./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:13:57,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:13:57,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:13:57,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:13:57,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:13:57,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:13:57,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:13:57,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:13:57,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:13:57,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:13:57,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:13:57,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:13:57,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:13:57,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:13:57,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:13:57,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:13:57,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:13:57,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:13:57,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:13:57,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:13:57,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:13:57,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:13:57,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:13:57,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:13:57,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:13:57,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:13:57,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:13:57,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:13:57,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:13:57,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:13:57,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:13:57,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:13:57,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:13:57,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:13:57,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:13:57,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:13:57,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:13:57,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:13:57,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:13:57,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:13:57,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:13:57,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:13:57,866 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:13:57,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:13:57,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:13:57,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:13:57,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:13:57,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:13:57,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:13:57,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:13:57,870 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:13:57,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:13:57,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:13:57,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:13:57,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:13:57,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:13:57,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:13:57,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:13:57,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:13:57,873 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:13:57,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:13:57,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:13:57,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:13:57,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:13:57,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:13:57,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:13:57,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:13:57,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:13:57,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:13:57,876 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:13:57,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:13:57,876 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:13:57,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:13:58,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:13:58,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:13:58,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:13:58,213 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:13:58,214 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:13:58,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-31 02:13:59,364 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:13:59,562 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:13:59,563 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-31 02:13:59,569 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/015829251/a1c332024e964d9fb0fc98fa02d6d2cb/FLAG56c3243ca [2023-08-31 02:13:59,586 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/015829251/a1c332024e964d9fb0fc98fa02d6d2cb [2023-08-31 02:13:59,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:13:59,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:13:59,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:13:59,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:13:59,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:13:59,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19acc2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59, skipping insertion in model container [2023-08-31 02:13:59,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:13:59,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:13:59,765 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-bad-dot-product.wvr.c[2865,2878] [2023-08-31 02:13:59,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:13:59,783 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:13:59,804 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-bad-dot-product.wvr.c[2865,2878] [2023-08-31 02:13:59,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:13:59,815 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:13:59,816 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:13:59,822 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:13:59,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59 WrapperNode [2023-08-31 02:13:59,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:13:59,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:13:59,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:13:59,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:13:59,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,863 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 280 [2023-08-31 02:13:59,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:13:59,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:13:59,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:13:59,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:13:59,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:13:59,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:13:59,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:13:59,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:13:59,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (1/1) ... [2023-08-31 02:13:59,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:13:59,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:13:59,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:13:59,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:13:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:13:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:13:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:13:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:13:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:13:59,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:13:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:13:59,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:13:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:13:59,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:13:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:13:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:13:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:13:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:13:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:13:59,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:13:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:13:59,986 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:14:00,117 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:14:00,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:14:00,509 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:14:00,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:14:00,687 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-31 02:14:00,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:14:00 BoogieIcfgContainer [2023-08-31 02:14:00,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:14:00,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:14:00,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:14:00,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:14:00,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:13:59" (1/3) ... [2023-08-31 02:14:00,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8946ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:14:00, skipping insertion in model container [2023-08-31 02:14:00,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:13:59" (2/3) ... [2023-08-31 02:14:00,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8946ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:14:00, skipping insertion in model container [2023-08-31 02:14:00,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:14:00" (3/3) ... [2023-08-31 02:14:00,696 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-31 02:14:00,705 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:14:00,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:14:00,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:14:00,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:14:00,817 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 02:14:00,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 239 transitions, 502 flow [2023-08-31 02:14:00,984 INFO L130 PetriNetUnfolder]: 25/236 cut-off events. [2023-08-31 02:14:00,985 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:14:00,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 25/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-08-31 02:14:00,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 239 transitions, 502 flow [2023-08-31 02:14:01,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 226 transitions, 470 flow [2023-08-31 02:14:01,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:14:01,029 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 226 transitions, 470 flow [2023-08-31 02:14:01,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 226 transitions, 470 flow [2023-08-31 02:14:01,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 226 transitions, 470 flow [2023-08-31 02:14:01,098 INFO L130 PetriNetUnfolder]: 25/226 cut-off events. [2023-08-31 02:14:01,099 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:14:01,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 25/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-08-31 02:14:01,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 6720 [2023-08-31 02:14:07,682 INFO L134 LiptonReduction]: Checked pairs total: 7402 [2023-08-31 02:14:07,683 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-08-31 02:14:07,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:14:07,699 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;@86b36b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:14:07,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 02:14:07,706 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2023-08-31 02:14:07,706 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:14:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:07,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:07,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:07,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1808989783, now seen corresponding path program 1 times [2023-08-31 02:14:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:07,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653104198] [2023-08-31 02:14:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:07,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:14:08,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653104198] [2023-08-31 02:14:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653104198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:08,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:08,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:14:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689355630] [2023-08-31 02:14:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:14:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:14:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:14:08,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 475 [2023-08-31 02:14:08,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:08,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 475 [2023-08-31 02:14:08,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:08,659 INFO L130 PetriNetUnfolder]: 1162/1537 cut-off events. [2023-08-31 02:14:08,659 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-31 02:14:08,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5522 event pairs, 394 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2023-08-31 02:14:08,672 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-31 02:14:08,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-08-31 02:14:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:14:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:14:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 869 transitions. [2023-08-31 02:14:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573684210526316 [2023-08-31 02:14:08,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 869 transitions. [2023-08-31 02:14:08,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 869 transitions. [2023-08-31 02:14:08,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:08,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 869 transitions. [2023-08-31 02:14:08,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,713 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 869 transitions. [2023-08-31 02:14:08,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-08-31 02:14:08,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 02:14:08,720 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-31 02:14:08,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-31 02:14:08,724 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-31 02:14:08,725 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-31 02:14:08,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:08,726 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] [2023-08-31 02:14:08,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:14:08,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:08,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -120965922, now seen corresponding path program 1 times [2023-08-31 02:14:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869971016] [2023-08-31 02:14:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:14:08,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:08,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869971016] [2023-08-31 02:14:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869971016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:08,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:08,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:14:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210602509] [2023-08-31 02:14:08,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:08,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:14:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:14:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:14:08,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 475 [2023-08-31 02:14:08,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:08,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:08,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 475 [2023-08-31 02:14:08,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:09,178 INFO L130 PetriNetUnfolder]: 1930/2561 cut-off events. [2023-08-31 02:14:09,178 INFO L131 PetriNetUnfolder]: For 392/570 co-relation queries the response was YES. [2023-08-31 02:14:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 2561 events. 1930/2561 cut-off events. For 392/570 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10098 event pairs, 519 based on Foata normal form. 179/2075 useless extension candidates. Maximal degree in co-relation 1614. Up to 1436 conditions per place. [2023-08-31 02:14:09,191 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 52 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-08-31 02:14:09,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 276 flow [2023-08-31 02:14:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:14:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:14:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-31 02:14:09,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140350877192983 [2023-08-31 02:14:09,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-31 02:14:09,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-31 02:14:09,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:09,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-31 02:14:09,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:09,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:09,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:09,202 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 3 states and 686 transitions. [2023-08-31 02:14:09,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 276 flow [2023-08-31 02:14:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 02:14:09,209 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 117 flow [2023-08-31 02:14:09,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-08-31 02:14:09,211 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-31 02:14:09,212 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 117 flow [2023-08-31 02:14:09,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:09,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:09,213 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] [2023-08-31 02:14:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:14:09,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:09,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 568274986, now seen corresponding path program 1 times [2023-08-31 02:14:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:09,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8150610] [2023-08-31 02:14:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:14:09,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8150610] [2023-08-31 02:14:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8150610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:09,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:14:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044857322] [2023-08-31 02:14:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:14:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:14:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:14:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-08-31 02:14:09,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:09,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:09,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-08-31 02:14:09,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:10,275 INFO L130 PetriNetUnfolder]: 4453/5922 cut-off events. [2023-08-31 02:14:10,276 INFO L131 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2023-08-31 02:14:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14415 conditions, 5922 events. 4453/5922 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26577 event pairs, 2338 based on Foata normal form. 122/4506 useless extension candidates. Maximal degree in co-relation 6160. Up to 3038 conditions per place. [2023-08-31 02:14:10,309 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 78 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-31 02:14:10,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 86 transitions, 426 flow [2023-08-31 02:14:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1036 transitions. [2023-08-31 02:14:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362105263157895 [2023-08-31 02:14:10,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1036 transitions. [2023-08-31 02:14:10,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1036 transitions. [2023-08-31 02:14:10,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:10,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1036 transitions. [2023-08-31 02:14:10,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:10,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:10,323 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:10,323 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 117 flow. Second operand 5 states and 1036 transitions. [2023-08-31 02:14:10,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 86 transitions, 426 flow [2023-08-31 02:14:10,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:14:10,336 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 169 flow [2023-08-31 02:14:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-08-31 02:14:10,338 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-31 02:14:10,340 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 169 flow [2023-08-31 02:14:10,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:10,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:10,342 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, 1] [2023-08-31 02:14:10,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:14:10,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:10,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 637640884, now seen corresponding path program 1 times [2023-08-31 02:14:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673680167] [2023-08-31 02:14:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:14:10,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673680167] [2023-08-31 02:14:10,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673680167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:10,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544128852] [2023-08-31 02:14:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:10,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:10,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:10,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:14:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 02:14:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:14:10,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:10,888 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 23 treesize of output 7 [2023-08-31 02:14:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:14:10,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544128852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:14:10,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:14:10,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-31 02:14:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330550715] [2023-08-31 02:14:10,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:14:10,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:14:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:14:10,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:14:11,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-31 02:14:11,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:11,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:11,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-31 02:14:11,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:12,496 INFO L130 PetriNetUnfolder]: 6603/8803 cut-off events. [2023-08-31 02:14:12,497 INFO L131 PetriNetUnfolder]: For 3446/3446 co-relation queries the response was YES. [2023-08-31 02:14:12,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 8803 events. 6603/8803 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42366 event pairs, 3381 based on Foata normal form. 122/6628 useless extension candidates. Maximal degree in co-relation 14940. Up to 3038 conditions per place. [2023-08-31 02:14:12,552 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 121 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-08-31 02:14:12,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 134 transitions, 697 flow [2023-08-31 02:14:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:14:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:14:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1615 transitions. [2023-08-31 02:14:12,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-31 02:14:12,557 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1615 transitions. [2023-08-31 02:14:12,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1615 transitions. [2023-08-31 02:14:12,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:12,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1615 transitions. [2023-08-31 02:14:12,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.875) internal successors, (1615), 8 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:12,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:12,572 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:12,572 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 169 flow. Second operand 8 states and 1615 transitions. [2023-08-31 02:14:12,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 134 transitions, 697 flow [2023-08-31 02:14:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 134 transitions, 693 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:14:12,591 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 241 flow [2023-08-31 02:14:12,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-31 02:14:12,594 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-08-31 02:14:12,594 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 241 flow [2023-08-31 02:14:12,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:12,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:12,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:12,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:12,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:12,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:12,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -963449330, now seen corresponding path program 2 times [2023-08-31 02:14:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:12,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777283148] [2023-08-31 02:14:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:14:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777283148] [2023-08-31 02:14:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777283148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:14:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911724662] [2023-08-31 02:14:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:13,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:14:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:14:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:14:13,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 475 [2023-08-31 02:14:13,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:13,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:13,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 475 [2023-08-31 02:14:13,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:14,065 INFO L130 PetriNetUnfolder]: 6604/8808 cut-off events. [2023-08-31 02:14:14,065 INFO L131 PetriNetUnfolder]: For 5547/5547 co-relation queries the response was YES. [2023-08-31 02:14:14,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 8808 events. 6604/8808 cut-off events. For 5547/5547 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 42154 event pairs, 3131 based on Foata normal form. 3/6504 useless extension candidates. Maximal degree in co-relation 14672. Up to 7287 conditions per place. [2023-08-31 02:14:14,115 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 61 selfloop transitions, 3 changer transitions 4/70 dead transitions. [2023-08-31 02:14:14,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 447 flow [2023-08-31 02:14:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2023-08-31 02:14:14,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341052631578947 [2023-08-31 02:14:14,119 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2023-08-31 02:14:14,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2023-08-31 02:14:14,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:14,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2023-08-31 02:14:14,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:14,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:14,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:14,127 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 241 flow. Second operand 5 states and 1031 transitions. [2023-08-31 02:14:14,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 447 flow [2023-08-31 02:14:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 415 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-31 02:14:14,153 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 237 flow [2023-08-31 02:14:14,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-31 02:14:14,153 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-08-31 02:14:14,154 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 237 flow [2023-08-31 02:14:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:14,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:14,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:14,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:14:14,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:14,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1429325870, now seen corresponding path program 1 times [2023-08-31 02:14:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:14,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955019883] [2023-08-31 02:14:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:14:14,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955019883] [2023-08-31 02:14:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955019883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574874046] [2023-08-31 02:14:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:14,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:14,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:14:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:14:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:14:14,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:14:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574874046] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:14,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:14:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-31 02:14:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676763032] [2023-08-31 02:14:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:14:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:14:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:14:14,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 475 [2023-08-31 02:14:14,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:14,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:14,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 475 [2023-08-31 02:14:14,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:15,245 INFO L130 PetriNetUnfolder]: 5990/8152 cut-off events. [2023-08-31 02:14:15,245 INFO L131 PetriNetUnfolder]: For 8947/9589 co-relation queries the response was YES. [2023-08-31 02:14:15,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 8152 events. 5990/8152 cut-off events. For 8947/9589 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 41270 event pairs, 1923 based on Foata normal form. 642/6955 useless extension candidates. Maximal degree in co-relation 22740. Up to 4077 conditions per place. [2023-08-31 02:14:15,308 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 66 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-31 02:14:15,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 509 flow [2023-08-31 02:14:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1019 transitions. [2023-08-31 02:14:15,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905263157894735 [2023-08-31 02:14:15,312 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1019 transitions. [2023-08-31 02:14:15,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1019 transitions. [2023-08-31 02:14:15,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:15,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1019 transitions. [2023-08-31 02:14:15,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:15,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:15,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:15,320 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 237 flow. Second operand 5 states and 1019 transitions. [2023-08-31 02:14:15,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 509 flow [2023-08-31 02:14:15,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 497 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 02:14:15,355 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 249 flow [2023-08-31 02:14:15,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-31 02:14:15,358 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-31 02:14:15,358 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 249 flow [2023-08-31 02:14:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:15,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:15,359 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, 1, 1, 1, 1] [2023-08-31 02:14:15,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:15,565 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 [2023-08-31 02:14:15,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:15,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1999844878, now seen corresponding path program 1 times [2023-08-31 02:14:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:15,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554959367] [2023-08-31 02:14:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:15,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:15,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554959367] [2023-08-31 02:14:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554959367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:15,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:14:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941255237] [2023-08-31 02:14:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:15,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:14:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:14:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:14:15,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-08-31 02:14:15,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:15,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:15,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-08-31 02:14:15,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:16,752 INFO L130 PetriNetUnfolder]: 6264/8556 cut-off events. [2023-08-31 02:14:16,753 INFO L131 PetriNetUnfolder]: For 9787/10463 co-relation queries the response was YES. [2023-08-31 02:14:16,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 8556 events. 6264/8556 cut-off events. For 9787/10463 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42223 event pairs, 3638 based on Foata normal form. 779/8085 useless extension candidates. Maximal degree in co-relation 26401. Up to 5469 conditions per place. [2023-08-31 02:14:16,811 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-31 02:14:16,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 585 flow [2023-08-31 02:14:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:14:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:14:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2023-08-31 02:14:16,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357894736842105 [2023-08-31 02:14:16,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2023-08-31 02:14:16,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2023-08-31 02:14:16,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:16,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2023-08-31 02:14:16,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:16,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:16,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:16,823 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 249 flow. Second operand 5 states and 1035 transitions. [2023-08-31 02:14:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 585 flow [2023-08-31 02:14:16,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 575 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 02:14:16,853 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 300 flow [2023-08-31 02:14:16,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-31 02:14:16,854 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-31 02:14:16,854 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 300 flow [2023-08-31 02:14:16,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:16,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:16,855 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, 1, 1, 1, 1] [2023-08-31 02:14:16,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 02:14:16,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:16,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 800859454, now seen corresponding path program 2 times [2023-08-31 02:14:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870051487] [2023-08-31 02:14:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:17,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870051487] [2023-08-31 02:14:17,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870051487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:17,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:17,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 02:14:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440765574] [2023-08-31 02:14:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:14:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:14:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:14:17,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-31 02:14:17,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:17,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:17,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-31 02:14:17,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:18,411 INFO L130 PetriNetUnfolder]: 6520/8911 cut-off events. [2023-08-31 02:14:18,412 INFO L131 PetriNetUnfolder]: For 12687/13385 co-relation queries the response was YES. [2023-08-31 02:14:18,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28906 conditions, 8911 events. 6520/8911 cut-off events. For 12687/13385 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44134 event pairs, 3696 based on Foata normal form. 788/8394 useless extension candidates. Maximal degree in co-relation 28874. Up to 5466 conditions per place. [2023-08-31 02:14:18,487 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-08-31 02:14:18,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 631 flow [2023-08-31 02:14:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:14:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:14:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-08-31 02:14:18,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-08-31 02:14:18,492 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-08-31 02:14:18,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-08-31 02:14:18,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:18,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-08-31 02:14:18,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:18,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:18,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:18,501 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 300 flow. Second operand 6 states and 1197 transitions. [2023-08-31 02:14:18,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 631 flow [2023-08-31 02:14:18,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 02:14:18,533 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 329 flow [2023-08-31 02:14:18,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-08-31 02:14:18,536 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2023-08-31 02:14:18,536 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 329 flow [2023-08-31 02:14:18,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:18,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:18,539 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, 1, 1, 1, 1] [2023-08-31 02:14:18,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 02:14:18,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:18,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1628528424, now seen corresponding path program 3 times [2023-08-31 02:14:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532230266] [2023-08-31 02:14:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532230266] [2023-08-31 02:14:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532230266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:14:19,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:14:19,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 02:14:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018434477] [2023-08-31 02:14:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:14:19,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:14:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:14:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:14:19,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 475 [2023-08-31 02:14:19,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:19,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:19,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 475 [2023-08-31 02:14:19,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:20,203 INFO L130 PetriNetUnfolder]: 5942/8166 cut-off events. [2023-08-31 02:14:20,204 INFO L131 PetriNetUnfolder]: For 15503/16163 co-relation queries the response was YES. [2023-08-31 02:14:20,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 8166 events. 5942/8166 cut-off events. For 15503/16163 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40226 event pairs, 3407 based on Foata normal form. 750/7738 useless extension candidates. Maximal degree in co-relation 27626. Up to 5466 conditions per place. [2023-08-31 02:14:20,262 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 81 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-08-31 02:14:20,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 643 flow [2023-08-31 02:14:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:14:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:14:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1188 transitions. [2023-08-31 02:14:20,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168421052631579 [2023-08-31 02:14:20,267 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1188 transitions. [2023-08-31 02:14:20,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1188 transitions. [2023-08-31 02:14:20,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:20,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1188 transitions. [2023-08-31 02:14:20,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:20,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:20,276 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:20,276 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 329 flow. Second operand 6 states and 1188 transitions. [2023-08-31 02:14:20,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 643 flow [2023-08-31 02:14:20,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 630 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 02:14:20,312 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 352 flow [2023-08-31 02:14:20,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-31 02:14:20,313 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-08-31 02:14:20,313 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 352 flow [2023-08-31 02:14:20,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:20,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:20,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 02:14:20,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:20,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -541050982, now seen corresponding path program 1 times [2023-08-31 02:14:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947903511] [2023-08-31 02:14:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:20,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947903511] [2023-08-31 02:14:20,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947903511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004086596] [2023-08-31 02:14:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:20,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:20,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:14:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 02:14:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:20,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:20,729 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 23 treesize of output 7 [2023-08-31 02:14:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004086596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:14:20,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:14:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 02:14:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729796943] [2023-08-31 02:14:20,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:14:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:14:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:14:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:14:21,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-31 02:14:21,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:21,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:21,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-31 02:14:21,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:21,856 INFO L130 PetriNetUnfolder]: 6213/8517 cut-off events. [2023-08-31 02:14:21,857 INFO L131 PetriNetUnfolder]: For 19639/20355 co-relation queries the response was YES. [2023-08-31 02:14:21,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30147 conditions, 8517 events. 6213/8517 cut-off events. For 19639/20355 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42354 event pairs, 3393 based on Foata normal form. 819/8092 useless extension candidates. Maximal degree in co-relation 30112. Up to 2836 conditions per place. [2023-08-31 02:14:21,906 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 117 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-08-31 02:14:21,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 917 flow [2023-08-31 02:14:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:14:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:14:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1611 transitions. [2023-08-31 02:14:21,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394736842105263 [2023-08-31 02:14:21,911 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1611 transitions. [2023-08-31 02:14:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1611 transitions. [2023-08-31 02:14:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1611 transitions. [2023-08-31 02:14:21,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.375) internal successors, (1611), 8 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:21,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:21,923 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:21,923 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 352 flow. Second operand 8 states and 1611 transitions. [2023-08-31 02:14:21,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 917 flow [2023-08-31 02:14:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 894 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-31 02:14:21,953 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 418 flow [2023-08-31 02:14:21,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-31 02:14:21,954 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-08-31 02:14:21,954 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 418 flow [2023-08-31 02:14:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:21,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:21,955 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, 1, 1, 1, 1, 1] [2023-08-31 02:14:21,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 02:14:22,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:22,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:22,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2109067920, now seen corresponding path program 2 times [2023-08-31 02:14:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15206244] [2023-08-31 02:14:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15206244] [2023-08-31 02:14:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15206244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073669640] [2023-08-31 02:14:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:14:22,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:22,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:22,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:22,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:14:22,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:14:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:14:22,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:14:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:22,620 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 202 treesize of output 198 [2023-08-31 02:14:22,737 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 18 treesize of output 20 [2023-08-31 02:14:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:22,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:22,777 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_376) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-08-31 02:14:22,790 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 41 treesize of output 25 [2023-08-31 02:14:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:22,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073669640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:14:22,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:14:22,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:14:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133624181] [2023-08-31 02:14:22,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:14:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:14:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:14:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=160, Unknown=1, NotChecked=26, Total=240 [2023-08-31 02:14:23,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 475 [2023-08-31 02:14:23,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 418 flow. Second operand has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:23,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:23,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 475 [2023-08-31 02:14:23,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:24,162 INFO L130 PetriNetUnfolder]: 6973/9575 cut-off events. [2023-08-31 02:14:24,163 INFO L131 PetriNetUnfolder]: For 26518/27290 co-relation queries the response was YES. [2023-08-31 02:14:24,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 9575 events. 6973/9575 cut-off events. For 26518/27290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 47927 event pairs, 3387 based on Foata normal form. 862/9034 useless extension candidates. Maximal degree in co-relation 35670. Up to 2833 conditions per place. [2023-08-31 02:14:24,229 INFO L137 encePairwiseOnDemand]: 455/475 looper letters, 115 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2023-08-31 02:14:24,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 163 transitions, 1175 flow [2023-08-31 02:14:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:14:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:14:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1789 transitions. [2023-08-31 02:14:24,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34239234449760764 [2023-08-31 02:14:24,235 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1789 transitions. [2023-08-31 02:14:24,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1789 transitions. [2023-08-31 02:14:24,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:24,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1789 transitions. [2023-08-31 02:14:24,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.63636363636363) internal successors, (1789), 11 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) [2023-08-31 02:14:24,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:24,247 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:24,247 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 418 flow. Second operand 11 states and 1789 transitions. [2023-08-31 02:14:24,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 163 transitions, 1175 flow [2023-08-31 02:14:24,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 163 transitions, 1134 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 02:14:24,292 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 745 flow [2023-08-31 02:14:24,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=745, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-31 02:14:24,292 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2023-08-31 02:14:24,293 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 745 flow [2023-08-31 02:14:24,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:24,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:24,294 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, 1, 1, 1, 1, 1] [2023-08-31 02:14:24,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:24,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:24,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:24,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:24,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1281398950, now seen corresponding path program 3 times [2023-08-31 02:14:24,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:24,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817471048] [2023-08-31 02:14:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:24,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:24,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817471048] [2023-08-31 02:14:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817471048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514036232] [2023-08-31 02:14:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:14:24,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:24,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:24,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:24,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:14:25,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:14:25,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:14:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 02:14:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:25,264 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 18 treesize of output 20 [2023-08-31 02:14:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:25,311 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 18 treesize of output 20 [2023-08-31 02:14:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:25,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:25,490 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 157 treesize of output 133 [2023-08-31 02:14:25,500 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 27 treesize of output 21 [2023-08-31 02:14:25,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-31 02:14:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:14:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514036232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:14:25,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:14:25,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-31 02:14:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418306088] [2023-08-31 02:14:25,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:14:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:14:25,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:14:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:14:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=340, Unknown=6, NotChecked=0, Total=420 [2023-08-31 02:14:27,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:29,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:32,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:34,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:36,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:38,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:40,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:42,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:44,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:46,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:48,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:50,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:52,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:54,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:56,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:14:56,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 475 [2023-08-31 02:14:56,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 745 flow. Second operand has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:56,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:14:56,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 475 [2023-08-31 02:14:56,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:14:57,959 INFO L130 PetriNetUnfolder]: 6365/8790 cut-off events. [2023-08-31 02:14:57,959 INFO L131 PetriNetUnfolder]: For 30415/31227 co-relation queries the response was YES. [2023-08-31 02:14:57,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43737 conditions, 8790 events. 6365/8790 cut-off events. For 30415/31227 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 43279 event pairs, 3098 based on Foata normal form. 828/8345 useless extension candidates. Maximal degree in co-relation 43697. Up to 4927 conditions per place. [2023-08-31 02:14:58,012 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 144 selfloop transitions, 18 changer transitions 0/164 dead transitions. [2023-08-31 02:14:58,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 1516 flow [2023-08-31 02:14:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 02:14:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 02:14:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1434 transitions. [2023-08-31 02:14:58,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3354385964912281 [2023-08-31 02:14:58,017 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1434 transitions. [2023-08-31 02:14:58,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1434 transitions. [2023-08-31 02:14:58,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:14:58,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1434 transitions. [2023-08-31 02:14:58,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:58,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:58,027 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:58,027 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 745 flow. Second operand 9 states and 1434 transitions. [2023-08-31 02:14:58,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 1516 flow [2023-08-31 02:14:58,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 164 transitions, 1481 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-31 02:14:58,088 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 769 flow [2023-08-31 02:14:58,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2023-08-31 02:14:58,089 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-31 02:14:58,089 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 769 flow [2023-08-31 02:14:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:14:58,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:14:58,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:14:58,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:14:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 02:14:58,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:14:58,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:14:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -935293517, now seen corresponding path program 1 times [2023-08-31 02:14:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:14:58,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386430790] [2023-08-31 02:14:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:14:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:14:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:14:59,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386430790] [2023-08-31 02:14:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386430790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:14:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340772549] [2023-08-31 02:14:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:14:59,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:14:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:14:59,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:14:59,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:14:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:14:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 02:14:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:14:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:14:59,540 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 [2023-08-31 02:14:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:14:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:14:59,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:14:59,790 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 41 treesize of output 33 [2023-08-31 02:14:59,795 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 9 treesize of output 3 [2023-08-31 02:15:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:15:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340772549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:15:00,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:15:00,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-08-31 02:15:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278723817] [2023-08-31 02:15:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:15:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 02:15:00,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:15:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 02:15:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1073, Unknown=7, NotChecked=0, Total=1190 [2023-08-31 02:15:03,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 475 [2023-08-31 02:15:03,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 769 flow. Second operand has 35 states, 35 states have (on average 160.0) internal successors, (5600), 35 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:03,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:15:03,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 475 [2023-08-31 02:15:03,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:15:09,622 INFO L130 PetriNetUnfolder]: 31908/44015 cut-off events. [2023-08-31 02:15:09,622 INFO L131 PetriNetUnfolder]: For 175182/175182 co-relation queries the response was YES. [2023-08-31 02:15:09,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226008 conditions, 44015 events. 31908/44015 cut-off events. For 175182/175182 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 262203 event pairs, 4911 based on Foata normal form. 168/39387 useless extension candidates. Maximal degree in co-relation 154010. Up to 21286 conditions per place. [2023-08-31 02:15:09,965 INFO L137 encePairwiseOnDemand]: 457/475 looper letters, 786 selfloop transitions, 276 changer transitions 100/1162 dead transitions. [2023-08-31 02:15:09,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1162 transitions, 12168 flow [2023-08-31 02:15:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 02:15:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 02:15:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6000 transitions. [2023-08-31 02:15:09,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3609022556390977 [2023-08-31 02:15:09,988 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6000 transitions. [2023-08-31 02:15:09,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6000 transitions. [2023-08-31 02:15:09,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:15:09,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6000 transitions. [2023-08-31 02:15:10,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 171.42857142857142) internal successors, (6000), 35 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:10,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 475.0) internal successors, (17100), 36 states have internal predecessors, (17100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:10,027 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 475.0) internal successors, (17100), 36 states have internal predecessors, (17100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:10,027 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 769 flow. Second operand 35 states and 6000 transitions. [2023-08-31 02:15:10,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 1162 transitions, 12168 flow [2023-08-31 02:15:10,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 1162 transitions, 11721 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-08-31 02:15:10,710 INFO L231 Difference]: Finished difference. Result has 129 places, 379 transitions, 4930 flow [2023-08-31 02:15:10,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4930, PETRI_PLACES=129, PETRI_TRANSITIONS=379} [2023-08-31 02:15:10,712 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2023-08-31 02:15:10,713 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 379 transitions, 4930 flow [2023-08-31 02:15:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 160.0) internal successors, (5600), 35 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:10,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:15:10,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:15:10,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:15:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:10,920 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:15:10,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:15:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash 792253339, now seen corresponding path program 2 times [2023-08-31 02:15:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:15:10,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520358485] [2023-08-31 02:15:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:15:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:15:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:15:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:15:11,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:15:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520358485] [2023-08-31 02:15:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520358485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:15:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775481410] [2023-08-31 02:15:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:15:11,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:15:11,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:15:11,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:15:11,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:15:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:15:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 02:15:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:15:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:15:12,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:15:12,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:15:12,260 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 15 [2023-08-31 02:15:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:15:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775481410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:15:12,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:15:12,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2023-08-31 02:15:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214393366] [2023-08-31 02:15:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:15:12,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:15:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:15:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:15:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:15:15,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-08-31 02:15:15,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 379 transitions, 4930 flow. Second operand has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:15,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:15:15,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-08-31 02:15:15,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:15:23,799 INFO L130 PetriNetUnfolder]: 25996/36333 cut-off events. [2023-08-31 02:15:23,799 INFO L131 PetriNetUnfolder]: For 464866/464866 co-relation queries the response was YES. [2023-08-31 02:15:24,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249685 conditions, 36333 events. 25996/36333 cut-off events. For 464866/464866 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 216636 event pairs, 6040 based on Foata normal form. 1475/37712 useless extension candidates. Maximal degree in co-relation 228937. Up to 17769 conditions per place. [2023-08-31 02:15:24,236 INFO L137 encePairwiseOnDemand]: 457/475 looper letters, 657 selfloop transitions, 464 changer transitions 392/1513 dead transitions. [2023-08-31 02:15:24,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1513 transitions, 22595 flow [2023-08-31 02:15:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-31 02:15:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-31 02:15:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 10858 transitions. [2023-08-31 02:15:24,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38098245614035087 [2023-08-31 02:15:24,250 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 10858 transitions. [2023-08-31 02:15:24,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 10858 transitions. [2023-08-31 02:15:24,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:15:24,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 10858 transitions. [2023-08-31 02:15:24,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 180.96666666666667) internal successors, (10858), 60 states have internal predecessors, (10858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:24,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:24,295 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:24,296 INFO L175 Difference]: Start difference. First operand has 129 places, 379 transitions, 4930 flow. Second operand 60 states and 10858 transitions. [2023-08-31 02:15:24,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1513 transitions, 22595 flow [2023-08-31 02:15:27,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1513 transitions, 21920 flow, removed 171 selfloop flow, removed 3 redundant places. [2023-08-31 02:15:27,396 INFO L231 Difference]: Finished difference. Result has 230 places, 745 transitions, 10898 flow [2023-08-31 02:15:27,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=10898, PETRI_PLACES=230, PETRI_TRANSITIONS=745} [2023-08-31 02:15:27,397 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 194 predicate places. [2023-08-31 02:15:27,397 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 745 transitions, 10898 flow [2023-08-31 02:15:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:27,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:15:27,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:15:27,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:15:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:27,599 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:15:27,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:15:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1301806927, now seen corresponding path program 3 times [2023-08-31 02:15:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:15:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715078299] [2023-08-31 02:15:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:15:27,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:15:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:15:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:15:28,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:15:28,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715078299] [2023-08-31 02:15:28,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715078299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:15:28,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142601253] [2023-08-31 02:15:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:15:28,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:15:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:15:28,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:15:28,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:15:29,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:15:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:15:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:15:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:15:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:15:29,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:15:29,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:15:29,564 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 15 [2023-08-31 02:15:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:15:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142601253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:15:29,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:15:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 33 [2023-08-31 02:15:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778452931] [2023-08-31 02:15:29,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:15:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 02:15:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:15:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 02:15:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 02:15:35,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 475 [2023-08-31 02:15:35,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 745 transitions, 10898 flow. Second operand has 33 states, 33 states have (on average 171.3939393939394) internal successors, (5656), 33 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:35,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:15:35,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 475 [2023-08-31 02:15:35,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:15:54,695 INFO L130 PetriNetUnfolder]: 44590/61105 cut-off events. [2023-08-31 02:15:54,695 INFO L131 PetriNetUnfolder]: For 1568232/1568232 co-relation queries the response was YES. [2023-08-31 02:15:55,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511727 conditions, 61105 events. 44590/61105 cut-off events. For 1568232/1568232 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 375892 event pairs, 5383 based on Foata normal form. 140/61005 useless extension candidates. Maximal degree in co-relation 499692. Up to 23264 conditions per place. [2023-08-31 02:15:56,319 INFO L137 encePairwiseOnDemand]: 456/475 looper letters, 1954 selfloop transitions, 1759 changer transitions 112/3825 dead transitions. [2023-08-31 02:15:56,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 3825 transitions, 67086 flow [2023-08-31 02:15:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-31 02:15:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-31 02:15:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 9811 transitions. [2023-08-31 02:15:56,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37554066985645934 [2023-08-31 02:15:56,333 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 9811 transitions. [2023-08-31 02:15:56,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 9811 transitions. [2023-08-31 02:15:56,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:15:56,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 9811 transitions. [2023-08-31 02:15:56,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 178.38181818181818) internal successors, (9811), 55 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:56,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 475.0) internal successors, (26600), 56 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:56,383 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 475.0) internal successors, (26600), 56 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:15:56,384 INFO L175 Difference]: Start difference. First operand has 230 places, 745 transitions, 10898 flow. Second operand 55 states and 9811 transitions. [2023-08-31 02:15:56,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 3825 transitions, 67086 flow [2023-08-31 02:16:26,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3825 transitions, 57142 flow, removed 4968 selfloop flow, removed 3 redundant places. [2023-08-31 02:16:26,730 INFO L231 Difference]: Finished difference. Result has 322 places, 2170 transitions, 35936 flow [2023-08-31 02:16:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=9177, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=35936, PETRI_PLACES=322, PETRI_TRANSITIONS=2170} [2023-08-31 02:16:26,731 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 286 predicate places. [2023-08-31 02:16:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 2170 transitions, 35936 flow [2023-08-31 02:16:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 171.3939393939394) internal successors, (5656), 33 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:16:26,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 02:16:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:16:26,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:16:26,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1482880989, now seen corresponding path program 4 times [2023-08-31 02:16:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:26,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131984618] [2023-08-31 02:16:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:16:28,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:28,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131984618] [2023-08-31 02:16:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131984618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:16:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595648899] [2023-08-31 02:16:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:16:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:16:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:16:28,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:16:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:16:28,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:16:28,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:16:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-31 02:16:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:16:28,439 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:16:28,439 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 11 [2023-08-31 02:16:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:16:28,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:16:28,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:16:28,678 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 15 [2023-08-31 02:16:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:16:28,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595648899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:16:28,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:16:28,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-08-31 02:16:28,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129359508] [2023-08-31 02:16:28,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:16:28,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:16:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:16:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:16:31,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-08-31 02:16:31,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 2170 transitions, 35936 flow. Second operand has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:31,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:31,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-08-31 02:16:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:17:39,556 INFO L130 PetriNetUnfolder]: 108057/147857 cut-off events. [2023-08-31 02:17:39,556 INFO L131 PetriNetUnfolder]: For 5791824/5795982 co-relation queries the response was YES. [2023-08-31 02:17:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438355 conditions, 147857 events. 108057/147857 cut-off events. For 5791824/5795982 co-relation queries the response was YES. Maximal size of possible extension queue 6031. Compared 1015934 event pairs, 6043 based on Foata normal form. 1653/148914 useless extension candidates. Maximal degree in co-relation 1432442. Up to 55331 conditions per place. [2023-08-31 02:17:45,208 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 2300 selfloop transitions, 6107 changer transitions 0/8587 dead transitions. [2023-08-31 02:17:45,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 8587 transitions, 160663 flow [2023-08-31 02:17:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-31 02:17:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-31 02:17:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 18230 transitions. [2023-08-31 02:17:45,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837894736842105 [2023-08-31 02:17:45,227 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 18230 transitions. [2023-08-31 02:17:45,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 18230 transitions. [2023-08-31 02:17:45,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:17:45,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 18230 transitions. [2023-08-31 02:17:45,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 182.3) internal successors, (18230), 100 states have internal predecessors, (18230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:45,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:45,298 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:45,298 INFO L175 Difference]: Start difference. First operand has 322 places, 2170 transitions, 35936 flow. Second operand 100 states and 18230 transitions. [2023-08-31 02:17:45,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 8587 transitions, 160663 flow [2023-08-31 02:22:11,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 8587 transitions, 155861 flow, removed 2398 selfloop flow, removed 3 redundant places. [2023-08-31 02:22:11,461 INFO L231 Difference]: Finished difference. Result has 483 places, 7014 transitions, 140745 flow [2023-08-31 02:22:11,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=34614, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=140745, PETRI_PLACES=483, PETRI_TRANSITIONS=7014} [2023-08-31 02:22:11,465 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 447 predicate places. [2023-08-31 02:22:11,466 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 7014 transitions, 140745 flow [2023-08-31 02:22:11,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:11,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:22:11,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:22:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:22:11,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 02:22:11,668 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:22:11,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:22:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash -638234615, now seen corresponding path program 5 times [2023-08-31 02:22:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:22:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118351993] [2023-08-31 02:22:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:22:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:22:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:22:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:22:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:22:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118351993] [2023-08-31 02:22:13,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118351993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:22:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6817449] [2023-08-31 02:22:13,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:22:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:22:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:22:13,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:22:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:22:13,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 02:22:13,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:22:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 02:22:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:22:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:22:13,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:22:13,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:22:13,629 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 15 [2023-08-31 02:22:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:22:14,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6817449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:22:14,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:22:14,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 35 [2023-08-31 02:22:14,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754852376] [2023-08-31 02:22:14,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:22:14,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 02:22:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:22:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 02:22:14,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2023-08-31 02:22:19,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 475 [2023-08-31 02:22:19,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 7014 transitions, 140745 flow. Second operand has 36 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:19,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:22:19,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 475 [2023-08-31 02:22:19,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:26:29,506 INFO L130 PetriNetUnfolder]: 131821/180878 cut-off events. [2023-08-31 02:26:29,506 INFO L131 PetriNetUnfolder]: For 8192681/8192681 co-relation queries the response was YES. [2023-08-31 02:26:38,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966760 conditions, 180878 events. 131821/180878 cut-off events. For 8192681/8192681 co-relation queries the response was YES. Maximal size of possible extension queue 7082. Compared 1265372 event pairs, 13797 based on Foata normal form. 1136/182014 useless extension candidates. Maximal degree in co-relation 1957546. Up to 64446 conditions per place. [2023-08-31 02:26:39,876 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 4847 selfloop transitions, 7375 changer transitions 0/12222 dead transitions. [2023-08-31 02:26:39,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 12222 transitions, 270775 flow [2023-08-31 02:26:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-31 02:26:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-31 02:26:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 11122 transitions. [2023-08-31 02:26:39,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602267206477733 [2023-08-31 02:26:39,888 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 11122 transitions. [2023-08-31 02:26:39,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 11122 transitions. [2023-08-31 02:26:39,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:26:39,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 11122 transitions. [2023-08-31 02:26:39,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 171.1076923076923) internal successors, (11122), 65 states have internal predecessors, (11122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:39,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:39,928 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:39,928 INFO L175 Difference]: Start difference. First operand has 483 places, 7014 transitions, 140745 flow. Second operand 65 states and 11122 transitions. [2023-08-31 02:26:39,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 12222 transitions, 270775 flow Killed by 15