./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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 ../sv-benchmarks/c/weaver/popl20-more-multiply-verify.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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:10:41,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:10:41,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:10:41,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:10:41,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:10:41,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:10:41,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:10:41,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:10:41,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:10:41,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:10:41,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:10:41,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:10:41,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:10:41,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:10:41,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:10:41,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:10:41,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:10:41,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:10:41,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:10:41,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:10:41,776 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:10:41,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:10:41,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:10:41,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:10:41,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:10:41,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:10:41,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:10:41,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:10:41,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:10:41,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:10:41,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:10:41,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:10:41,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:10:41,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:10:41,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:10:41,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:10:41,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:10:41,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:10:41,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:10:41,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:10:41,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:10:41,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:10:41,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:10:41,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:10:41,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:10:41,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:10:41,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:10:41,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:10:41,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:10:41,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:10:41,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:10:41,822 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:10:41,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:10:41,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:10:41,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:10:41,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:10:41,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:10:41,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:10:41,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:10:41,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:10:41,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:10:41,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:10:41,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:41,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:10:41,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:10:41,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:10:41,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-07-21 09:10:42,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:10:42,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:10:42,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:10:42,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:10:42,081 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:10:42,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-21 09:10:42,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bb3139b/ab28db4f88ca4658afc3ba8b3d258ae0/FLAG1c8291a27 [2022-07-21 09:10:42,519 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:10:42,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-07-21 09:10:42,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bb3139b/ab28db4f88ca4658afc3ba8b3d258ae0/FLAG1c8291a27 [2022-07-21 09:10:42,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bb3139b/ab28db4f88ca4658afc3ba8b3d258ae0 [2022-07-21 09:10:42,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:10:42,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:10:42,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:42,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:10:42,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:10:42,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56caf4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42, skipping insertion in model container [2022-07-21 09:10:42,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:10:42,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:10:42,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-21 09:10:42,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:42,753 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:10:42,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-07-21 09:10:42,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:10:42,800 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:10:42,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42 WrapperNode [2022-07-21 09:10:42,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:10:42,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:42,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:10:42,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:10:42,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,847 INFO L137 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-07-21 09:10:42,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:10:42,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:10:42,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:10:42,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:10:42,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:10:42,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:10:42,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:10:42,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:10:42,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (1/1) ... [2022-07-21 09:10:42,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:10:42,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:42,933 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) [2022-07-21 09:10:42,953 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 [2022-07-21 09:10:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:10:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:10:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:10:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:10:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:10:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:10:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:10:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:10:42,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:10:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:10:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:10:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:10:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:10:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:10:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:10:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:10:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:10:42,970 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:10:43,030 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:10:43,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:10:43,284 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:10:43,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:10:43,390 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:10:43,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:43 BoogieIcfgContainer [2022-07-21 09:10:43,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:10:43,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:10:43,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:10:43,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:10:43,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:10:42" (1/3) ... [2022-07-21 09:10:43,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647d6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:43, skipping insertion in model container [2022-07-21 09:10:43,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:10:42" (2/3) ... [2022-07-21 09:10:43,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647d6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:10:43, skipping insertion in model container [2022-07-21 09:10:43,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:10:43" (3/3) ... [2022-07-21 09:10:43,398 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-07-21 09:10:43,402 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:10:43,407 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:10:43,407 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:10:43,408 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:10:43,481 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:10:43,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-07-21 09:10:43,587 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-21 09:10:43,587 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:10:43,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-07-21 09:10:43,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-07-21 09:10:43,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-07-21 09:10:43,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:10:43,613 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@126e0be5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ccd156d [2022-07-21 09:10:43,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:10:43,649 INFO L129 PetriNetUnfolder]: 9/139 cut-off events. [2022-07-21 09:10:43,652 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:10:43,652 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:43,653 INFO L200 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, 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, 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, 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] [2022-07-21 09:10:43,653 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)] === [2022-07-21 09:10:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1039110471, now seen corresponding path program 1 times [2022-07-21 09:10:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889874669] [2022-07-21 09:10:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:43,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889874669] [2022-07-21 09:10:43,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889874669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:43,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:43,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:10:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544138172] [2022-07-21 09:10:43,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:43,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:10:43,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:10:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:10:43,928 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-07-21 09:10:43,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:43,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:43,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-07-21 09:10:43,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:44,006 INFO L129 PetriNetUnfolder]: 18/215 cut-off events. [2022-07-21 09:10:44,007 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 09:10:44,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-07-21 09:10:44,011 INFO L132 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-07-21 09:10:44,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-07-21 09:10:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:10:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:10:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-21 09:10:44,022 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-07-21 09:10:44,023 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-21 09:10:44,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-21 09:10:44,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:44,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-21 09:10:44,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,038 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,039 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-07-21 09:10:44,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-07-21 09:10:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:10:44,046 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-07-21 09:10:44,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-07-21 09:10:44,052 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-07-21 09:10:44,053 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-07-21 09:10:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:44,053 INFO L200 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, 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, 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, 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] [2022-07-21 09:10:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:10:44,054 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)] === [2022-07-21 09:10:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash 401544920, now seen corresponding path program 1 times [2022-07-21 09:10:44,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572282849] [2022-07-21 09:10:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:44,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:44,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:44,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572282849] [2022-07-21 09:10:44,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572282849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:44,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:10:44,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:10:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637080954] [2022-07-21 09:10:44,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:10:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:10:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:10:44,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-07-21 09:10:44,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:44,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-07-21 09:10:44,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:44,326 INFO L129 PetriNetUnfolder]: 20/259 cut-off events. [2022-07-21 09:10:44,327 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 09:10:44,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 616 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-07-21 09:10:44,329 INFO L132 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-07-21 09:10:44,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-07-21 09:10:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:10:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:10:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-07-21 09:10:44,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-07-21 09:10:44,335 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-07-21 09:10:44,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-07-21 09:10:44,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:44,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-07-21 09:10:44,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,342 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,342 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-07-21 09:10:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-07-21 09:10:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:10:44,348 INFO L242 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-07-21 09:10:44,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-07-21 09:10:44,349 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-21 09:10:44,349 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-07-21 09:10:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:44,350 INFO L200 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:10:44,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:10:44,351 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)] === [2022-07-21 09:10:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2022-07-21 09:10:44,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:44,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547220471] [2022-07-21 09:10:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547220471] [2022-07-21 09:10:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547220471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088776518] [2022-07-21 09:10:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:44,550 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) [2022-07-21 09:10:44,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:10:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:44,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:10:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:44,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088776518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:10:44,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:10:44,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-07-21 09:10:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947220959] [2022-07-21 09:10:44,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:10:44,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:10:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:10:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:10:44,974 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-07-21 09:10:44,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:44,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:44,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-07-21 09:10:44,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:45,153 INFO L129 PetriNetUnfolder]: 24/300 cut-off events. [2022-07-21 09:10:45,153 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-21 09:10:45,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 858 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-07-21 09:10:45,155 INFO L132 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2022-07-21 09:10:45,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2022-07-21 09:10:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:10:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:10:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2022-07-21 09:10:45,158 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2022-07-21 09:10:45,158 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2022-07-21 09:10:45,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2022-07-21 09:10:45,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:45,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2022-07-21 09:10:45,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:45,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:45,165 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:45,166 INFO L186 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2022-07-21 09:10:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2022-07-21 09:10:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:10:45,168 INFO L242 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2022-07-21 09:10:45,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2022-07-21 09:10:45,169 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2022-07-21 09:10:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2022-07-21 09:10:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:45,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:45,171 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:10:45,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:45,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:45,394 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)] === [2022-07-21 09:10:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash -807681704, now seen corresponding path program 2 times [2022-07-21 09:10:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:45,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506378333] [2022-07-21 09:10:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:45,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:47,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506378333] [2022-07-21 09:10:47,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506378333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013740148] [2022-07-21 09:10:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:10:47,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:47,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:47,787 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) [2022-07-21 09:10:47,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:10:47,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:10:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:47,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 09:10:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:48,308 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:10:48,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:10:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:10:48,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:10:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013740148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:48,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:10:48,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-21 09:10:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798026514] [2022-07-21 09:10:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:48,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:10:48,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:10:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 09:10:48,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-21 09:10:48,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:48,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-21 09:10:48,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:48,914 INFO L129 PetriNetUnfolder]: 424/1101 cut-off events. [2022-07-21 09:10:48,915 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-21 09:10:48,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 1101 events. 424/1101 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6095 event pairs, 139 based on Foata normal form. 35/1083 useless extension candidates. Maximal degree in co-relation 2332. Up to 500 conditions per place. [2022-07-21 09:10:48,921 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-07-21 09:10:48,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 804 flow [2022-07-21 09:10:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:10:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:10:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-07-21 09:10:48,929 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-07-21 09:10:48,929 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-07-21 09:10:48,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-07-21 09:10:48,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:48,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-07-21 09:10:48,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,935 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,935 INFO L186 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1400 transitions. [2022-07-21 09:10:48,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 804 flow [2022-07-21 09:10:48,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-07-21 09:10:48,940 INFO L242 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-07-21 09:10:48,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-07-21 09:10:48,941 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-07-21 09:10:48,941 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-07-21 09:10:48,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:48,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:48,942 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:10:48,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:49,156 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,SelfDestructingSolverStorable3 [2022-07-21 09:10:49,156 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)] === [2022-07-21 09:10:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1998262026, now seen corresponding path program 3 times [2022-07-21 09:10:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022709185] [2022-07-21 09:10:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:49,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022709185] [2022-07-21 09:10:51,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022709185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285198582] [2022-07-21 09:10:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:10:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:51,104 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) [2022-07-21 09:10:51,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:10:51,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 09:10:51,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:10:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:10:51,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-21 09:10:51,988 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:10:51,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:10:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:10:52,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:10:52,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285198582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:10:52,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:10:52,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-07-21 09:10:52,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811000409] [2022-07-21 09:10:52,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:10:52,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:10:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:10:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:10:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:10:52,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:10:52,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:52,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:10:52,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:10:52,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:10:53,158 INFO L129 PetriNetUnfolder]: 570/1363 cut-off events. [2022-07-21 09:10:53,159 INFO L130 PetriNetUnfolder]: For 1556/1654 co-relation queries the response was YES. [2022-07-21 09:10:53,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1363 events. 570/1363 cut-off events. For 1556/1654 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7708 event pairs, 149 based on Foata normal form. 30/1328 useless extension candidates. Maximal degree in co-relation 3527. Up to 656 conditions per place. [2022-07-21 09:10:53,167 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 83 selfloop transitions, 28 changer transitions 37/225 dead transitions. [2022-07-21 09:10:53,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 1051 flow [2022-07-21 09:10:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:10:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:10:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-21 09:10:53,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-21 09:10:53,171 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-21 09:10:53,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-21 09:10:53,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:10:53,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-21 09:10:53,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,179 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,179 INFO L186 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 21 states and 1877 transitions. [2022-07-21 09:10:53,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 1051 flow [2022-07-21 09:10:53,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 1003 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-07-21 09:10:53,185 INFO L242 Difference]: Finished difference. Result has 187 places, 166 transitions, 634 flow [2022-07-21 09:10:53,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=634, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2022-07-21 09:10:53,186 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 46 predicate places. [2022-07-21 09:10:53,186 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 634 flow [2022-07-21 09:10:53,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:10:53,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:10:53,187 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:10:53,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:10:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:53,407 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)] === [2022-07-21 09:10:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:10:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -776477366, now seen corresponding path program 4 times [2022-07-21 09:10:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:10:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989412241] [2022-07-21 09:10:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:10:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:10:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:10:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:10:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989412241] [2022-07-21 09:10:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989412241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:10:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105886898] [2022-07-21 09:10:55,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:10:55,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:10:55,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:10:55,833 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) [2022-07-21 09:10:55,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:10:55,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:10:55,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:10:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 09:10:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:10:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:10:56,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-21 09:10:57,255 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:10:57,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:10:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:10:57,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:10:58,161 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:10:58,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 126 [2022-07-21 09:10:58,191 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-21 09:10:58,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 60 [2022-07-21 09:11:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:00,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105886898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:00,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:00,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28, 28] total 87 [2022-07-21 09:11:00,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299929850] [2022-07-21 09:11:00,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:00,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-21 09:11:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-21 09:11:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=7120, Unknown=3, NotChecked=0, Total=7482 [2022-07-21 09:11:00,026 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-21 09:11:00,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 634 flow. Second operand has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:00,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:00,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-21 09:11:00,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:19,417 INFO L129 PetriNetUnfolder]: 2127/5197 cut-off events. [2022-07-21 09:11:19,417 INFO L130 PetriNetUnfolder]: For 9739/9893 co-relation queries the response was YES. [2022-07-21 09:11:19,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14737 conditions, 5197 events. 2127/5197 cut-off events. For 9739/9893 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 42931 event pairs, 408 based on Foata normal form. 71/5079 useless extension candidates. Maximal degree in co-relation 14710. Up to 676 conditions per place. [2022-07-21 09:11:19,451 INFO L132 encePairwiseOnDemand]: 108/154 looper letters, 339 selfloop transitions, 123 changer transitions 80/599 dead transitions. [2022-07-21 09:11:19,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 599 transitions, 3640 flow [2022-07-21 09:11:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 09:11:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-21 09:11:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5298 transitions. [2022-07-21 09:11:19,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4587012987012987 [2022-07-21 09:11:19,509 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5298 transitions. [2022-07-21 09:11:19,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5298 transitions. [2022-07-21 09:11:19,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:19,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5298 transitions. [2022-07-21 09:11:19,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 70.64) internal successors, (5298), 75 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:19,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:19,531 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:19,531 INFO L186 Difference]: Start difference. First operand has 187 places, 166 transitions, 634 flow. Second operand 75 states and 5298 transitions. [2022-07-21 09:11:19,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 599 transitions, 3640 flow [2022-07-21 09:11:19,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 599 transitions, 3372 flow, removed 123 selfloop flow, removed 15 redundant places. [2022-07-21 09:11:19,555 INFO L242 Difference]: Finished difference. Result has 280 places, 254 transitions, 1647 flow [2022-07-21 09:11:19,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1647, PETRI_PLACES=280, PETRI_TRANSITIONS=254} [2022-07-21 09:11:19,556 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 139 predicate places. [2022-07-21 09:11:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 254 transitions, 1647 flow [2022-07-21 09:11:19,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 66.35632183908046) internal successors, (5773), 87 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:19,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:19,558 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:11:19,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:19,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:19,775 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)] === [2022-07-21 09:11:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash -708962460, now seen corresponding path program 5 times [2022-07-21 09:11:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627801558] [2022-07-21 09:11:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:19,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:21,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:21,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627801558] [2022-07-21 09:11:21,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627801558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:21,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657456399] [2022-07-21 09:11:21,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:11:21,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:21,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:21,643 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) [2022-07-21 09:11:21,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:11:21,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:11:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:21,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 09:11:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:21,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:11:21,929 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:11:21,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:11:22,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-07-21 09:11:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:23,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:11:23,179 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:23,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2022-07-21 09:11:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:23,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:24,112 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-21 09:11:24,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 202 [2022-07-21 09:11:24,125 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:11:24,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2022-07-21 09:11:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:27,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657456399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:27,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:27,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 28] total 85 [2022-07-21 09:11:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863350856] [2022-07-21 09:11:27,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:27,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 09:11:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 09:11:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=6737, Unknown=1, NotChecked=0, Total=7140 [2022-07-21 09:11:27,144 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-21 09:11:27,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 254 transitions, 1647 flow. Second operand has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:27,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:27,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-21 09:11:27,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:35,715 INFO L129 PetriNetUnfolder]: 2301/5537 cut-off events. [2022-07-21 09:11:35,715 INFO L130 PetriNetUnfolder]: For 29019/29222 co-relation queries the response was YES. [2022-07-21 09:11:35,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20882 conditions, 5537 events. 2301/5537 cut-off events. For 29019/29222 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 46305 event pairs, 616 based on Foata normal form. 48/5352 useless extension candidates. Maximal degree in co-relation 20822. Up to 1257 conditions per place. [2022-07-21 09:11:35,763 INFO L132 encePairwiseOnDemand]: 110/154 looper letters, 224 selfloop transitions, 129 changer transitions 18/428 dead transitions. [2022-07-21 09:11:35,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 3597 flow [2022-07-21 09:11:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:11:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:11:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3595 transitions. [2022-07-21 09:11:35,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4489260739260739 [2022-07-21 09:11:35,767 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3595 transitions. [2022-07-21 09:11:35,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3595 transitions. [2022-07-21 09:11:35,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:35,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3595 transitions. [2022-07-21 09:11:35,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 69.13461538461539) internal successors, (3595), 52 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:35,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:35,784 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:35,784 INFO L186 Difference]: Start difference. First operand has 280 places, 254 transitions, 1647 flow. Second operand 52 states and 3595 transitions. [2022-07-21 09:11:35,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 3597 flow [2022-07-21 09:11:35,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 428 transitions, 3142 flow, removed 188 selfloop flow, removed 34 redundant places. [2022-07-21 09:11:35,855 INFO L242 Difference]: Finished difference. Result has 297 places, 289 transitions, 2055 flow [2022-07-21 09:11:35,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2055, PETRI_PLACES=297, PETRI_TRANSITIONS=289} [2022-07-21 09:11:35,857 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 156 predicate places. [2022-07-21 09:11:35,857 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 289 transitions, 2055 flow [2022-07-21 09:11:35,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 66.41176470588235) internal successors, (5645), 85 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:35,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:35,859 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:11:35,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:36,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:36,065 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)] === [2022-07-21 09:11:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1006525896, now seen corresponding path program 6 times [2022-07-21 09:11:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926297565] [2022-07-21 09:11:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:36,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926297565] [2022-07-21 09:11:38,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926297565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242441535] [2022-07-21 09:11:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:11:38,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:38,011 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) [2022-07-21 09:11:38,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:11:38,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-21 09:11:38,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:11:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:11:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:38,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:38,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-07-21 09:11:38,919 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:11:38,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:11:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:11:39,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:11:39,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242441535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:11:39,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:11:39,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [36] total 51 [2022-07-21 09:11:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044291156] [2022-07-21 09:11:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:11:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:11:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:11:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 09:11:39,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:11:39,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 289 transitions, 2055 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:39,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:39,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:11:39,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:11:40,704 INFO L129 PetriNetUnfolder]: 2206/5417 cut-off events. [2022-07-21 09:11:40,705 INFO L130 PetriNetUnfolder]: For 33097/33297 co-relation queries the response was YES. [2022-07-21 09:11:40,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 5417 events. 2206/5417 cut-off events. For 33097/33297 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 46047 event pairs, 758 based on Foata normal form. 78/5240 useless extension candidates. Maximal degree in co-relation 20411. Up to 3035 conditions per place. [2022-07-21 09:11:40,750 INFO L132 encePairwiseOnDemand]: 130/154 looper letters, 156 selfloop transitions, 61 changer transitions 49/353 dead transitions. [2022-07-21 09:11:40,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 353 transitions, 2934 flow [2022-07-21 09:11:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:11:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:11:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-07-21 09:11:40,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-07-21 09:11:40,753 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-07-21 09:11:40,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-07-21 09:11:40,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:11:40,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-07-21 09:11:40,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,758 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,758 INFO L186 Difference]: Start difference. First operand has 297 places, 289 transitions, 2055 flow. Second operand 21 states and 1880 transitions. [2022-07-21 09:11:40,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 353 transitions, 2934 flow [2022-07-21 09:11:40,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 353 transitions, 2758 flow, removed 32 selfloop flow, removed 37 redundant places. [2022-07-21 09:11:40,839 INFO L242 Difference]: Finished difference. Result has 284 places, 280 transitions, 2020 flow [2022-07-21 09:11:40,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2020, PETRI_PLACES=284, PETRI_TRANSITIONS=280} [2022-07-21 09:11:40,840 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 143 predicate places. [2022-07-21 09:11:40,840 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 280 transitions, 2020 flow [2022-07-21 09:11:40,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:40,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:11:40,841 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:11:40,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:11:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:41,074 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)] === [2022-07-21 09:11:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:11:41,075 INFO L85 PathProgramCache]: Analyzing trace with hash -945882872, now seen corresponding path program 7 times [2022-07-21 09:11:41,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:11:41,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625000070] [2022-07-21 09:11:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:11:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:11:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:42,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:11:42,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625000070] [2022-07-21 09:11:42,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625000070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:11:42,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54223037] [2022-07-21 09:11:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:11:42,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:11:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:11:42,532 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) [2022-07-21 09:11:42,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:11:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:11:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 09:11:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:11:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:43,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-21 09:11:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:43,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-21 09:11:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:11:44,196 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:11:44,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-21 09:11:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:44,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:11:45,112 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:11:45,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 608 treesize of output 566 [2022-07-21 09:11:45,139 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-21 09:11:45,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 400 [2022-07-21 09:11:45,169 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-07-21 09:11:45,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 334 [2022-07-21 09:11:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:11:49,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54223037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:11:49,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:11:49,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 84 [2022-07-21 09:11:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859492031] [2022-07-21 09:11:49,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:11:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-21 09:11:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:11:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-21 09:11:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=6525, Unknown=3, NotChecked=0, Total=6972 [2022-07-21 09:11:49,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-21 09:11:49,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 280 transitions, 2020 flow. Second operand has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:11:49,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:11:49,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-21 09:11:49,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:01,712 INFO L129 PetriNetUnfolder]: 2737/6656 cut-off events. [2022-07-21 09:12:01,712 INFO L130 PetriNetUnfolder]: For 52664/53025 co-relation queries the response was YES. [2022-07-21 09:12:01,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27892 conditions, 6656 events. 2737/6656 cut-off events. For 52664/53025 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 58719 event pairs, 408 based on Foata normal form. 132/6518 useless extension candidates. Maximal degree in co-relation 27826. Up to 908 conditions per place. [2022-07-21 09:12:01,781 INFO L132 encePairwiseOnDemand]: 114/154 looper letters, 351 selfloop transitions, 155 changer transitions 81/647 dead transitions. [2022-07-21 09:12:01,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 647 transitions, 5867 flow [2022-07-21 09:12:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:12:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:12:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5011 transitions. [2022-07-21 09:12:01,786 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4785141329258976 [2022-07-21 09:12:01,786 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5011 transitions. [2022-07-21 09:12:01,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5011 transitions. [2022-07-21 09:12:01,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:01,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5011 transitions. [2022-07-21 09:12:01,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.69117647058823) internal successors, (5011), 68 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:01,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:01,800 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:01,800 INFO L186 Difference]: Start difference. First operand has 284 places, 280 transitions, 2020 flow. Second operand 68 states and 5011 transitions. [2022-07-21 09:12:01,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 647 transitions, 5867 flow [2022-07-21 09:12:01,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 647 transitions, 5321 flow, removed 216 selfloop flow, removed 25 redundant places. [2022-07-21 09:12:01,931 INFO L242 Difference]: Finished difference. Result has 340 places, 324 transitions, 2986 flow [2022-07-21 09:12:01,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=2986, PETRI_PLACES=340, PETRI_TRANSITIONS=324} [2022-07-21 09:12:01,932 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 199 predicate places. [2022-07-21 09:12:01,932 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 324 transitions, 2986 flow [2022-07-21 09:12:01,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 69.30952380952381) internal successors, (5822), 84 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:01,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:01,934 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:01,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:12:02,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:02,150 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)] === [2022-07-21 09:12:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash -598237080, now seen corresponding path program 8 times [2022-07-21 09:12:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624472003] [2022-07-21 09:12:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:02,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624472003] [2022-07-21 09:12:04,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624472003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237205192] [2022-07-21 09:12:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:12:04,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:04,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:04,296 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) [2022-07-21 09:12:04,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:12:04,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:12:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 09:12:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:04,744 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:12:04,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:12:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:12:04,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:12:04,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237205192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:04,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:12:04,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [39] total 48 [2022-07-21 09:12:04,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248450038] [2022-07-21 09:12:04,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:04,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:12:04,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:12:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 09:12:04,820 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 154 [2022-07-21 09:12:04,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 324 transitions, 2986 flow. Second operand has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:04,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:04,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 154 [2022-07-21 09:12:04,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:06,303 INFO L129 PetriNetUnfolder]: 2844/6935 cut-off events. [2022-07-21 09:12:06,303 INFO L130 PetriNetUnfolder]: For 60538/61093 co-relation queries the response was YES. [2022-07-21 09:12:06,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31169 conditions, 6935 events. 2844/6935 cut-off events. For 60538/61093 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 61935 event pairs, 793 based on Foata normal form. 169/6733 useless extension candidates. Maximal degree in co-relation 31090. Up to 4074 conditions per place. [2022-07-21 09:12:06,405 INFO L132 encePairwiseOnDemand]: 137/154 looper letters, 204 selfloop transitions, 66 changer transitions 44/413 dead transitions. [2022-07-21 09:12:06,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 413 transitions, 4338 flow [2022-07-21 09:12:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:12:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:12:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1441 transitions. [2022-07-21 09:12:06,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2022-07-21 09:12:06,407 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1441 transitions. [2022-07-21 09:12:06,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1441 transitions. [2022-07-21 09:12:06,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:06,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1441 transitions. [2022-07-21 09:12:06,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.92857142857143) internal successors, (1441), 14 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:06,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:06,410 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 154.0) internal successors, (2310), 15 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:06,411 INFO L186 Difference]: Start difference. First operand has 340 places, 324 transitions, 2986 flow. Second operand 14 states and 1441 transitions. [2022-07-21 09:12:06,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 413 transitions, 4338 flow [2022-07-21 09:12:06,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 413 transitions, 3971 flow, removed 124 selfloop flow, removed 47 redundant places. [2022-07-21 09:12:06,607 INFO L242 Difference]: Finished difference. Result has 301 places, 345 transitions, 3171 flow [2022-07-21 09:12:06,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3171, PETRI_PLACES=301, PETRI_TRANSITIONS=345} [2022-07-21 09:12:06,608 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 160 predicate places. [2022-07-21 09:12:06,608 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 345 transitions, 3171 flow [2022-07-21 09:12:06,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:06,608 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:06,609 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:06,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:06,826 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,SelfDestructingSolverStorable9 [2022-07-21 09:12:06,826 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)] === [2022-07-21 09:12:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -419105616, now seen corresponding path program 9 times [2022-07-21 09:12:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:06,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345299415] [2022-07-21 09:12:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345299415] [2022-07-21 09:12:08,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345299415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29485451] [2022-07-21 09:12:08,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:12:08,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:08,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:08,433 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) [2022-07-21 09:12:08,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:12:08,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 09:12:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:12:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:12:09,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-07-21 09:12:09,411 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:12:09,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:12:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:12:09,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:12:09,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29485451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:09,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:12:09,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-21 09:12:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694469990] [2022-07-21 09:12:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:12:09,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:12:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 09:12:09,491 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:12:09,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 345 transitions, 3171 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:09,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:09,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:12:09,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:11,458 INFO L129 PetriNetUnfolder]: 2853/6944 cut-off events. [2022-07-21 09:12:11,458 INFO L130 PetriNetUnfolder]: For 57746/58258 co-relation queries the response was YES. [2022-07-21 09:12:11,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30435 conditions, 6944 events. 2853/6944 cut-off events. For 57746/58258 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 62040 event pairs, 794 based on Foata normal form. 183/6760 useless extension candidates. Maximal degree in co-relation 30362. Up to 4047 conditions per place. [2022-07-21 09:12:11,525 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 214 selfloop transitions, 70 changer transitions 49/420 dead transitions. [2022-07-21 09:12:11,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 420 transitions, 4368 flow [2022-07-21 09:12:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:12:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:12:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-07-21 09:12:11,527 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-07-21 09:12:11,527 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-07-21 09:12:11,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-07-21 09:12:11,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:11,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-07-21 09:12:11,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:11,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:11,532 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:11,532 INFO L186 Difference]: Start difference. First operand has 301 places, 345 transitions, 3171 flow. Second operand 21 states and 1877 transitions. [2022-07-21 09:12:11,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 420 transitions, 4368 flow [2022-07-21 09:12:11,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 420 transitions, 4242 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-07-21 09:12:11,684 INFO L242 Difference]: Finished difference. Result has 314 places, 346 transitions, 3236 flow [2022-07-21 09:12:11,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3236, PETRI_PLACES=314, PETRI_TRANSITIONS=346} [2022-07-21 09:12:11,684 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 173 predicate places. [2022-07-21 09:12:11,684 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 346 transitions, 3236 flow [2022-07-21 09:12:11,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:11,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:11,685 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:11,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 09:12:11,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:11,908 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)] === [2022-07-21 09:12:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1795464152, now seen corresponding path program 10 times [2022-07-21 09:12:11,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:11,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406464967] [2022-07-21 09:12:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:11,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406464967] [2022-07-21 09:12:13,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406464967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502502734] [2022-07-21 09:12:13,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:12:13,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:13,743 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) [2022-07-21 09:12:13,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:12:13,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:12:13,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:12:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:14,644 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:12:14,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:12:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:15,104 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:12:15,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-07-21 09:12:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502502734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:16,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:16,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 69 [2022-07-21 09:12:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235399795] [2022-07-21 09:12:16,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-21 09:12:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-21 09:12:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4336, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 09:12:16,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-21 09:12:16,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 346 transitions, 3236 flow. Second operand has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:16,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:16,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-21 09:12:16,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:27,443 INFO L129 PetriNetUnfolder]: 3627/8514 cut-off events. [2022-07-21 09:12:27,444 INFO L130 PetriNetUnfolder]: For 77462/77869 co-relation queries the response was YES. [2022-07-21 09:12:27,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38059 conditions, 8514 events. 3627/8514 cut-off events. For 77462/77869 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 76798 event pairs, 675 based on Foata normal form. 170/8349 useless extension candidates. Maximal degree in co-relation 37984. Up to 2376 conditions per place. [2022-07-21 09:12:27,530 INFO L132 encePairwiseOnDemand]: 112/154 looper letters, 303 selfloop transitions, 196 changer transitions 84/643 dead transitions. [2022-07-21 09:12:27,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 643 transitions, 6559 flow [2022-07-21 09:12:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 09:12:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-21 09:12:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4625 transitions. [2022-07-21 09:12:27,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.476705833848691 [2022-07-21 09:12:27,549 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4625 transitions. [2022-07-21 09:12:27,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4625 transitions. [2022-07-21 09:12:27,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:27,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4625 transitions. [2022-07-21 09:12:27,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 73.41269841269842) internal successors, (4625), 63 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:27,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:27,583 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:27,583 INFO L186 Difference]: Start difference. First operand has 314 places, 346 transitions, 3236 flow. Second operand 63 states and 4625 transitions. [2022-07-21 09:12:27,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 643 transitions, 6559 flow [2022-07-21 09:12:27,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 643 transitions, 6229 flow, removed 98 selfloop flow, removed 20 redundant places. [2022-07-21 09:12:27,847 INFO L242 Difference]: Finished difference. Result has 371 places, 393 transitions, 4369 flow [2022-07-21 09:12:27,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4369, PETRI_PLACES=371, PETRI_TRANSITIONS=393} [2022-07-21 09:12:27,848 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 230 predicate places. [2022-07-21 09:12:27,848 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 393 transitions, 4369 flow [2022-07-21 09:12:27,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:27,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:27,849 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:27,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:28,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:12:28,072 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)] === [2022-07-21 09:12:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1415463268, now seen corresponding path program 11 times [2022-07-21 09:12:28,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896095525] [2022-07-21 09:12:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896095525] [2022-07-21 09:12:29,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896095525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438067042] [2022-07-21 09:12:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:12:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:29,624 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:12:29,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:12:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:29,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 09:12:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:12:30,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-07-21 09:12:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:12:31,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:12:31,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-21 09:12:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:31,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:31,835 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:12:31,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 105 [2022-07-21 09:12:31,844 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:12:31,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2022-07-21 09:12:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:33,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438067042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:33,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 28] total 84 [2022-07-21 09:12:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144873866] [2022-07-21 09:12:33,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-21 09:12:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-21 09:12:33,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6576, Unknown=1, NotChecked=0, Total=6972 [2022-07-21 09:12:33,259 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-21 09:12:33,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 393 transitions, 4369 flow. Second operand has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:33,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:33,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-21 09:12:33,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:46,618 INFO L129 PetriNetUnfolder]: 3727/8973 cut-off events. [2022-07-21 09:12:46,619 INFO L130 PetriNetUnfolder]: For 111271/111777 co-relation queries the response was YES. [2022-07-21 09:12:46,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44343 conditions, 8973 events. 3727/8973 cut-off events. For 111271/111777 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 82994 event pairs, 855 based on Foata normal form. 189/8800 useless extension candidates. Maximal degree in co-relation 44253. Up to 2998 conditions per place. [2022-07-21 09:12:46,754 INFO L132 encePairwiseOnDemand]: 115/154 looper letters, 324 selfloop transitions, 163 changer transitions 115/659 dead transitions. [2022-07-21 09:12:46,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 659 transitions, 7543 flow [2022-07-21 09:12:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:12:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:12:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4751 transitions. [2022-07-21 09:12:46,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45368601986249046 [2022-07-21 09:12:46,758 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4751 transitions. [2022-07-21 09:12:46,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4751 transitions. [2022-07-21 09:12:46,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:46,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4751 transitions. [2022-07-21 09:12:46,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 69.86764705882354) internal successors, (4751), 68 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:46,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:46,771 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:46,771 INFO L186 Difference]: Start difference. First operand has 371 places, 393 transitions, 4369 flow. Second operand 68 states and 4751 transitions. [2022-07-21 09:12:46,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 659 transitions, 7543 flow [2022-07-21 09:12:47,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 659 transitions, 7002 flow, removed 190 selfloop flow, removed 48 redundant places. [2022-07-21 09:12:47,228 INFO L242 Difference]: Finished difference. Result has 396 places, 396 transitions, 4524 flow [2022-07-21 09:12:47,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4524, PETRI_PLACES=396, PETRI_TRANSITIONS=396} [2022-07-21 09:12:47,229 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 255 predicate places. [2022-07-21 09:12:47,229 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 396 transitions, 4524 flow [2022-07-21 09:12:47,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 66.44047619047619) internal successors, (5581), 84 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:47,230 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:47,231 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:47,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:12:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:12:47,452 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)] === [2022-07-21 09:12:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2123235670, now seen corresponding path program 12 times [2022-07-21 09:12:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623596017] [2022-07-21 09:12:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:47,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:49,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623596017] [2022-07-21 09:12:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623596017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303941937] [2022-07-21 09:12:49,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:12:49,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:49,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:49,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:49,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:12:49,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-07-21 09:12:49,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:12:49,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 09:12:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:50,023 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:12:50,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:12:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:12:50,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:12:50,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303941937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:12:50,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:12:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-07-21 09:12:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128191857] [2022-07-21 09:12:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:12:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:12:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:12:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 09:12:50,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-07-21 09:12:50,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 396 transitions, 4524 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:50,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:50,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-07-21 09:12:50,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:12:52,024 INFO L129 PetriNetUnfolder]: 3693/8865 cut-off events. [2022-07-21 09:12:52,024 INFO L130 PetriNetUnfolder]: For 119178/119755 co-relation queries the response was YES. [2022-07-21 09:12:52,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45741 conditions, 8865 events. 3693/8865 cut-off events. For 119178/119755 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 82338 event pairs, 1126 based on Foata normal form. 154/8544 useless extension candidates. Maximal degree in co-relation 45646. Up to 5540 conditions per place. [2022-07-21 09:12:52,167 INFO L132 encePairwiseOnDemand]: 139/154 looper letters, 268 selfloop transitions, 62 changer transitions 46/479 dead transitions. [2022-07-21 09:12:52,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 479 transitions, 6071 flow [2022-07-21 09:12:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:12:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:12:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1393 transitions. [2022-07-21 09:12:52,169 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-07-21 09:12:52,169 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1393 transitions. [2022-07-21 09:12:52,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1393 transitions. [2022-07-21 09:12:52,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:12:52,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1393 transitions. [2022-07-21 09:12:52,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.15384615384616) internal successors, (1393), 13 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,172 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,172 INFO L186 Difference]: Start difference. First operand has 396 places, 396 transitions, 4524 flow. Second operand 13 states and 1393 transitions. [2022-07-21 09:12:52,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 479 transitions, 6071 flow [2022-07-21 09:12:52,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 479 transitions, 5752 flow, removed 71 selfloop flow, removed 58 redundant places. [2022-07-21 09:12:52,688 INFO L242 Difference]: Finished difference. Result has 337 places, 410 transitions, 4716 flow [2022-07-21 09:12:52,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4716, PETRI_PLACES=337, PETRI_TRANSITIONS=410} [2022-07-21 09:12:52,689 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 196 predicate places. [2022-07-21 09:12:52,689 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 410 transitions, 4716 flow [2022-07-21 09:12:52,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:52,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:12:52,689 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:12:52,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 09:12:52,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:12:52,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:12:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:12:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1239829432, now seen corresponding path program 13 times [2022-07-21 09:12:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:12:52,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099284969] [2022-07-21 09:12:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:12:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:12:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:54,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:12:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099284969] [2022-07-21 09:12:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099284969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:12:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486035728] [2022-07-21 09:12:54,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:12:54,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:12:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:12:54,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:12:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:12:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:12:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 09:12:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:12:55,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:12:55,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-21 09:12:55,575 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-07-21 09:12:55,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 23 [2022-07-21 09:12:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:55,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:12:56,279 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-07-21 09:12:56,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 129 [2022-07-21 09:12:56,306 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-07-21 09:12:56,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 64 [2022-07-21 09:12:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:12:58,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486035728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:12:58,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:12:58,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 28] total 82 [2022-07-21 09:12:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949741829] [2022-07-21 09:12:58,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:12:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-21 09:12:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:12:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-21 09:12:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=6274, Unknown=1, NotChecked=0, Total=6642 [2022-07-21 09:12:58,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-07-21 09:12:58,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 410 transitions, 4716 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:12:58,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:12:58,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-07-21 09:12:58,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:08,186 INFO L129 PetriNetUnfolder]: 3834/9424 cut-off events. [2022-07-21 09:13:08,186 INFO L130 PetriNetUnfolder]: For 119423/119978 co-relation queries the response was YES. [2022-07-21 09:13:08,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46116 conditions, 9424 events. 3834/9424 cut-off events. For 119423/119978 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 89004 event pairs, 643 based on Foata normal form. 139/9151 useless extension candidates. Maximal degree in co-relation 46032. Up to 3205 conditions per place. [2022-07-21 09:13:08,322 INFO L132 encePairwiseOnDemand]: 113/154 looper letters, 325 selfloop transitions, 192 changer transitions 44/618 dead transitions. [2022-07-21 09:13:08,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 618 transitions, 8052 flow [2022-07-21 09:13:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 09:13:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-21 09:13:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3553 transitions. [2022-07-21 09:13:08,325 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-07-21 09:13:08,326 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3553 transitions. [2022-07-21 09:13:08,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3553 transitions. [2022-07-21 09:13:08,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:08,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3553 transitions. [2022-07-21 09:13:08,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 69.66666666666667) internal successors, (3553), 51 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,334 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 154.0) internal successors, (8008), 52 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,334 INFO L186 Difference]: Start difference. First operand has 337 places, 410 transitions, 4716 flow. Second operand 51 states and 3553 transitions. [2022-07-21 09:13:08,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 618 transitions, 8052 flow [2022-07-21 09:13:08,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 618 transitions, 7890 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-07-21 09:13:08,790 INFO L242 Difference]: Finished difference. Result has 389 places, 477 transitions, 6349 flow [2022-07-21 09:13:08,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6349, PETRI_PLACES=389, PETRI_TRANSITIONS=477} [2022-07-21 09:13:08,791 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2022-07-21 09:13:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 477 transitions, 6349 flow [2022-07-21 09:13:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:08,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:08,792 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:13:08,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:13:09,013 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)] === [2022-07-21 09:13:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1869641422, now seen corresponding path program 14 times [2022-07-21 09:13:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:09,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336530426] [2022-07-21 09:13:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336530426] [2022-07-21 09:13:10,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336530426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434433320] [2022-07-21 09:13:10,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:10,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:10,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:10,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:10,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:13:10,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:13:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 09:13:10,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:13:11,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-07-21 09:13:11,484 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:13:11,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:13:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:11,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:13:11,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434433320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:11,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:13:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-21 09:13:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593763908] [2022-07-21 09:13:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:13:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:13:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 09:13:11,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:13:11,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 477 transitions, 6349 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:11,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:11,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:13:11,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:14,075 INFO L129 PetriNetUnfolder]: 3803/9323 cut-off events. [2022-07-21 09:13:14,075 INFO L130 PetriNetUnfolder]: For 139489/140098 co-relation queries the response was YES. [2022-07-21 09:13:14,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 9323 events. 3803/9323 cut-off events. For 139489/140098 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 88704 event pairs, 1227 based on Foata normal form. 145/9012 useless extension candidates. Maximal degree in co-relation 49051. Up to 5800 conditions per place. [2022-07-21 09:13:14,239 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 336 selfloop transitions, 78 changer transitions 42/543 dead transitions. [2022-07-21 09:13:14,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 543 transitions, 7851 flow [2022-07-21 09:13:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:13:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:13:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-21 09:13:14,241 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-21 09:13:14,242 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-21 09:13:14,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-21 09:13:14,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:14,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-21 09:13:14,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,246 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,246 INFO L186 Difference]: Start difference. First operand has 389 places, 477 transitions, 6349 flow. Second operand 21 states and 1875 transitions. [2022-07-21 09:13:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 543 transitions, 7851 flow [2022-07-21 09:13:14,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 543 transitions, 7615 flow, removed 79 selfloop flow, removed 33 redundant places. [2022-07-21 09:13:14,825 INFO L242 Difference]: Finished difference. Result has 377 places, 478 transitions, 6364 flow [2022-07-21 09:13:14,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6364, PETRI_PLACES=377, PETRI_TRANSITIONS=478} [2022-07-21 09:13:14,826 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 236 predicate places. [2022-07-21 09:13:14,826 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 478 transitions, 6364 flow [2022-07-21 09:13:14,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:14,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:14,826 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:13:14,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:15,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:15,040 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)] === [2022-07-21 09:13:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash 543394134, now seen corresponding path program 15 times [2022-07-21 09:13:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:15,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109098601] [2022-07-21 09:13:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:16,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109098601] [2022-07-21 09:13:16,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109098601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535704137] [2022-07-21 09:13:16,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:13:16,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:16,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:16,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:16,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:13:16,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 09:13:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:13:16,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:17,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:13:17,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-07-21 09:13:17,442 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:13:17,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:13:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:17,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:13:17,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535704137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:17,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:13:17,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-07-21 09:13:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292355149] [2022-07-21 09:13:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:17,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:13:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:13:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2312, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 09:13:17,537 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:13:17,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 478 transitions, 6364 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:17,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:17,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:13:17,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:19,991 INFO L129 PetriNetUnfolder]: 3820/9413 cut-off events. [2022-07-21 09:13:19,992 INFO L130 PetriNetUnfolder]: For 137239/137875 co-relation queries the response was YES. [2022-07-21 09:13:20,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 9413 events. 3820/9413 cut-off events. For 137239/137875 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90116 event pairs, 1218 based on Foata normal form. 175/9109 useless extension candidates. Maximal degree in co-relation 49181. Up to 5798 conditions per place. [2022-07-21 09:13:20,145 INFO L132 encePairwiseOnDemand]: 132/154 looper letters, 336 selfloop transitions, 74 changer transitions 51/548 dead transitions. [2022-07-21 09:13:20,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 7869 flow [2022-07-21 09:13:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:13:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:13:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-07-21 09:13:20,147 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-07-21 09:13:20,147 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-07-21 09:13:20,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-07-21 09:13:20,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:20,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-07-21 09:13:20,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,179 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,179 INFO L186 Difference]: Start difference. First operand has 377 places, 478 transitions, 6364 flow. Second operand 21 states and 1875 transitions. [2022-07-21 09:13:20,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 7869 flow [2022-07-21 09:13:20,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 548 transitions, 7693 flow, removed 19 selfloop flow, removed 20 redundant places. [2022-07-21 09:13:20,790 INFO L242 Difference]: Finished difference. Result has 378 places, 474 transitions, 6282 flow [2022-07-21 09:13:20,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6282, PETRI_PLACES=378, PETRI_TRANSITIONS=474} [2022-07-21 09:13:20,791 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 237 predicate places. [2022-07-21 09:13:20,791 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 474 transitions, 6282 flow [2022-07-21 09:13:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:20,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:20,792 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2022-07-21 09:13:20,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 09:13:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:13:21,008 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -920380298, now seen corresponding path program 16 times [2022-07-21 09:13:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:21,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719766887] [2022-07-21 09:13:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719766887] [2022-07-21 09:13:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719766887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348975307] [2022-07-21 09:13:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:13:22,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:22,662 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:22,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:13:22,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:13:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:22,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 09:13:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:13:23,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-07-21 09:13:24,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:13:24,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:13:24,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-07-21 09:13:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:24,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:24,790 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-07-21 09:13:24,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 204 [2022-07-21 09:13:24,800 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:13:24,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 15 [2022-07-21 09:13:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:13:26,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348975307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:13:26,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:13:26,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 82 [2022-07-21 09:13:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970979011] [2022-07-21 09:13:26,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:13:26,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-21 09:13:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-21 09:13:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=6299, Unknown=1, NotChecked=0, Total=6642 [2022-07-21 09:13:26,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-07-21 09:13:26,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 474 transitions, 6282 flow. Second operand has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:26,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:26,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-07-21 09:13:26,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:42,451 INFO L129 PetriNetUnfolder]: 4080/10051 cut-off events. [2022-07-21 09:13:42,452 INFO L130 PetriNetUnfolder]: For 140761/141233 co-relation queries the response was YES. [2022-07-21 09:13:42,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51591 conditions, 10051 events. 4080/10051 cut-off events. For 140761/141233 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 97122 event pairs, 943 based on Foata normal form. 109/9739 useless extension candidates. Maximal degree in co-relation 51494. Up to 2668 conditions per place. [2022-07-21 09:13:42,646 INFO L132 encePairwiseOnDemand]: 116/154 looper letters, 429 selfloop transitions, 161 changer transitions 141/791 dead transitions. [2022-07-21 09:13:42,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 791 transitions, 10662 flow [2022-07-21 09:13:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:13:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:13:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5078 transitions. [2022-07-21 09:13:42,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4710575139146568 [2022-07-21 09:13:42,650 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5078 transitions. [2022-07-21 09:13:42,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5078 transitions. [2022-07-21 09:13:42,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:42,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5078 transitions. [2022-07-21 09:13:42,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 72.54285714285714) internal successors, (5078), 70 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:42,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:42,663 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 154.0) internal successors, (10934), 71 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:42,663 INFO L186 Difference]: Start difference. First operand has 378 places, 474 transitions, 6282 flow. Second operand 70 states and 5078 transitions. [2022-07-21 09:13:42,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 791 transitions, 10662 flow [2022-07-21 09:13:43,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 791 transitions, 10325 flow, removed 79 selfloop flow, removed 20 redundant places. [2022-07-21 09:13:43,281 INFO L242 Difference]: Finished difference. Result has 449 places, 517 transitions, 7410 flow [2022-07-21 09:13:43,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=7410, PETRI_PLACES=449, PETRI_TRANSITIONS=517} [2022-07-21 09:13:43,282 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 308 predicate places. [2022-07-21 09:13:43,282 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 517 transitions, 7410 flow [2022-07-21 09:13:43,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 69.46341463414635) internal successors, (5696), 82 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:43,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:43,284 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:13:43,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:13:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:13:43,497 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash 684691281, now seen corresponding path program 1 times [2022-07-21 09:13:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825211778] [2022-07-21 09:13:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:43,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:43,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:43,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825211778] [2022-07-21 09:13:43,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825211778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:43,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:43,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78345782] [2022-07-21 09:13:43,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:43,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:43,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:13:43,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 517 transitions, 7410 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:43,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:43,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:13:43,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:46,112 INFO L129 PetriNetUnfolder]: 4077/13269 cut-off events. [2022-07-21 09:13:46,113 INFO L130 PetriNetUnfolder]: For 131043/132024 co-relation queries the response was YES. [2022-07-21 09:13:46,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55309 conditions, 13269 events. 4077/13269 cut-off events. For 131043/132024 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 156798 event pairs, 1317 based on Foata normal form. 114/12065 useless extension candidates. Maximal degree in co-relation 55189. Up to 2965 conditions per place. [2022-07-21 09:13:46,397 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 389 selfloop transitions, 7 changer transitions 0/681 dead transitions. [2022-07-21 09:13:46,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 681 transitions, 11189 flow [2022-07-21 09:13:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:13:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:13:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-07-21 09:13:46,399 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-07-21 09:13:46,399 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-07-21 09:13:46,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-07-21 09:13:46,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:46,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-07-21 09:13:46,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,400 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:46,400 INFO L186 Difference]: Start difference. First operand has 449 places, 517 transitions, 7410 flow. Second operand 5 states and 690 transitions. [2022-07-21 09:13:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 681 transitions, 11189 flow [2022-07-21 09:13:47,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 681 transitions, 10869 flow, removed 95 selfloop flow, removed 59 redundant places. [2022-07-21 09:13:47,764 INFO L242 Difference]: Finished difference. Result has 369 places, 523 transitions, 7172 flow [2022-07-21 09:13:47,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7172, PETRI_PLACES=369, PETRI_TRANSITIONS=523} [2022-07-21 09:13:47,765 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 228 predicate places. [2022-07-21 09:13:47,765 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 523 transitions, 7172 flow [2022-07-21 09:13:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:47,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:47,766 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:13:47,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:13:47,767 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1996027203, now seen corresponding path program 1 times [2022-07-21 09:13:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736057383] [2022-07-21 09:13:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:47,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736057383] [2022-07-21 09:13:47,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736057383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:47,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:47,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:47,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675110195] [2022-07-21 09:13:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:47,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:47,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:47,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:13:47,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 523 transitions, 7172 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:47,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:47,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:13:47,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:50,080 INFO L129 PetriNetUnfolder]: 3525/11612 cut-off events. [2022-07-21 09:13:50,081 INFO L130 PetriNetUnfolder]: For 105935/106752 co-relation queries the response was YES. [2022-07-21 09:13:50,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47556 conditions, 11612 events. 3525/11612 cut-off events. For 105935/106752 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 133984 event pairs, 1232 based on Foata normal form. 328/11517 useless extension candidates. Maximal degree in co-relation 47461. Up to 3094 conditions per place. [2022-07-21 09:13:50,201 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 316 selfloop transitions, 7 changer transitions 41/624 dead transitions. [2022-07-21 09:13:50,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 624 transitions, 9872 flow [2022-07-21 09:13:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 812 transitions. [2022-07-21 09:13:50,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2022-07-21 09:13:50,202 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 812 transitions. [2022-07-21 09:13:50,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 812 transitions. [2022-07-21 09:13:50,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:50,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 812 transitions. [2022-07-21 09:13:50,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:50,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:50,204 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:50,204 INFO L186 Difference]: Start difference. First operand has 369 places, 523 transitions, 7172 flow. Second operand 6 states and 812 transitions. [2022-07-21 09:13:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 624 transitions, 9872 flow [2022-07-21 09:13:50,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 624 transitions, 9736 flow, removed 30 selfloop flow, removed 4 redundant places. [2022-07-21 09:13:50,839 INFO L242 Difference]: Finished difference. Result has 373 places, 489 transitions, 6480 flow [2022-07-21 09:13:50,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6480, PETRI_PLACES=373, PETRI_TRANSITIONS=489} [2022-07-21 09:13:50,840 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 232 predicate places. [2022-07-21 09:13:50,840 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 489 transitions, 6480 flow [2022-07-21 09:13:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:50,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:50,841 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:13:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:13:50,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1793788893, now seen corresponding path program 2 times [2022-07-21 09:13:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:50,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977162621] [2022-07-21 09:13:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:50,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:50,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977162621] [2022-07-21 09:13:50,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977162621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:50,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378540394] [2022-07-21 09:13:50,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:50,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:50,891 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:50,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:13:51,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:51,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:13:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:51,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:51,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378540394] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:51,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:13:51,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-21 09:13:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680702718] [2022-07-21 09:13:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:13:51,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:13:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:13:51,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-21 09:13:51,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 489 transitions, 6480 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:51,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:51,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-21 09:13:51,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:53,149 INFO L129 PetriNetUnfolder]: 2748/10331 cut-off events. [2022-07-21 09:13:53,150 INFO L130 PetriNetUnfolder]: For 98011/98999 co-relation queries the response was YES. [2022-07-21 09:13:53,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42466 conditions, 10331 events. 2748/10331 cut-off events. For 98011/98999 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 122476 event pairs, 714 based on Foata normal form. 389/10345 useless extension candidates. Maximal degree in co-relation 42371. Up to 2374 conditions per place. [2022-07-21 09:13:53,340 INFO L132 encePairwiseOnDemand]: 149/154 looper letters, 268 selfloop transitions, 9 changer transitions 11/553 dead transitions. [2022-07-21 09:13:53,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 553 transitions, 8313 flow [2022-07-21 09:13:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:13:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:13:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-07-21 09:13:53,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-07-21 09:13:53,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-07-21 09:13:53,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-07-21 09:13:53,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:53,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-07-21 09:13:53,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,343 INFO L186 Difference]: Start difference. First operand has 373 places, 489 transitions, 6480 flow. Second operand 4 states and 555 transitions. [2022-07-21 09:13:53,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 553 transitions, 8313 flow [2022-07-21 09:13:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 553 transitions, 8192 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-07-21 09:13:53,796 INFO L242 Difference]: Finished difference. Result has 364 places, 492 transitions, 6429 flow [2022-07-21 09:13:53,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6355, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6429, PETRI_PLACES=364, PETRI_TRANSITIONS=492} [2022-07-21 09:13:53,797 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 223 predicate places. [2022-07-21 09:13:53,797 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 492 transitions, 6429 flow [2022-07-21 09:13:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:53,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:53,798 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:13:53,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 09:13:54,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:54,015 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1329611087, now seen corresponding path program 3 times [2022-07-21 09:13:54,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:54,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723886538] [2022-07-21 09:13:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:54,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:54,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723886538] [2022-07-21 09:13:54,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723886538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:13:54,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:13:54,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:13:54,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818057386] [2022-07-21 09:13:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:54,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:13:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:13:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:13:54,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:13:54,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 492 transitions, 6429 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:54,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:54,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:13:54,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:56,698 INFO L129 PetriNetUnfolder]: 3824/13137 cut-off events. [2022-07-21 09:13:56,699 INFO L130 PetriNetUnfolder]: For 112513/113615 co-relation queries the response was YES. [2022-07-21 09:13:56,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54839 conditions, 13137 events. 3824/13137 cut-off events. For 112513/113615 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 157525 event pairs, 1156 based on Foata normal form. 191/12857 useless extension candidates. Maximal degree in co-relation 54746. Up to 3152 conditions per place. [2022-07-21 09:13:56,829 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 340 selfloop transitions, 13 changer transitions 16/629 dead transitions. [2022-07-21 09:13:56,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 629 transitions, 9619 flow [2022-07-21 09:13:56,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:13:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:13:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 823 transitions. [2022-07-21 09:13:56,831 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8906926406926406 [2022-07-21 09:13:56,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 823 transitions. [2022-07-21 09:13:56,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 823 transitions. [2022-07-21 09:13:56,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:13:56,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 823 transitions. [2022-07-21 09:13:56,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.16666666666666) internal successors, (823), 6 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,833 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:56,833 INFO L186 Difference]: Start difference. First operand has 364 places, 492 transitions, 6429 flow. Second operand 6 states and 823 transitions. [2022-07-21 09:13:56,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 629 transitions, 9619 flow [2022-07-21 09:13:57,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 629 transitions, 9607 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 09:13:57,417 INFO L242 Difference]: Finished difference. Result has 372 places, 499 transitions, 6530 flow [2022-07-21 09:13:57,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6530, PETRI_PLACES=372, PETRI_TRANSITIONS=499} [2022-07-21 09:13:57,418 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 231 predicate places. [2022-07-21 09:13:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 499 transitions, 6530 flow [2022-07-21 09:13:57,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:57,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:13:57,418 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:13:57,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:13:57,418 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:13:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:13:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash 585481907, now seen corresponding path program 2 times [2022-07-21 09:13:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:13:57,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399801690] [2022-07-21 09:13:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:13:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:13:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:13:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:57,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:13:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399801690] [2022-07-21 09:13:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399801690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777894797] [2022-07-21 09:13:57,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:13:57,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:13:57,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:13:57,544 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:13:57,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:13:57,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:13:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:13:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:13:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:13:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:57,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:13:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:13:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777894797] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:13:57,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:13:57,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-21 09:13:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054628514] [2022-07-21 09:13:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:13:57,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:13:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:13:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:13:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:13:57,729 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-07-21 09:13:57,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 499 transitions, 6530 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:13:57,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:13:57,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-07-21 09:13:57,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:13:59,903 INFO L129 PetriNetUnfolder]: 3072/10937 cut-off events. [2022-07-21 09:13:59,903 INFO L130 PetriNetUnfolder]: For 100969/102068 co-relation queries the response was YES. [2022-07-21 09:14:00,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47202 conditions, 10937 events. 3072/10937 cut-off events. For 100969/102068 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 128291 event pairs, 837 based on Foata normal form. 383/10922 useless extension candidates. Maximal degree in co-relation 47105. Up to 2040 conditions per place. [2022-07-21 09:14:00,176 INFO L132 encePairwiseOnDemand]: 149/154 looper letters, 218 selfloop transitions, 10 changer transitions 18/495 dead transitions. [2022-07-21 09:14:00,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 495 transitions, 6890 flow [2022-07-21 09:14:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:14:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:14:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-07-21 09:14:00,178 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-07-21 09:14:00,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-07-21 09:14:00,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-07-21 09:14:00,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:00,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-07-21 09:14:00,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,194 INFO L186 Difference]: Start difference. First operand has 372 places, 499 transitions, 6530 flow. Second operand 4 states and 555 transitions. [2022-07-21 09:14:00,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 495 transitions, 6890 flow [2022-07-21 09:14:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 495 transitions, 6716 flow, removed 23 selfloop flow, removed 10 redundant places. [2022-07-21 09:14:00,680 INFO L242 Difference]: Finished difference. Result has 363 places, 426 transitions, 4942 flow [2022-07-21 09:14:00,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4942, PETRI_PLACES=363, PETRI_TRANSITIONS=426} [2022-07-21 09:14:00,681 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 222 predicate places. [2022-07-21 09:14:00,681 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 426 transitions, 4942 flow [2022-07-21 09:14:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:00,682 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:14:00,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:00,889 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -663964879, now seen corresponding path program 4 times [2022-07-21 09:14:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:00,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606480781] [2022-07-21 09:14:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:00,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:00,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606480781] [2022-07-21 09:14:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606480781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:00,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:14:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131552692] [2022-07-21 09:14:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:14:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:00,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:14:00,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:14:00,943 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:14:00,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 426 transitions, 4942 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:00,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:00,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:14:00,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:03,492 INFO L129 PetriNetUnfolder]: 3925/12666 cut-off events. [2022-07-21 09:14:03,492 INFO L130 PetriNetUnfolder]: For 107289/108095 co-relation queries the response was YES. [2022-07-21 09:14:03,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55313 conditions, 12666 events. 3925/12666 cut-off events. For 107289/108095 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 144991 event pairs, 1156 based on Foata normal form. 98/12262 useless extension candidates. Maximal degree in co-relation 55219. Up to 2889 conditions per place. [2022-07-21 09:14:03,650 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 269 selfloop transitions, 15 changer transitions 0/524 dead transitions. [2022-07-21 09:14:03,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 524 transitions, 7135 flow [2022-07-21 09:14:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:14:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:14:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2022-07-21 09:14:03,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8948051948051948 [2022-07-21 09:14:03,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2022-07-21 09:14:03,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2022-07-21 09:14:03,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:03,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2022-07-21 09:14:03,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:03,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:03,656 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:03,657 INFO L186 Difference]: Start difference. First operand has 363 places, 426 transitions, 4942 flow. Second operand 5 states and 689 transitions. [2022-07-21 09:14:03,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 524 transitions, 7135 flow [2022-07-21 09:14:04,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 524 transitions, 6982 flow, removed 25 selfloop flow, removed 7 redundant places. [2022-07-21 09:14:04,203 INFO L242 Difference]: Finished difference. Result has 360 places, 434 transitions, 4992 flow [2022-07-21 09:14:04,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4992, PETRI_PLACES=360, PETRI_TRANSITIONS=434} [2022-07-21 09:14:04,204 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 219 predicate places. [2022-07-21 09:14:04,204 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 434 transitions, 4992 flow [2022-07-21 09:14:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:04,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:04,204 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:14:04,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:14:04,205 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -289117503, now seen corresponding path program 5 times [2022-07-21 09:14:04,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:04,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618842604] [2022-07-21 09:14:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:04,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618842604] [2022-07-21 09:14:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618842604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329442643] [2022-07-21 09:14:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:14:04,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:04,259 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:04,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:14:04,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:14:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:14:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:04,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:04,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329442643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:04,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:04,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-21 09:14:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217836881] [2022-07-21 09:14:04,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:04,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:14:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:14:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:14:04,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:14:04,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 434 transitions, 4992 flow. Second operand has 8 states, 8 states have (on average 129.375) internal successors, (1035), 8 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) [2022-07-21 09:14:04,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:04,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:14:04,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:07,571 INFO L129 PetriNetUnfolder]: 4736/15250 cut-off events. [2022-07-21 09:14:07,572 INFO L130 PetriNetUnfolder]: For 134787/135714 co-relation queries the response was YES. [2022-07-21 09:14:07,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65513 conditions, 15250 events. 4736/15250 cut-off events. For 134787/135714 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 181011 event pairs, 873 based on Foata normal form. 252/14992 useless extension candidates. Maximal degree in co-relation 65419. Up to 2418 conditions per place. [2022-07-21 09:14:07,756 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 320 selfloop transitions, 41 changer transitions 7/608 dead transitions. [2022-07-21 09:14:07,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 608 transitions, 8445 flow [2022-07-21 09:14:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:14:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:14:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1369 transitions. [2022-07-21 09:14:07,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.888961038961039 [2022-07-21 09:14:07,757 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1369 transitions. [2022-07-21 09:14:07,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1369 transitions. [2022-07-21 09:14:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1369 transitions. [2022-07-21 09:14:07,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:07,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 154.0) internal successors, (1694), 11 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:07,760 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 154.0) internal successors, (1694), 11 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:07,760 INFO L186 Difference]: Start difference. First operand has 360 places, 434 transitions, 4992 flow. Second operand 10 states and 1369 transitions. [2022-07-21 09:14:07,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 608 transitions, 8445 flow [2022-07-21 09:14:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 608 transitions, 8439 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 09:14:08,334 INFO L242 Difference]: Finished difference. Result has 377 places, 453 transitions, 5347 flow [2022-07-21 09:14:08,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5347, PETRI_PLACES=377, PETRI_TRANSITIONS=453} [2022-07-21 09:14:08,335 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 236 predicate places. [2022-07-21 09:14:08,335 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 453 transitions, 5347 flow [2022-07-21 09:14:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.375) internal successors, (1035), 8 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) [2022-07-21 09:14:08,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:08,335 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:14:08,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-21 09:14:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:08,542 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1860114485, now seen corresponding path program 6 times [2022-07-21 09:14:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:08,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814956093] [2022-07-21 09:14:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:08,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:08,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814956093] [2022-07-21 09:14:08,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814956093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:08,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:08,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:14:08,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979148852] [2022-07-21 09:14:08,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:08,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:14:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:14:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:14:08,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:14:08,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 453 transitions, 5347 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:08,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:08,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:14:08,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:11,651 INFO L129 PetriNetUnfolder]: 4598/15312 cut-off events. [2022-07-21 09:14:11,651 INFO L130 PetriNetUnfolder]: For 154796/155783 co-relation queries the response was YES. [2022-07-21 09:14:11,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69699 conditions, 15312 events. 4598/15312 cut-off events. For 154796/155783 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 183264 event pairs, 1313 based on Foata normal form. 202/14934 useless extension candidates. Maximal degree in co-relation 69597. Up to 3300 conditions per place. [2022-07-21 09:14:12,060 INFO L132 encePairwiseOnDemand]: 147/154 looper letters, 268 selfloop transitions, 17 changer transitions 9/528 dead transitions. [2022-07-21 09:14:12,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 528 transitions, 7092 flow [2022-07-21 09:14:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:14:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:14:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2022-07-21 09:14:12,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8777056277056277 [2022-07-21 09:14:12,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2022-07-21 09:14:12,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2022-07-21 09:14:12,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:12,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2022-07-21 09:14:12,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,063 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,063 INFO L186 Difference]: Start difference. First operand has 377 places, 453 transitions, 5347 flow. Second operand 6 states and 811 transitions. [2022-07-21 09:14:12,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 528 transitions, 7092 flow [2022-07-21 09:14:12,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 528 transitions, 7025 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-21 09:14:12,787 INFO L242 Difference]: Finished difference. Result has 384 places, 447 transitions, 5243 flow [2022-07-21 09:14:12,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5243, PETRI_PLACES=384, PETRI_TRANSITIONS=447} [2022-07-21 09:14:12,788 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 243 predicate places. [2022-07-21 09:14:12,788 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 447 transitions, 5243 flow [2022-07-21 09:14:12,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:12,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:12,789 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-21 09:14:12,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:14:12,789 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1067002803, now seen corresponding path program 7 times [2022-07-21 09:14:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:12,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682714987] [2022-07-21 09:14:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:12,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682714987] [2022-07-21 09:14:12,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682714987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148355136] [2022-07-21 09:14:12,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:14:12,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:12,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:12,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:12,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:14:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:14:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:12,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:14:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148355136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:14:12,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:14:12,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-21 09:14:12,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024952022] [2022-07-21 09:14:12,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:14:12,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:14:12,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:14:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:14:13,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-07-21 09:14:13,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 447 transitions, 5243 flow. Second operand has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:13,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:13,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-07-21 09:14:13,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:15,843 INFO L129 PetriNetUnfolder]: 4269/13817 cut-off events. [2022-07-21 09:14:15,844 INFO L130 PetriNetUnfolder]: For 145971/146735 co-relation queries the response was YES. [2022-07-21 09:14:16,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63970 conditions, 13817 events. 4269/13817 cut-off events. For 145971/146735 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 160259 event pairs, 999 based on Foata normal form. 200/13530 useless extension candidates. Maximal degree in co-relation 63865. Up to 2419 conditions per place. [2022-07-21 09:14:16,058 INFO L132 encePairwiseOnDemand]: 146/154 looper letters, 225 selfloop transitions, 33 changer transitions 18/497 dead transitions. [2022-07-21 09:14:16,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 497 transitions, 6438 flow [2022-07-21 09:14:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:14:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:14:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1090 transitions. [2022-07-21 09:14:16,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8847402597402597 [2022-07-21 09:14:16,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1090 transitions. [2022-07-21 09:14:16,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1090 transitions. [2022-07-21 09:14:16,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:16,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1090 transitions. [2022-07-21 09:14:16,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.25) internal successors, (1090), 8 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,065 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,065 INFO L186 Difference]: Start difference. First operand has 384 places, 447 transitions, 5243 flow. Second operand 8 states and 1090 transitions. [2022-07-21 09:14:16,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 497 transitions, 6438 flow [2022-07-21 09:14:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 497 transitions, 6284 flow, removed 21 selfloop flow, removed 11 redundant places. [2022-07-21 09:14:16,783 INFO L242 Difference]: Finished difference. Result has 383 places, 394 transitions, 4264 flow [2022-07-21 09:14:16,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=383, PETRI_TRANSITIONS=394} [2022-07-21 09:14:16,784 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 242 predicate places. [2022-07-21 09:14:16,784 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 394 transitions, 4264 flow [2022-07-21 09:14:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:16,785 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:16,785 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2022-07-21 09:14:16,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:17,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:14:17,005 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1510232346, now seen corresponding path program 17 times [2022-07-21 09:14:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221498773] [2022-07-21 09:14:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221498773] [2022-07-21 09:14:18,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221498773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:18,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082026418] [2022-07-21 09:14:18,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:14:18,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:18,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:18,616 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:14:18,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:14:18,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:14:18,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:14:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:14:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:14:19,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-07-21 09:14:19,456 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:14:19,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 17 [2022-07-21 09:14:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:14:19,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:14:19,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082026418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:19,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:14:19,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [33] total 48 [2022-07-21 09:14:19,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181576886] [2022-07-21 09:14:19,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:19,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:14:19,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:14:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 09:14:19,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-07-21 09:14:19,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 394 transitions, 4264 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:19,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:19,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-07-21 09:14:19,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:24,039 INFO L129 PetriNetUnfolder]: 6617/17151 cut-off events. [2022-07-21 09:14:24,040 INFO L130 PetriNetUnfolder]: For 176681/177368 co-relation queries the response was YES. [2022-07-21 09:14:24,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77934 conditions, 17151 events. 6617/17151 cut-off events. For 176681/177368 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 194744 event pairs, 2819 based on Foata normal form. 155/16722 useless extension candidates. Maximal degree in co-relation 77829. Up to 9703 conditions per place. [2022-07-21 09:14:24,339 INFO L132 encePairwiseOnDemand]: 131/154 looper letters, 209 selfloop transitions, 59 changer transitions 41/452 dead transitions. [2022-07-21 09:14:24,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 452 transitions, 5269 flow [2022-07-21 09:14:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:14:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 09:14:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1872 transitions. [2022-07-21 09:14:24,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5788497217068646 [2022-07-21 09:14:24,341 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1872 transitions. [2022-07-21 09:14:24,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1872 transitions. [2022-07-21 09:14:24,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:24,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1872 transitions. [2022-07-21 09:14:24,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.14285714285714) internal successors, (1872), 21 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:24,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:24,345 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:24,346 INFO L186 Difference]: Start difference. First operand has 383 places, 394 transitions, 4264 flow. Second operand 21 states and 1872 transitions. [2022-07-21 09:14:24,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 452 transitions, 5269 flow [2022-07-21 09:14:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 452 transitions, 5211 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-07-21 09:14:25,033 INFO L242 Difference]: Finished difference. Result has 402 places, 392 transitions, 4311 flow [2022-07-21 09:14:25,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4311, PETRI_PLACES=402, PETRI_TRANSITIONS=392} [2022-07-21 09:14:25,038 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 261 predicate places. [2022-07-21 09:14:25,038 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 392 transitions, 4311 flow [2022-07-21 09:14:25,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:14:25,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:25,039 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2022-07-21 09:14:25,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:14:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 09:14:25,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:14:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash 294385958, now seen corresponding path program 18 times [2022-07-21 09:14:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:25,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834152735] [2022-07-21 09:14:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:25,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat