09-01 13:36:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:36:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:05,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:05,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:36:05,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:36:05,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:36:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:05,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:05,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83830178] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:05,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:05,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-09-01 13:36:05,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497391270] [2023-09-01 13:36:05,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:05,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 13:36:05,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:05,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 13:36:05,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 13:36:05,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 274 [2023-09-01 13:36:05,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 1016 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:05,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:05,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 274 [2023-09-01 13:36:05,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:06,482 INFO L130 PetriNetUnfolder]: 1887/2767 cut-off events. [2023-09-01 13:36:06,482 INFO L131 PetriNetUnfolder]: For 15862/15862 co-relation queries the response was YES. [2023-09-01 13:36:06,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14436 conditions, 2767 events. 1887/2767 cut-off events. For 15862/15862 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12397 event pairs, 30 based on Foata normal form. 14/2780 useless extension candidates. Maximal degree in co-relation 14396. Up to 727 conditions per place. [2023-09-01 13:36:06,501 INFO L137 encePairwiseOnDemand]: 263/274 looper letters, 144 selfloop transitions, 160 changer transitions 0/304 dead transitions. [2023-09-01 13:36:06,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 304 transitions, 3651 flow [2023-09-01 13:36:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:36:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:36:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2447 transitions. [2023-09-01 13:36:06,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42526937782412233 [2023-09-01 13:36:06,507 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2447 transitions. [2023-09-01 13:36:06,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2447 transitions. [2023-09-01 13:36:06,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:06,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2447 transitions. [2023-09-01 13:36:06,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.52380952380952) internal successors, (2447), 21 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:06,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:06,518 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:06,518 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 1016 flow. Second operand 21 states and 2447 transitions. [2023-09-01 13:36:06,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 304 transitions, 3651 flow [2023-09-01 13:36:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 304 transitions, 3553 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 13:36:06,564 INFO L231 Difference]: Finished difference. Result has 98 places, 199 transitions, 2868 flow [2023-09-01 13:36:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2868, PETRI_PLACES=98, PETRI_TRANSITIONS=199} [2023-09-01 13:36:06,564 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2023-09-01 13:36:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 199 transitions, 2868 flow [2023-09-01 13:36:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:06,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:06,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:06,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:06,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:06,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:06,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 533701012, now seen corresponding path program 6 times [2023-09-01 13:36:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:06,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190458737] [2023-09-01 13:36:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:06,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:06,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190458737] [2023-09-01 13:36:06,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190458737] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:06,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220118364] [2023-09-01 13:36:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:36:06,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:06,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:06,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:06,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:36:06,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:36:06,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:36:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:06,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220118364] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:07,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:07,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-09-01 13:36:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268889229] [2023-09-01 13:36:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:36:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:36:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:36:07,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 274 [2023-09-01 13:36:07,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 199 transitions, 2868 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:07,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 274 [2023-09-01 13:36:07,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:07,465 INFO L130 PetriNetUnfolder]: 1846/2692 cut-off events. [2023-09-01 13:36:07,465 INFO L131 PetriNetUnfolder]: For 20393/20393 co-relation queries the response was YES. [2023-09-01 13:36:07,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15823 conditions, 2692 events. 1846/2692 cut-off events. For 20393/20393 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11980 event pairs, 176 based on Foata normal form. 14/2705 useless extension candidates. Maximal degree in co-relation 15775. Up to 764 conditions per place. [2023-09-01 13:36:07,484 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 75 selfloop transitions, 152 changer transitions 0/236 dead transitions. [2023-09-01 13:36:07,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 236 transitions, 3478 flow [2023-09-01 13:36:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:36:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:36:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 962 transitions. [2023-09-01 13:36:07,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43886861313868614 [2023-09-01 13:36:07,487 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 962 transitions. [2023-09-01 13:36:07,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 962 transitions. [2023-09-01 13:36:07,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:07,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 962 transitions. [2023-09-01 13:36:07,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,491 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 274.0) internal successors, (2466), 9 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,491 INFO L175 Difference]: Start difference. First operand has 98 places, 199 transitions, 2868 flow. Second operand 8 states and 962 transitions. [2023-09-01 13:36:07,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 236 transitions, 3478 flow [2023-09-01 13:36:07,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 236 transitions, 3249 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-09-01 13:36:07,578 INFO L231 Difference]: Finished difference. Result has 105 places, 202 transitions, 3194 flow [2023-09-01 13:36:07,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3194, PETRI_PLACES=105, PETRI_TRANSITIONS=202} [2023-09-01 13:36:07,580 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-09-01 13:36:07,580 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 202 transitions, 3194 flow [2023-09-01 13:36:07,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:07,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:07,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:07,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:07,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:07,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1990448776, now seen corresponding path program 1 times [2023-09-01 13:36:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:07,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129312] [2023-09-01 13:36:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:07,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129312] [2023-09-01 13:36:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129312] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209414427] [2023-09-01 13:36:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:07,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:07,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:36:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:36:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209414427] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:07,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:36:07,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:36:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775427392] [2023-09-01 13:36:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:36:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:36:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:36:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:36:07,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 274 [2023-09-01 13:36:07,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 202 transitions, 3194 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:07,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:07,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 274 [2023-09-01 13:36:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:08,271 INFO L130 PetriNetUnfolder]: 1718/2489 cut-off events. [2023-09-01 13:36:08,272 INFO L131 PetriNetUnfolder]: For 26288/26611 co-relation queries the response was YES. [2023-09-01 13:36:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 2489 events. 1718/2489 cut-off events. For 26288/26611 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11148 event pairs, 505 based on Foata normal form. 320/2739 useless extension candidates. Maximal degree in co-relation 15912. Up to 1920 conditions per place. [2023-09-01 13:36:08,288 INFO L137 encePairwiseOnDemand]: 269/274 looper letters, 243 selfloop transitions, 13 changer transitions 0/275 dead transitions. [2023-09-01 13:36:08,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 275 transitions, 4786 flow [2023-09-01 13:36:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:36:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:36:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2023-09-01 13:36:08,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45474452554744527 [2023-09-01 13:36:08,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2023-09-01 13:36:08,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2023-09-01 13:36:08,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:08,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2023-09-01 13:36:08,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,293 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,293 INFO L175 Difference]: Start difference. First operand has 105 places, 202 transitions, 3194 flow. Second operand 5 states and 623 transitions. [2023-09-01 13:36:08,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 275 transitions, 4786 flow [2023-09-01 13:36:08,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 275 transitions, 4615 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 13:36:08,366 INFO L231 Difference]: Finished difference. Result has 105 places, 203 transitions, 3110 flow [2023-09-01 13:36:08,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3110, PETRI_PLACES=105, PETRI_TRANSITIONS=203} [2023-09-01 13:36:08,367 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2023-09-01 13:36:08,367 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 203 transitions, 3110 flow [2023-09-01 13:36:08,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:08,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:08,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:08,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 13:36:08,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:08,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:08,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 3263289, now seen corresponding path program 1 times [2023-09-01 13:36:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055739610] [2023-09-01 13:36:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055739610] [2023-09-01 13:36:08,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055739610] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510985837] [2023-09-01 13:36:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:08,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:08,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:08,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:08,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:36:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 13:36:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:08,977 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 [2023-09-01 13:36:09,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:36:09,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:36:09,083 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 15 treesize of output 7 [2023-09-01 13:36:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510985837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:09,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:09,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5] total 15 [2023-09-01 13:36:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498294331] [2023-09-01 13:36:09,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:36:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:36:09,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:36:09,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 274 [2023-09-01 13:36:09,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 203 transitions, 3110 flow. Second operand has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:09,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:09,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 274 [2023-09-01 13:36:09,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:10,220 INFO L130 PetriNetUnfolder]: 2808/4087 cut-off events. [2023-09-01 13:36:10,220 INFO L131 PetriNetUnfolder]: For 35184/35377 co-relation queries the response was YES. [2023-09-01 13:36:10,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25510 conditions, 4087 events. 2808/4087 cut-off events. For 35184/35377 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19427 event pairs, 415 based on Foata normal form. 167/4232 useless extension candidates. Maximal degree in co-relation 25459. Up to 2601 conditions per place. [2023-09-01 13:36:10,246 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 304 selfloop transitions, 124 changer transitions 1/443 dead transitions. [2023-09-01 13:36:10,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 443 transitions, 6977 flow [2023-09-01 13:36:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:36:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:36:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-09-01 13:36:10,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42223469960696236 [2023-09-01 13:36:10,251 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-09-01 13:36:10,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-09-01 13:36:10,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:10,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-09-01 13:36:10,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:10,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:10,267 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:10,267 INFO L175 Difference]: Start difference. First operand has 105 places, 203 transitions, 3110 flow. Second operand 13 states and 1504 transitions. [2023-09-01 13:36:10,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 443 transitions, 6977 flow [2023-09-01 13:36:10,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 443 transitions, 6940 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 13:36:10,425 INFO L231 Difference]: Finished difference. Result has 122 places, 295 transitions, 5023 flow [2023-09-01 13:36:10,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5023, PETRI_PLACES=122, PETRI_TRANSITIONS=295} [2023-09-01 13:36:10,426 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2023-09-01 13:36:10,426 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 295 transitions, 5023 flow [2023-09-01 13:36:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.52941176470588) internal successors, (1828), 17 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:10,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:10,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:10,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 13:36:10,632 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,SelfDestructingSolverStorable11 [2023-09-01 13:36:10,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:10,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1941319685, now seen corresponding path program 1 times [2023-09-01 13:36:10,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:10,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205674728] [2023-09-01 13:36:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:10,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:11,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:11,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205674728] [2023-09-01 13:36:11,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205674728] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:11,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103613868] [2023-09-01 13:36:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:11,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:11,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:11,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:11,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:36:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 13:36:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:11,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:11,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-09-01 13:36:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:11,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:11,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:11,605 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 23 treesize of output 16 [2023-09-01 13:36:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103613868] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:11,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:11,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2023-09-01 13:36:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626173275] [2023-09-01 13:36:11,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:36:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:36:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-09-01 13:36:12,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-09-01 13:36:12,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 295 transitions, 5023 flow. Second operand has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:12,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:12,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-09-01 13:36:12,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:15,695 INFO L130 PetriNetUnfolder]: 5451/8012 cut-off events. [2023-09-01 13:36:15,695 INFO L131 PetriNetUnfolder]: For 85174/85174 co-relation queries the response was YES. [2023-09-01 13:36:15,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54672 conditions, 8012 events. 5451/8012 cut-off events. For 85174/85174 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42715 event pairs, 420 based on Foata normal form. 4/8014 useless extension candidates. Maximal degree in co-relation 53139. Up to 4552 conditions per place. [2023-09-01 13:36:15,759 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 517 selfloop transitions, 375 changer transitions 9/901 dead transitions. [2023-09-01 13:36:15,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 901 transitions, 15005 flow [2023-09-01 13:36:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 13:36:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 13:36:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3750 transitions. [2023-09-01 13:36:15,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38017031630170317 [2023-09-01 13:36:15,763 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3750 transitions. [2023-09-01 13:36:15,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3750 transitions. [2023-09-01 13:36:15,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:15,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3750 transitions. [2023-09-01 13:36:15,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.16666666666667) internal successors, (3750), 36 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:15,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:15,776 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 274.0) internal successors, (10138), 37 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:15,776 INFO L175 Difference]: Start difference. First operand has 122 places, 295 transitions, 5023 flow. Second operand 36 states and 3750 transitions. [2023-09-01 13:36:15,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 901 transitions, 15005 flow [2023-09-01 13:36:16,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 901 transitions, 14823 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-09-01 13:36:16,217 INFO L231 Difference]: Finished difference. Result has 170 places, 603 transitions, 11912 flow [2023-09-01 13:36:16,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11912, PETRI_PLACES=170, PETRI_TRANSITIONS=603} [2023-09-01 13:36:16,218 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 138 predicate places. [2023-09-01 13:36:16,218 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 603 transitions, 11912 flow [2023-09-01 13:36:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.17857142857143) internal successors, (2721), 28 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:16,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:16,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:16,423 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,SelfDestructingSolverStorable12 [2023-09-01 13:36:16,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:16,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash 246589533, now seen corresponding path program 2 times [2023-09-01 13:36:16,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:16,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023454669] [2023-09-01 13:36:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:16,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023454669] [2023-09-01 13:36:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023454669] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018658948] [2023-09-01 13:36:16,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:36:16,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:16,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:16,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:36:16,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:36:16,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:36:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:16,872 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 15 treesize of output 7 [2023-09-01 13:36:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:16,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:16,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:16,917 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 19 treesize of output 16 [2023-09-01 13:36:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:16,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018658948] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:16,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:16,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-09-01 13:36:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988063772] [2023-09-01 13:36:16,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:16,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:36:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:36:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:36:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-09-01 13:36:17,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 603 transitions, 11912 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:17,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:17,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-09-01 13:36:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:18,994 INFO L130 PetriNetUnfolder]: 7193/10612 cut-off events. [2023-09-01 13:36:18,995 INFO L131 PetriNetUnfolder]: For 168243/168713 co-relation queries the response was YES. [2023-09-01 13:36:19,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82501 conditions, 10612 events. 7193/10612 cut-off events. For 168243/168713 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 61372 event pairs, 786 based on Foata normal form. 354/10876 useless extension candidates. Maximal degree in co-relation 82293. Up to 6266 conditions per place. [2023-09-01 13:36:19,074 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 511 selfloop transitions, 368 changer transitions 1/905 dead transitions. [2023-09-01 13:36:19,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 905 transitions, 18562 flow [2023-09-01 13:36:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:36:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:36:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1377 transitions. [2023-09-01 13:36:19,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568679495686795 [2023-09-01 13:36:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1377 transitions. [2023-09-01 13:36:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1377 transitions. [2023-09-01 13:36:19,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:19,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1377 transitions. [2023-09-01 13:36:19,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.18181818181819) internal successors, (1377), 11 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:19,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:19,080 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:19,080 INFO L175 Difference]: Start difference. First operand has 170 places, 603 transitions, 11912 flow. Second operand 11 states and 1377 transitions. [2023-09-01 13:36:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 905 transitions, 18562 flow [2023-09-01 13:36:20,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 905 transitions, 18110 flow, removed 225 selfloop flow, removed 1 redundant places. [2023-09-01 13:36:20,079 INFO L231 Difference]: Finished difference. Result has 185 places, 747 transitions, 15579 flow [2023-09-01 13:36:20,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=11598, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15579, PETRI_PLACES=185, PETRI_TRANSITIONS=747} [2023-09-01 13:36:20,079 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 153 predicate places. [2023-09-01 13:36:20,079 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 747 transitions, 15579 flow [2023-09-01 13:36:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:20,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:20,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:20,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:36:20,284 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,SelfDestructingSolverStorable13 [2023-09-01 13:36:20,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:20,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 818684429, now seen corresponding path program 2 times [2023-09-01 13:36:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79055932] [2023-09-01 13:36:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:20,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79055932] [2023-09-01 13:36:20,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79055932] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921182446] [2023-09-01 13:36:20,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:36:20,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:20,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:20,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:36:20,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:36:20,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 13:36:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:21,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:21,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-09-01 13:36:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:21,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:21,432 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 23 treesize of output 16 [2023-09-01 13:36:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921182446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:21,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-09-01 13:36:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441228518] [2023-09-01 13:36:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:36:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:21,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:36:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-09-01 13:36:22,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 274 [2023-09-01 13:36:22,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 747 transitions, 15579 flow. Second operand has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:22,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:22,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 274 [2023-09-01 13:36:22,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:28,890 INFO L130 PetriNetUnfolder]: 12880/19067 cut-off events. [2023-09-01 13:36:28,891 INFO L131 PetriNetUnfolder]: For 331470/331470 co-relation queries the response was YES. [2023-09-01 13:36:28,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154945 conditions, 19067 events. 12880/19067 cut-off events. For 331470/331470 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 119864 event pairs, 1424 based on Foata normal form. 9/19076 useless extension candidates. Maximal degree in co-relation 154692. Up to 9189 conditions per place. [2023-09-01 13:36:29,070 INFO L137 encePairwiseOnDemand]: 259/274 looper letters, 760 selfloop transitions, 1216 changer transitions 12/1988 dead transitions. [2023-09-01 13:36:29,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1988 transitions, 39870 flow [2023-09-01 13:36:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-09-01 13:36:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-09-01 13:36:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7303 transitions. [2023-09-01 13:36:29,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507011140991164 [2023-09-01 13:36:29,079 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7303 transitions. [2023-09-01 13:36:29,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7303 transitions. [2023-09-01 13:36:29,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:29,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7303 transitions. [2023-09-01 13:36:29,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 96.09210526315789) internal successors, (7303), 76 states have internal predecessors, (7303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:29,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:29,106 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 274.0) internal successors, (21098), 77 states have internal predecessors, (21098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:29,106 INFO L175 Difference]: Start difference. First operand has 185 places, 747 transitions, 15579 flow. Second operand 76 states and 7303 transitions. [2023-09-01 13:36:29,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1988 transitions, 39870 flow [2023-09-01 13:36:31,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1988 transitions, 38677 flow, removed 403 selfloop flow, removed 2 redundant places. [2023-09-01 13:36:31,950 INFO L231 Difference]: Finished difference. Result has 289 places, 1566 transitions, 35700 flow [2023-09-01 13:36:31,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=15053, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=35700, PETRI_PLACES=289, PETRI_TRANSITIONS=1566} [2023-09-01 13:36:31,950 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 257 predicate places. [2023-09-01 13:36:31,950 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 1566 transitions, 35700 flow [2023-09-01 13:36:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.03225806451613) internal successors, (2791), 31 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:31,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:31,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:31,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 13:36:32,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:36:32,153 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:32,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash 665140195, now seen corresponding path program 3 times [2023-09-01 13:36:32,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:32,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097168711] [2023-09-01 13:36:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:32,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097168711] [2023-09-01 13:36:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097168711] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198662662] [2023-09-01 13:36:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:36:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:32,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:32,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:36:32,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:36:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 13:36:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:33,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:36:33,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:33,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-09-01 13:36:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:33,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:33,447 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 54 treesize of output 38 [2023-09-01 13:36:33,450 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 17 treesize of output 11 [2023-09-01 13:36:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:36:33,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198662662] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:33,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:33,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-09-01 13:36:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771246871] [2023-09-01 13:36:33,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 13:36:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 13:36:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=987, Unknown=4, NotChecked=0, Total=1122 [2023-09-01 13:36:34,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 274 [2023-09-01 13:36:34,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1566 transitions, 35700 flow. Second operand has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:34,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:34,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 274 [2023-09-01 13:36:34,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:36:45,293 INFO L130 PetriNetUnfolder]: 16411/24255 cut-off events. [2023-09-01 13:36:45,294 INFO L131 PetriNetUnfolder]: For 522053/522053 co-relation queries the response was YES. [2023-09-01 13:36:45,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221910 conditions, 24255 events. 16411/24255 cut-off events. For 522053/522053 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 157504 event pairs, 1220 based on Foata normal form. 6/24261 useless extension candidates. Maximal degree in co-relation 221466. Up to 10730 conditions per place. [2023-09-01 13:36:45,549 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 745 selfloop transitions, 1855 changer transitions 12/2612 dead transitions. [2023-09-01 13:36:45,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 2612 transitions, 58363 flow [2023-09-01 13:36:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 13:36:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 13:36:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5035 transitions. [2023-09-01 13:36:45,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871236313868613 [2023-09-01 13:36:45,554 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5035 transitions. [2023-09-01 13:36:45,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5035 transitions. [2023-09-01 13:36:45,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:36:45,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5035 transitions. [2023-09-01 13:36:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 78.671875) internal successors, (5035), 64 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:45,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:45,572 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 274.0) internal successors, (17810), 65 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:45,572 INFO L175 Difference]: Start difference. First operand has 289 places, 1566 transitions, 35700 flow. Second operand 64 states and 5035 transitions. [2023-09-01 13:36:45,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 2612 transitions, 58363 flow [2023-09-01 13:36:53,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2612 transitions, 56308 flow, removed 950 selfloop flow, removed 5 redundant places. [2023-09-01 13:36:53,901 INFO L231 Difference]: Finished difference. Result has 377 places, 2234 transitions, 55044 flow [2023-09-01 13:36:53,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=34171, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=55044, PETRI_PLACES=377, PETRI_TRANSITIONS=2234} [2023-09-01 13:36:53,902 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 345 predicate places. [2023-09-01 13:36:53,902 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2234 transitions, 55044 flow [2023-09-01 13:36:53,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.79411764705883) internal successors, (2407), 34 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:53,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:36:53,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:36:53,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 13:36:54,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:36:54,108 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:36:54,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:36:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1207527799, now seen corresponding path program 3 times [2023-09-01 13:36:54,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:36:54,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617519286] [2023-09-01 13:36:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:36:54,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:36:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:36:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:54,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:36:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617519286] [2023-09-01 13:36:54,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617519286] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:36:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478038980] [2023-09-01 13:36:54,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:36:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:36:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:36:54,386 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:36:54,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:36:54,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:36:54,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:36:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 13:36:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:36:54,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:36:54,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:36:54,637 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 15 treesize of output 7 [2023-09-01 13:36:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:36:54,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:36:54,686 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2023-09-01 13:36:54,690 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_658 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_658) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2023-09-01 13:36:54,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:36:54,700 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 46 treesize of output 34 [2023-09-01 13:36:54,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-09-01 13:36:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 13:36:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478038980] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:36:54,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:36:54,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-09-01 13:36:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634067597] [2023-09-01 13:36:54,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:36:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:36:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:36:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:36:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=311, Unknown=2, NotChecked=74, Total=462 [2023-09-01 13:36:54,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-09-01 13:36:54,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2234 transitions, 55044 flow. Second operand has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:36:54,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:36:54,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-09-01 13:36:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:37:04,923 INFO L130 PetriNetUnfolder]: 16753/24793 cut-off events. [2023-09-01 13:37:04,924 INFO L131 PetriNetUnfolder]: For 728939/729671 co-relation queries the response was YES. [2023-09-01 13:37:05,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250507 conditions, 24793 events. 16753/24793 cut-off events. For 728939/729671 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 163375 event pairs, 1713 based on Foata normal form. 352/24903 useless extension candidates. Maximal degree in co-relation 250006. Up to 14651 conditions per place. [2023-09-01 13:37:05,303 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1214 selfloop transitions, 1178 changer transitions 2/2449 dead transitions. [2023-09-01 13:37:05,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2449 transitions, 63541 flow [2023-09-01 13:37:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:37:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:37:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1402 transitions. [2023-09-01 13:37:05,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935991016282987 [2023-09-01 13:37:05,305 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1402 transitions. [2023-09-01 13:37:05,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1402 transitions. [2023-09-01 13:37:05,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:37:05,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1402 transitions. [2023-09-01 13:37:05,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.84615384615384) internal successors, (1402), 13 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:05,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:05,309 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:05,309 INFO L175 Difference]: Start difference. First operand has 377 places, 2234 transitions, 55044 flow. Second operand 13 states and 1402 transitions. [2023-09-01 13:37:05,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2449 transitions, 63541 flow [2023-09-01 13:37:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2449 transitions, 61866 flow, removed 816 selfloop flow, removed 5 redundant places. [2023-09-01 13:37:20,519 INFO L231 Difference]: Finished difference. Result has 390 places, 2316 transitions, 58068 flow [2023-09-01 13:37:20,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=53511, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=58068, PETRI_PLACES=390, PETRI_TRANSITIONS=2316} [2023-09-01 13:37:20,520 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 358 predicate places. [2023-09-01 13:37:20,520 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 2316 transitions, 58068 flow [2023-09-01 13:37:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.18181818181819) internal successors, (2138), 22 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:20,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:37:20,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:37:20,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:37:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:37:20,725 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:37:20,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:37:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1758949043, now seen corresponding path program 4 times [2023-09-01 13:37:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:37:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443463525] [2023-09-01 13:37:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:37:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:37:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:37:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:20,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:37:20,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443463525] [2023-09-01 13:37:20,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443463525] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:37:20,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519306869] [2023-09-01 13:37:20,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:37:20,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:20,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:37:20,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:37:20,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:37:21,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:37:21,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:37:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:37:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:37:21,116 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 15 treesize of output 7 [2023-09-01 13:37:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:21,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:37:21,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:37:21,154 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 23 treesize of output 16 [2023-09-01 13:37:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:21,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519306869] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:37:21,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:37:21,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-09-01 13:37:21,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368751884] [2023-09-01 13:37:21,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:37:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:37:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:37:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:37:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:37:21,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-09-01 13:37:21,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 2316 transitions, 58068 flow. Second operand has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:21,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:37:21,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-09-01 13:37:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:37:33,324 INFO L130 PetriNetUnfolder]: 19717/29132 cut-off events. [2023-09-01 13:37:33,324 INFO L131 PetriNetUnfolder]: For 933011/934114 co-relation queries the response was YES. [2023-09-01 13:37:33,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298065 conditions, 29132 events. 19717/29132 cut-off events. For 933011/934114 co-relation queries the response was YES. Maximal size of possible extension queue 1536. Compared 196633 event pairs, 4793 based on Foata normal form. 558/29342 useless extension candidates. Maximal degree in co-relation 297513. Up to 23691 conditions per place. [2023-09-01 13:37:33,766 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 1931 selfloop transitions, 805 changer transitions 1/2792 dead transitions. [2023-09-01 13:37:33,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2792 transitions, 74500 flow [2023-09-01 13:37:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:37:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:37:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1370 transitions. [2023-09-01 13:37:33,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-09-01 13:37:33,768 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1370 transitions. [2023-09-01 13:37:33,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1370 transitions. [2023-09-01 13:37:33,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:37:33,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1370 transitions. [2023-09-01 13:37:33,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.54545454545455) internal successors, (1370), 11 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:33,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:33,770 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:33,771 INFO L175 Difference]: Start difference. First operand has 390 places, 2316 transitions, 58068 flow. Second operand 11 states and 1370 transitions. [2023-09-01 13:37:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2792 transitions, 74500 flow [2023-09-01 13:37:53,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2792 transitions, 73290 flow, removed 77 selfloop flow, removed 3 redundant places. [2023-09-01 13:37:53,467 INFO L231 Difference]: Finished difference. Result has 403 places, 2602 transitions, 67072 flow [2023-09-01 13:37:53,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=57003, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=67072, PETRI_PLACES=403, PETRI_TRANSITIONS=2602} [2023-09-01 13:37:53,469 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 371 predicate places. [2023-09-01 13:37:53,469 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 2602 transitions, 67072 flow [2023-09-01 13:37:53,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.15384615384616) internal successors, (1497), 13 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:53,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:37:53,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:37:53,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 13:37:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:53,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:37:53,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:37:53,675 INFO L85 PathProgramCache]: Analyzing trace with hash -209660607, now seen corresponding path program 5 times [2023-09-01 13:37:53,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:37:53,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104420170] [2023-09-01 13:37:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:37:53,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:37:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:37:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:37:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104420170] [2023-09-01 13:37:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104420170] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:37:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169446942] [2023-09-01 13:37:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:37:53,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:37:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:37:53,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:37:53,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:37:54,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:37:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:37:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 13:37:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:37:54,094 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 22 treesize of output 10 [2023-09-01 13:37:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:54,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:37:54,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:37:54,147 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 23 treesize of output 16 [2023-09-01 13:37:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:37:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169446942] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:37:54,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:37:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-09-01 13:37:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360701722] [2023-09-01 13:37:54,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:37:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:37:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:37:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:37:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:37:54,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 274 [2023-09-01 13:37:54,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 2602 transitions, 67072 flow. Second operand has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:37:54,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:37:54,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 274 [2023-09-01 13:37:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:38:07,921 INFO L130 PetriNetUnfolder]: 20363/30059 cut-off events. [2023-09-01 13:38:07,921 INFO L131 PetriNetUnfolder]: For 975206/976288 co-relation queries the response was YES. [2023-09-01 13:38:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314847 conditions, 30059 events. 20363/30059 cut-off events. For 975206/976288 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 203597 event pairs, 5544 based on Foata normal form. 574/30242 useless extension candidates. Maximal degree in co-relation 314280. Up to 27584 conditions per place. [2023-09-01 13:38:08,407 INFO L137 encePairwiseOnDemand]: 265/274 looper letters, 2195 selfloop transitions, 580 changer transitions 1/2831 dead transitions. [2023-09-01 13:38:08,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2831 transitions, 77135 flow [2023-09-01 13:38:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:38:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:38:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1348 transitions. [2023-09-01 13:38:08,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44724618447246184 [2023-09-01 13:38:08,409 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1348 transitions. [2023-09-01 13:38:08,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1348 transitions. [2023-09-01 13:38:08,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:38:08,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1348 transitions. [2023-09-01 13:38:08,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 122.54545454545455) internal successors, (1348), 11 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:08,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:08,412 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 274.0) internal successors, (3288), 12 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:08,412 INFO L175 Difference]: Start difference. First operand has 403 places, 2602 transitions, 67072 flow. Second operand 11 states and 1348 transitions. [2023-09-01 13:38:08,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2831 transitions, 77135 flow [2023-09-01 13:38:28,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 2831 transitions, 75959 flow, removed 343 selfloop flow, removed 3 redundant places. [2023-09-01 13:38:28,898 INFO L231 Difference]: Finished difference. Result has 413 places, 2711 transitions, 69927 flow [2023-09-01 13:38:28,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=65896, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=69927, PETRI_PLACES=413, PETRI_TRANSITIONS=2711} [2023-09-01 13:38:28,900 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2023-09-01 13:38:28,900 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 2711 transitions, 69927 flow [2023-09-01 13:38:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 114.85714285714286) internal successors, (1608), 14 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:28,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:38:28,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:38:28,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 13:38:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:29,101 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:38:29,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:38:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1100337783, now seen corresponding path program 4 times [2023-09-01 13:38:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:38:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444424395] [2023-09-01 13:38:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:38:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:38:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:38:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:29,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:38:29,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444424395] [2023-09-01 13:38:29,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444424395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:38:29,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187126962] [2023-09-01 13:38:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:38:29,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:38:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:38:29,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:38:29,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:38:29,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:38:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:38:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 13:38:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:38:29,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:38:29,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-09-01 13:38:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:29,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:38:29,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:38:29,941 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 23 treesize of output 16 [2023-09-01 13:38:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:38:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187126962] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:38:30,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:38:30,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 27 [2023-09-01 13:38:30,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230520047] [2023-09-01 13:38:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:38:30,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:38:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:38:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:38:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:38:31,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-09-01 13:38:31,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 2711 transitions, 69927 flow. Second operand has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:31,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:38:31,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-09-01 13:38:31,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:38:48,054 INFO L130 PetriNetUnfolder]: 22523/33297 cut-off events. [2023-09-01 13:38:48,054 INFO L131 PetriNetUnfolder]: For 1009333/1009333 co-relation queries the response was YES. [2023-09-01 13:38:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346535 conditions, 33297 events. 22523/33297 cut-off events. For 1009333/1009333 co-relation queries the response was YES. Maximal size of possible extension queue 1674. Compared 226853 event pairs, 4962 based on Foata normal form. 4/33301 useless extension candidates. Maximal degree in co-relation 345956. Up to 24600 conditions per place. [2023-09-01 13:38:48,609 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 1754 selfloop transitions, 1436 changer transitions 9/3199 dead transitions. [2023-09-01 13:38:48,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 3199 transitions, 86309 flow [2023-09-01 13:38:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 13:38:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 13:38:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4403 transitions. [2023-09-01 13:38:48,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3737056526905449 [2023-09-01 13:38:48,613 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4403 transitions. [2023-09-01 13:38:48,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4403 transitions. [2023-09-01 13:38:48,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:38:48,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4403 transitions. [2023-09-01 13:38:48,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 102.3953488372093) internal successors, (4403), 43 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:48,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:48,623 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 274.0) internal successors, (12056), 44 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:38:48,623 INFO L175 Difference]: Start difference. First operand has 413 places, 2711 transitions, 69927 flow. Second operand 43 states and 4403 transitions. [2023-09-01 13:38:48,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 3199 transitions, 86309 flow [2023-09-01 13:39:13,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 3199 transitions, 85047 flow, removed 289 selfloop flow, removed 6 redundant places. [2023-09-01 13:39:13,484 INFO L231 Difference]: Finished difference. Result has 463 places, 2999 transitions, 81530 flow [2023-09-01 13:39:13,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=68826, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=81530, PETRI_PLACES=463, PETRI_TRANSITIONS=2999} [2023-09-01 13:39:13,486 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 431 predicate places. [2023-09-01 13:39:13,487 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2999 transitions, 81530 flow [2023-09-01 13:39:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 97.0) internal successors, (2813), 29 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:13,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:39:13,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:39:13,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:39:13,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:39:13,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:39:13,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:39:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1925660755, now seen corresponding path program 6 times [2023-09-01 13:39:13,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:39:13,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633592420] [2023-09-01 13:39:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:39:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:39:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:39:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:39:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:39:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633592420] [2023-09-01 13:39:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633592420] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:39:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431996123] [2023-09-01 13:39:13,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:39:13,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:39:13,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:39:13,969 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:39:13,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:39:14,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:39:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:39:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 13:39:14,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:39:14,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:39:14,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:39:14,263 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 15 treesize of output 7 [2023-09-01 13:39:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:39:14,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:39:14,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:39:14,337 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 54 treesize of output 38 [2023-09-01 13:39:14,340 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 17 treesize of output 11 [2023-09-01 13:39:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:39:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431996123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:39:14,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:39:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 13:39:14,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635010883] [2023-09-01 13:39:14,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:39:14,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:39:14,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:39:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:39:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=407, Unknown=4, NotChecked=0, Total=506 [2023-09-01 13:39:14,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-09-01 13:39:14,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2999 transitions, 81530 flow. Second operand has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:14,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:39:14,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-09-01 13:39:14,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:39:32,992 INFO L130 PetriNetUnfolder]: 23882/35299 cut-off events. [2023-09-01 13:39:32,992 INFO L131 PetriNetUnfolder]: For 1301011/1302196 co-relation queries the response was YES. [2023-09-01 13:39:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386896 conditions, 35299 events. 23882/35299 cut-off events. For 1301011/1302196 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 244923 event pairs, 5438 based on Foata normal form. 625/35543 useless extension candidates. Maximal degree in co-relation 386112. Up to 27997 conditions per place. [2023-09-01 13:39:33,848 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 2342 selfloop transitions, 911 changer transitions 1/3314 dead transitions. [2023-09-01 13:39:33,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 3314 transitions, 95411 flow [2023-09-01 13:39:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:39:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:39:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2023-09-01 13:39:33,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38838199513381993 [2023-09-01 13:39:33,850 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2023-09-01 13:39:33,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2023-09-01 13:39:33,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:39:33,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2023-09-01 13:39:33,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:33,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:33,853 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:39:33,853 INFO L175 Difference]: Start difference. First operand has 463 places, 2999 transitions, 81530 flow. Second operand 12 states and 1277 transitions. [2023-09-01 13:39:33,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 3314 transitions, 95411 flow [2023-09-01 13:40:06,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 3314 transitions, 94373 flow, removed 346 selfloop flow, removed 6 redundant places. [2023-09-01 13:40:06,354 INFO L231 Difference]: Finished difference. Result has 474 places, 3162 transitions, 87596 flow [2023-09-01 13:40:06,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=80614, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=774, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=87596, PETRI_PLACES=474, PETRI_TRANSITIONS=3162} [2023-09-01 13:40:06,356 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 442 predicate places. [2023-09-01 13:40:06,356 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 3162 transitions, 87596 flow [2023-09-01 13:40:06,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.21739130434783) internal successors, (2236), 23 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:06,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:40:06,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:40:06,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:40:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:40:06,557 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:40:06,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:40:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1421372669, now seen corresponding path program 5 times [2023-09-01 13:40:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:40:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620337174] [2023-09-01 13:40:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:40:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:40:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:40:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:40:07,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620337174] [2023-09-01 13:40:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620337174] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:40:07,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938900701] [2023-09-01 13:40:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:40:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:40:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:40:07,096 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:40:07,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:40:07,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:40:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:40:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjunts are in the unsatisfiable core [2023-09-01 13:40:07,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:40:07,412 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:40:07,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:40:07,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-09-01 13:40:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:07,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:40:07,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:40:07,503 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 23 treesize of output 16 [2023-09-01 13:40:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:40:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938900701] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:40:07,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:40:07,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 26 [2023-09-01 13:40:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054646542] [2023-09-01 13:40:07,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:40:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:40:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:40:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:40:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-09-01 13:40:08,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 274 [2023-09-01 13:40:08,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 3162 transitions, 87596 flow. Second operand has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:08,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:40:08,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 274 [2023-09-01 13:40:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:40:46,349 INFO L130 PetriNetUnfolder]: 40359/61115 cut-off events. [2023-09-01 13:40:46,349 INFO L131 PetriNetUnfolder]: For 2324797/2324797 co-relation queries the response was YES. [2023-09-01 13:40:48,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663920 conditions, 61115 events. 40359/61115 cut-off events. For 2324797/2324797 co-relation queries the response was YES. Maximal size of possible extension queue 3148. Compared 475029 event pairs, 3384 based on Foata normal form. 11/61126 useless extension candidates. Maximal degree in co-relation 663154. Up to 18258 conditions per place. [2023-09-01 13:40:48,489 INFO L137 encePairwiseOnDemand]: 257/274 looper letters, 2631 selfloop transitions, 3595 changer transitions 20/6246 dead transitions. [2023-09-01 13:40:48,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 6246 transitions, 183469 flow [2023-09-01 13:40:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 13:40:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 13:40:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5157 transitions. [2023-09-01 13:40:48,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38410546700431997 [2023-09-01 13:40:48,493 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5157 transitions. [2023-09-01 13:40:48,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5157 transitions. [2023-09-01 13:40:48,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:40:48,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5157 transitions. [2023-09-01 13:40:48,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 105.24489795918367) internal successors, (5157), 49 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:48,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:48,505 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 274.0) internal successors, (13700), 50 states have internal predecessors, (13700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:40:48,505 INFO L175 Difference]: Start difference. First operand has 474 places, 3162 transitions, 87596 flow. Second operand 49 states and 5157 transitions. [2023-09-01 13:40:48,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 6246 transitions, 183469 flow [2023-09-01 13:42:13,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 6246 transitions, 181650 flow, removed 718 selfloop flow, removed 2 redundant places. [2023-09-01 13:42:13,750 INFO L231 Difference]: Finished difference. Result has 535 places, 5085 transitions, 158215 flow [2023-09-01 13:42:13,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=86634, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1963, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=158215, PETRI_PLACES=535, PETRI_TRANSITIONS=5085} [2023-09-01 13:42:13,753 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 503 predicate places. [2023-09-01 13:42:13,753 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 5085 transitions, 158215 flow [2023-09-01 13:42:13,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.07142857142857) internal successors, (2746), 28 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:42:13,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:42:13,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:42:13,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 13:42:13,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:42:13,959 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:42:13,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:42:13,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2024277337, now seen corresponding path program 7 times [2023-09-01 13:42:13,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:42:13,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211045968] [2023-09-01 13:42:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:42:13,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:42:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:42:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:42:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:42:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211045968] [2023-09-01 13:42:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211045968] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:42:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120277706] [2023-09-01 13:42:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:42:14,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:42:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:42:14,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:42:14,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:42:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:42:14,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2023-09-01 13:42:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:42:14,399 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 [2023-09-01 13:42:14,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:42:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:42:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:42:14,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:42:14,548 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 15 treesize of output 7 [2023-09-01 13:42:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:42:14,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:42:14,589 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-09-01 13:42:14,629 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-09-01 13:42:14,635 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-09-01 13:42:14,660 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_926 (Array Int Int)) (v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_926) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927))) (= (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-09-01 13:42:14,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:42:14,667 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 54 treesize of output 43 [2023-09-01 13:42:14,673 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 10294 treesize of output 9654 [2023-09-01 13:42:14,688 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 61 treesize of output 59 [2023-09-01 13:42:14,691 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 122 treesize of output 114 [2023-09-01 13:42:14,701 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 58 treesize of output 54 [2023-09-01 13:42:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 13:42:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120277706] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:42:14,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:42:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-09-01 13:42:14,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503845936] [2023-09-01 13:42:14,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:42:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:42:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:42:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:42:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=379, Unknown=6, NotChecked=172, Total=650 [2023-09-01 13:42:14,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 274 [2023-09-01 13:42:14,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 5085 transitions, 158215 flow. Second operand has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:42:14,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:42:14,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 274 [2023-09-01 13:42:14,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:43:11,432 INFO L130 PetriNetUnfolder]: 41527/63085 cut-off events. [2023-09-01 13:43:11,432 INFO L131 PetriNetUnfolder]: For 2992166/2994921 co-relation queries the response was YES. [2023-09-01 13:43:13,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752504 conditions, 63085 events. 41527/63085 cut-off events. For 2992166/2994921 co-relation queries the response was YES. Maximal size of possible extension queue 3483. Compared 498203 event pairs, 9324 based on Foata normal form. 1361/63803 useless extension candidates. Maximal degree in co-relation 752017. Up to 51793 conditions per place. [2023-09-01 13:43:14,024 INFO L137 encePairwiseOnDemand]: 264/274 looper letters, 4116 selfloop transitions, 1364 changer transitions 1/5579 dead transitions. [2023-09-01 13:43:14,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5579 transitions, 183480 flow [2023-09-01 13:43:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:43:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:43:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1233 transitions. [2023-09-01 13:43:14,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2023-09-01 13:43:14,027 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1233 transitions. [2023-09-01 13:43:14,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1233 transitions. [2023-09-01 13:43:14,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:43:14,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1233 transitions. [2023-09-01 13:43:14,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 94.84615384615384) internal successors, (1233), 13 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:43:14,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:43:14,030 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:43:14,030 INFO L175 Difference]: Start difference. First operand has 535 places, 5085 transitions, 158215 flow. Second operand 13 states and 1233 transitions. [2023-09-01 13:43:14,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5579 transitions, 183480 flow [2023-09-01 13:45:14,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 5579 transitions, 180336 flow, removed 1169 selfloop flow, removed 24 redundant places. [2023-09-01 13:45:14,367 INFO L231 Difference]: Finished difference. Result has 530 places, 5295 transitions, 167148 flow [2023-09-01 13:45:14,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=155364, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=167148, PETRI_PLACES=530, PETRI_TRANSITIONS=5295} [2023-09-01 13:45:14,370 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 498 predicate places. [2023-09-01 13:45:14,370 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 5295 transitions, 167148 flow [2023-09-01 13:45:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.8076923076923) internal successors, (2231), 26 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:45:14,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:45:14,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:45:14,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 13:45:14,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:45:14,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:45:14,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:45:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1171616155, now seen corresponding path program 8 times [2023-09-01 13:45:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:45:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732747137] [2023-09-01 13:45:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:45:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:45:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:45:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:45:14,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:45:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732747137] [2023-09-01 13:45:14,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732747137] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:45:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445285276] [2023-09-01 13:45:14,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:45:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:45:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:45:14,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:45:14,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 13:45:14,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:45:14,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:45:14,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 13:45:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:45:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:45:15,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:45:15,144 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 15 treesize of output 7 [2023-09-01 13:45:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:45:15,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:45:15,182 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_973 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_973) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2023-09-01 13:45:15,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:45:15,208 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 54 treesize of output 38 [2023-09-01 13:45:15,211 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 17 treesize of output 11 [2023-09-01 13:45:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 13:45:15,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445285276] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:45:15,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:45:15,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 13:45:15,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011139722] [2023-09-01 13:45:15,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:45:15,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:45:15,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:45:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:45:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=372, Unknown=2, NotChecked=40, Total=506 [2023-09-01 13:45:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 274 [2023-09-01 13:45:15,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 5295 transitions, 167148 flow. Second operand has 23 states, 23 states have (on average 97.17391304347827) internal successors, (2235), 23 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:45:15,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:45:15,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 274 [2023-09-01 13:45:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:46:20,280 INFO L130 PetriNetUnfolder]: 42324/64214 cut-off events. [2023-09-01 13:46:20,280 INFO L131 PetriNetUnfolder]: For 3020607/3023471 co-relation queries the response was YES. [2023-09-01 13:46:22,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764757 conditions, 64214 events. 42324/64214 cut-off events. For 3020607/3023471 co-relation queries the response was YES. Maximal size of possible extension queue 3564. Compared 507139 event pairs, 10575 based on Foata normal form. 1407/64896 useless extension candidates. Maximal degree in co-relation 763900. Up to 59557 conditions per place. [2023-09-01 13:46:23,037 INFO L137 encePairwiseOnDemand]: 261/274 looper letters, 4533 selfloop transitions, 976 changer transitions 1/5608 dead transitions. [2023-09-01 13:46:23,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 5608 transitions, 186746 flow [2023-09-01 13:46:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:46:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:46:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1263 transitions. [2023-09-01 13:46:23,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841240875912409 [2023-09-01 13:46:23,042 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1263 transitions. [2023-09-01 13:46:23,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1263 transitions. [2023-09-01 13:46:23,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:46:23,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1263 transitions. [2023-09-01 13:46:23,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.25) internal successors, (1263), 12 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:46:23,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:46:23,045 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 274.0) internal successors, (3562), 13 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:46:23,045 INFO L175 Difference]: Start difference. First operand has 530 places, 5295 transitions, 167148 flow. Second operand 12 states and 1263 transitions. [2023-09-01 13:46:23,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 5608 transitions, 186746 flow [2023-09-01 13:48:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 5608 transitions, 185089 flow, removed 598 selfloop flow, removed 4 redundant places. [2023-09-01 13:48:15,364 INFO L231 Difference]: Finished difference. Result has 541 places, 5490 transitions, 174330 flow [2023-09-01 13:48:15,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=165493, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174330, PETRI_PLACES=541, PETRI_TRANSITIONS=5490} [2023-09-01 13:48:15,368 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 509 predicate places. [2023-09-01 13:48:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 5490 transitions, 174330 flow [2023-09-01 13:48:15,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 97.17391304347827) internal successors, (2235), 23 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:48:15,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:48:15,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:48:15,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 13:48:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 13:48:15,569 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:48:15,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:48:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -983720255, now seen corresponding path program 9 times [2023-09-01 13:48:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:48:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109603124] [2023-09-01 13:48:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:48:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:48:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:48:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:48:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:48:15,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109603124] [2023-09-01 13:48:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109603124] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:48:15,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776321370] [2023-09-01 13:48:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:48:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:48:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:48:15,838 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:48:15,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 13:48:15,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:48:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:48:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 13:48:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:48:15,954 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 51 treesize of output 49 [2023-09-01 13:48:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:48:16,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:48:16,043 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 15 treesize of output 7 [2023-09-01 13:48:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:48:16,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:48:16,093 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1022) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-09-01 13:48:16,100 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int)) (v_ArrVal_1021 (Array Int Int))) (= (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1021) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1022) c_~A~0.base) c_~A~0.offset)) c_~res1~0)) is different from false [2023-09-01 13:48:16,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:48:16,107 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 210 treesize of output 146 [2023-09-01 13:48:16,119 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 31 treesize of output 29 [2023-09-01 13:48:16,122 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 32 treesize of output 28 [2023-09-01 13:48:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:48:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776321370] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:48:16,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:48:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-09-01 13:48:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240050376] [2023-09-01 13:48:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:48:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:48:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:48:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:48:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=221, Unknown=2, NotChecked=62, Total=342 [2023-09-01 13:48:16,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 274 [2023-09-01 13:48:16,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 5490 transitions, 174330 flow. Second operand has 19 states, 19 states have (on average 94.15789473684211) internal successors, (1789), 19 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:48:16,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:48:16,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 274 [2023-09-01 13:48:16,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:49:23,927 INFO L130 PetriNetUnfolder]: 44465/67690 cut-off events. [2023-09-01 13:49:23,928 INFO L131 PetriNetUnfolder]: For 3136895/3139360 co-relation queries the response was YES. [2023-09-01 13:49:26,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817227 conditions, 67690 events. 44465/67690 cut-off events. For 3136895/3139360 co-relation queries the response was YES. Maximal size of possible extension queue 3696. Compared 540590 event pairs, 6874 based on Foata normal form. 1172/68330 useless extension candidates. Maximal degree in co-relation 816353. Up to 45843 conditions per place. [2023-09-01 13:49:27,032 INFO L137 encePairwiseOnDemand]: 266/274 looper letters, 3552 selfloop transitions, 2327 changer transitions 2/5979 dead transitions. [2023-09-01 13:49:27,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 5979 transitions, 199628 flow [2023-09-01 13:49:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:49:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:49:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1363 transitions. [2023-09-01 13:49:27,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38265019651880966 [2023-09-01 13:49:27,034 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1363 transitions. [2023-09-01 13:49:27,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1363 transitions. [2023-09-01 13:49:27,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:49:27,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1363 transitions. [2023-09-01 13:49:27,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 104.84615384615384) internal successors, (1363), 13 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:27,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:27,037 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:49:27,038 INFO L175 Difference]: Start difference. First operand has 541 places, 5490 transitions, 174330 flow. Second operand 13 states and 1363 transitions. [2023-09-01 13:49:27,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 5979 transitions, 199628 flow Killed by 15