./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-dot-product.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-bad-dot-product.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:04:03,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:04:03,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:04:03,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:04:03,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:04:03,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:04:03,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:04:03,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:04:03,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:04:03,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:04:03,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:04:03,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:04:03,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:04:03,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:04:03,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:04:03,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:04:03,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:04:03,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:04:03,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:04:03,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:04:03,766 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:04:03,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:04:03,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:04:03,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:04:03,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:04:03,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:04:03,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:04:03,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:04:03,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:04:03,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:04:03,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:04:03,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:04:03,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:04:03,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:04:03,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:04:03,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:04:03,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:04:03,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:04:03,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:04:03,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:04:03,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:04:03,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:04:03,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:04:03,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:04:03,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:04:03,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:04:03,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:04:03,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:04:03,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:04:03,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:04:03,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:04:03,820 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:04:03,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:04:03,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:04:03,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:04:03,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:04:03,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:04:03,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:04:03,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:04:03,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:04:03,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:04:03,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:04:03,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:03,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:04:03,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:04:03,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:04:03,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 [2022-07-21 09:04:04,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:04:04,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:04:04,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:04:04,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:04:04,096 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:04:04,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-07-21 09:04:04,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da83f182f/422bb9012c6c4791917535f428eab9be/FLAG73d342b16 [2022-07-21 09:04:04,506 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:04:04,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-07-21 09:04:04,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da83f182f/422bb9012c6c4791917535f428eab9be/FLAG73d342b16 [2022-07-21 09:04:04,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da83f182f/422bb9012c6c4791917535f428eab9be [2022-07-21 09:04:04,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:04:04,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:04:04,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:04,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:04:04,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:04:04,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a18ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04, skipping insertion in model container [2022-07-21 09:04:04,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:04:04,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:04:04,703 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-bad-dot-product.wvr.c[2865,2878] [2022-07-21 09:04:04,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:04,766 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:04:04,798 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-bad-dot-product.wvr.c[2865,2878] [2022-07-21 09:04:04,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:04:04,816 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:04:04,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04 WrapperNode [2022-07-21 09:04:04,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:04:04,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:04,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:04:04,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:04:04,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,871 INFO L137 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 275 [2022-07-21 09:04:04,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:04:04,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:04:04,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:04:04,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:04:04,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:04:04,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:04:04,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:04:04,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:04:04,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (1/1) ... [2022-07-21 09:04:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:04:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:04,953 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 09:04:04,966 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 09:04:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:04:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:04:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:04:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-21 09:04:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:04:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:04:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:04:04,984 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 09:04:05,091 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:04:05,092 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:04:05,344 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:04:05,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:04:05,422 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-21 09:04:05,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:05 BoogieIcfgContainer [2022-07-21 09:04:05,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:04:05,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:04:05,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:04:05,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:04:05,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:04:04" (1/3) ... [2022-07-21 09:04:05,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3133f9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:05, skipping insertion in model container [2022-07-21 09:04:05,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:04:04" (2/3) ... [2022-07-21 09:04:05,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3133f9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:04:05, skipping insertion in model container [2022-07-21 09:04:05,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:04:05" (3/3) ... [2022-07-21 09:04:05,429 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2022-07-21 09:04:05,433 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:04:05,439 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:04:05,439 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:04:05,439 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:04:05,508 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 09:04:05,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 538 flow [2022-07-21 09:04:05,624 INFO L129 PetriNetUnfolder]: 25/254 cut-off events. [2022-07-21 09:04:05,627 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:05,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 25/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-07-21 09:04:05,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 538 flow [2022-07-21 09:04:05,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 504 flow [2022-07-21 09:04:05,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:04:05,657 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@32d6eefc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1bf78750 [2022-07-21 09:04:05,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:04:05,695 INFO L129 PetriNetUnfolder]: 25/242 cut-off events. [2022-07-21 09:04:05,696 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 09:04:05,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:05,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:05,697 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 09:04:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash -689798278, now seen corresponding path program 1 times [2022-07-21 09:04:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026729741] [2022-07-21 09:04:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:05,901 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 09:04:05,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026729741] [2022-07-21 09:04:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026729741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:05,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:04:05,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862085093] [2022-07-21 09:04:05,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:04:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:04:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:04:05,939 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 257 [2022-07-21 09:04:05,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 504 flow. Second operand has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 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 09:04:05,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:05,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 257 [2022-07-21 09:04:05,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:06,021 INFO L129 PetriNetUnfolder]: 31/379 cut-off events. [2022-07-21 09:04:06,021 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 09:04:06,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 379 events. 31/379 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1238 event pairs, 15 based on Foata normal form. 64/407 useless extension candidates. Maximal degree in co-relation 267. Up to 37 conditions per place. [2022-07-21 09:04:06,025 INFO L132 encePairwiseOnDemand]: 240/257 looper letters, 9 selfloop transitions, 0 changer transitions 6/226 dead transitions. [2022-07-21 09:04:06,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 226 transitions, 488 flow [2022-07-21 09:04:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:04:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:04:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 486 transitions. [2022-07-21 09:04:06,036 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9455252918287937 [2022-07-21 09:04:06,037 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 486 transitions. [2022-07-21 09:04:06,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 486 transitions. [2022-07-21 09:04:06,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:06,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 486 transitions. [2022-07-21 09:04:06,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:06,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 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 09:04:06,048 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 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 09:04:06,049 INFO L186 Difference]: Start difference. First operand has 228 places, 243 transitions, 504 flow. Second operand 2 states and 486 transitions. [2022-07-21 09:04:06,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 226 transitions, 488 flow [2022-07-21 09:04:06,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:04:06,056 INFO L242 Difference]: Finished difference. Result has 223 places, 220 transitions, 446 flow [2022-07-21 09:04:06,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=223, PETRI_TRANSITIONS=220} [2022-07-21 09:04:06,060 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-07-21 09:04:06,060 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 220 transitions, 446 flow [2022-07-21 09:04:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 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 09:04:06,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:06,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:04:06,062 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 09:04:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 65737028, now seen corresponding path program 1 times [2022-07-21 09:04:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941039123] [2022-07-21 09:04:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:06,328 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 09:04:06,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:06,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941039123] [2022-07-21 09:04:06,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941039123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:06,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:06,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:04:06,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632739467] [2022-07-21 09:04:06,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:06,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:04:06,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:06,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:04:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:04:06,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 257 [2022-07-21 09:04:06,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 220 transitions, 446 flow. Second operand has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:06,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:06,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 257 [2022-07-21 09:04:06,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:06,636 INFO L129 PetriNetUnfolder]: 324/1335 cut-off events. [2022-07-21 09:04:06,636 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 09:04:06,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1335 events. 324/1335 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8391 event pairs, 167 based on Foata normal form. 1/1076 useless extension candidates. Maximal degree in co-relation 1821. Up to 418 conditions per place. [2022-07-21 09:04:06,644 INFO L132 encePairwiseOnDemand]: 245/257 looper letters, 60 selfloop transitions, 8 changer transitions 22/246 dead transitions. [2022-07-21 09:04:06,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 246 transitions, 678 flow [2022-07-21 09:04:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1950 transitions. [2022-07-21 09:04:06,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6897771489211177 [2022-07-21 09:04:06,650 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1950 transitions. [2022-07-21 09:04:06,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1950 transitions. [2022-07-21 09:04:06,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:06,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1950 transitions. [2022-07-21 09:04:06,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.27272727272728) internal successors, (1950), 11 states have internal predecessors, (1950), 0 states have call successors, (0), 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 09:04:06,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:06,669 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:06,669 INFO L186 Difference]: Start difference. First operand has 223 places, 220 transitions, 446 flow. Second operand 11 states and 1950 transitions. [2022-07-21 09:04:06,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 246 transitions, 678 flow [2022-07-21 09:04:06,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 246 transitions, 678 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:04:06,679 INFO L242 Difference]: Finished difference. Result has 231 places, 221 transitions, 478 flow [2022-07-21 09:04:06,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=478, PETRI_PLACES=231, PETRI_TRANSITIONS=221} [2022-07-21 09:04:06,680 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 3 predicate places. [2022-07-21 09:04:06,681 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 221 transitions, 478 flow [2022-07-21 09:04:06,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:06,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:06,682 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, 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 09:04:06,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:04:06,682 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 09:04:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1792910433, now seen corresponding path program 1 times [2022-07-21 09:04:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:06,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385047871] [2022-07-21 09:04:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:06,865 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 09:04:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:06,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385047871] [2022-07-21 09:04:06,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385047871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:06,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915979833] [2022-07-21 09:04:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:06,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:06,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:06,875 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 09:04:06,891 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 09:04:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:04:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:07,193 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 09:04:07,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:07,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915979833] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:07,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:07,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:04:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954310047] [2022-07-21 09:04:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:04:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:04:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:07,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 257 [2022-07-21 09:04:07,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 221 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 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 09:04:07,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:07,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 257 [2022-07-21 09:04:07,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:07,520 INFO L129 PetriNetUnfolder]: 166/758 cut-off events. [2022-07-21 09:04:07,520 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-21 09:04:07,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 758 events. 166/758 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4157 event pairs, 45 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 1086. Up to 161 conditions per place. [2022-07-21 09:04:07,524 INFO L132 encePairwiseOnDemand]: 249/257 looper letters, 47 selfloop transitions, 7 changer transitions 0/229 dead transitions. [2022-07-21 09:04:07,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 229 transitions, 604 flow [2022-07-21 09:04:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:04:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:04:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1412 transitions. [2022-07-21 09:04:07,527 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7848804891606448 [2022-07-21 09:04:07,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1412 transitions. [2022-07-21 09:04:07,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1412 transitions. [2022-07-21 09:04:07,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:07,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1412 transitions. [2022-07-21 09:04:07,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.71428571428572) internal successors, (1412), 7 states have internal predecessors, (1412), 0 states have call successors, (0), 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 09:04:07,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 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 09:04:07,534 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 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 09:04:07,534 INFO L186 Difference]: Start difference. First operand has 231 places, 221 transitions, 478 flow. Second operand 7 states and 1412 transitions. [2022-07-21 09:04:07,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 229 transitions, 604 flow [2022-07-21 09:04:07,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 229 transitions, 582 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-07-21 09:04:07,538 INFO L242 Difference]: Finished difference. Result has 228 places, 223 transitions, 489 flow [2022-07-21 09:04:07,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=228, PETRI_TRANSITIONS=223} [2022-07-21 09:04:07,540 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-21 09:04:07,541 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 223 transitions, 489 flow [2022-07-21 09:04:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 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 09:04:07,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:07,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:07,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:04:07,755 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 09:04:07,756 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 09:04:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1770742449, now seen corresponding path program 1 times [2022-07-21 09:04:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587847832] [2022-07-21 09:04:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587847832] [2022-07-21 09:04:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587847832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:07,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127188191] [2022-07-21 09:04:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:07,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:07,900 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 09:04:07,908 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 09:04:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:07,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:04:07,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:08,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127188191] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-21 09:04:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567249828] [2022-07-21 09:04:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:04:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:04:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:04:08,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 257 [2022-07-21 09:04:08,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 223 transitions, 489 flow. Second operand has 9 states, 9 states have (on average 189.11111111111111) internal successors, (1702), 9 states have internal predecessors, (1702), 0 states have call successors, (0), 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 09:04:08,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:08,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 257 [2022-07-21 09:04:08,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:08,778 INFO L129 PetriNetUnfolder]: 1013/2871 cut-off events. [2022-07-21 09:04:08,778 INFO L130 PetriNetUnfolder]: For 620/880 co-relation queries the response was YES. [2022-07-21 09:04:08,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2871 events. 1013/2871 cut-off events. For 620/880 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22285 event pairs, 119 based on Foata normal form. 260/2733 useless extension candidates. Maximal degree in co-relation 4812. Up to 475 conditions per place. [2022-07-21 09:04:08,795 INFO L132 encePairwiseOnDemand]: 245/257 looper letters, 96 selfloop transitions, 19 changer transitions 0/281 dead transitions. [2022-07-21 09:04:08,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 281 transitions, 884 flow [2022-07-21 09:04:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2144 transitions. [2022-07-21 09:04:08,800 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.758401131941988 [2022-07-21 09:04:08,800 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2144 transitions. [2022-07-21 09:04:08,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2144 transitions. [2022-07-21 09:04:08,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:08,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2144 transitions. [2022-07-21 09:04:08,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.9090909090909) internal successors, (2144), 11 states have internal predecessors, (2144), 0 states have call successors, (0), 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 09:04:08,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:08,808 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:08,808 INFO L186 Difference]: Start difference. First operand has 228 places, 223 transitions, 489 flow. Second operand 11 states and 2144 transitions. [2022-07-21 09:04:08,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 281 transitions, 884 flow [2022-07-21 09:04:08,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 281 transitions, 871 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:04:08,813 INFO L242 Difference]: Finished difference. Result has 240 places, 235 transitions, 588 flow [2022-07-21 09:04:08,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=588, PETRI_PLACES=240, PETRI_TRANSITIONS=235} [2022-07-21 09:04:08,814 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 12 predicate places. [2022-07-21 09:04:08,814 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 235 transitions, 588 flow [2022-07-21 09:04:08,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.11111111111111) internal successors, (1702), 9 states have internal predecessors, (1702), 0 states have call successors, (0), 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 09:04:08,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:08,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:08,850 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 09:04:09,033 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 09:04:09,034 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 09:04:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash -655470049, now seen corresponding path program 2 times [2022-07-21 09:04:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:09,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803310235] [2022-07-21 09:04:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:04:09,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:09,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803310235] [2022-07-21 09:04:09,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803310235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:09,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37759209] [2022-07-21 09:04:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:04:09,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:09,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:09,163 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 09:04:09,164 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 09:04:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:04:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:04:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:09,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:04:09,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37759209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:09,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:04:09,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-21 09:04:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570497041] [2022-07-21 09:04:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:09,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:09,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:09,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 257 [2022-07-21 09:04:09,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 235 transitions, 588 flow. Second operand has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 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 09:04:09,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:09,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 257 [2022-07-21 09:04:09,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:09,704 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 2191#(= ~res1~0 0), 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 5#L101-4true, 171#L75-4true, 180#thread1ENTRYtrue, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,705 INFO L384 tUnfolder$Statistics]: this new event has 169 ancestors and is cut-off event [2022-07-21 09:04:09,705 INFO L387 tUnfolder$Statistics]: existing Event has 160 ancestors and is cut-off event [2022-07-21 09:04:09,705 INFO L387 tUnfolder$Statistics]: existing Event has 153 ancestors and is cut-off event [2022-07-21 09:04:09,705 INFO L387 tUnfolder$Statistics]: existing Event has 153 ancestors and is cut-off event [2022-07-21 09:04:09,728 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 279#(<= 1 ~N~0), Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 113#L54true, Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 5#L101-4true, 2148#true, 171#L75-4true, 245#true, Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,728 INFO L384 tUnfolder$Statistics]: this new event has 184 ancestors and is cut-off event [2022-07-21 09:04:09,728 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-21 09:04:09,728 INFO L387 tUnfolder$Statistics]: existing Event has 175 ancestors and is cut-off event [2022-07-21 09:04:09,728 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-21 09:04:09,730 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([915] thread2EXIT-->L103-2: Formula: (and (= (let ((.cse0 (mod |v_ULTIMATE.start_main_#t~mem31#1_5| 4294967296))) (ite (<= .cse0 2147483647) .cse0 (+ (- 4294967296) .cse0))) v_thread2Thread1of1ForFork0_thidvar0_4) (= v_thread2Thread1of1ForFork0_thidvar2_4 0) (= v_thread2Thread1of1ForFork0_thidvar1_4 0)) InVars {ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} OutVars{ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} AuxVars[] AssignedVars[][241], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 1161#(<= 1 ~N~0), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 2191#(= ~res1~0 0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 200#L103-2true, 245#true, 19#L80true, 279#(<= 1 ~N~0), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,731 INFO L384 tUnfolder$Statistics]: this new event has 192 ancestors and is cut-off event [2022-07-21 09:04:09,731 INFO L387 tUnfolder$Statistics]: existing Event has 183 ancestors and is cut-off event [2022-07-21 09:04:09,731 INFO L387 tUnfolder$Statistics]: existing Event has 176 ancestors and is cut-off event [2022-07-21 09:04:09,731 INFO L387 tUnfolder$Statistics]: existing Event has 160 ancestors and is cut-off event [2022-07-21 09:04:09,734 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([915] thread2EXIT-->L103-2: Formula: (and (= (let ((.cse0 (mod |v_ULTIMATE.start_main_#t~mem31#1_5| 4294967296))) (ite (<= .cse0 2147483647) .cse0 (+ (- 4294967296) .cse0))) v_thread2Thread1of1ForFork0_thidvar0_4) (= v_thread2Thread1of1ForFork0_thidvar2_4 0) (= v_thread2Thread1of1ForFork0_thidvar1_4 0)) InVars {ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} OutVars{ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} AuxVars[] AssignedVars[][238], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 1161#(<= 1 ~N~0), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 2148#true, 200#L103-2true, 245#true, 19#L80true, 279#(<= 1 ~N~0), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,734 INFO L384 tUnfolder$Statistics]: this new event has 199 ancestors and is cut-off event [2022-07-21 09:04:09,734 INFO L387 tUnfolder$Statistics]: existing Event has 190 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L387 tUnfolder$Statistics]: existing Event has 183 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L387 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 2191#(= ~res1~0 0), 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 171#L75-4true, 35#L102-2true, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,735 INFO L384 tUnfolder$Statistics]: this new event has 193 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L387 tUnfolder$Statistics]: existing Event has 177 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-21 09:04:09,735 INFO L387 tUnfolder$Statistics]: existing Event has 177 ancestors and is cut-off event [2022-07-21 09:04:09,736 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 2148#true, 171#L75-4true, 35#L102-2true, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-21 09:04:09,737 INFO L384 tUnfolder$Statistics]: this new event has 200 ancestors and is cut-off event [2022-07-21 09:04:09,737 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-21 09:04:09,737 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-21 09:04:09,737 INFO L387 tUnfolder$Statistics]: existing Event has 191 ancestors and is cut-off event [2022-07-21 09:04:09,737 INFO L129 PetriNetUnfolder]: 188/1232 cut-off events. [2022-07-21 09:04:09,737 INFO L130 PetriNetUnfolder]: For 208/240 co-relation queries the response was YES. [2022-07-21 09:04:09,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 1232 events. 188/1232 cut-off events. For 208/240 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7344 event pairs, 7 based on Foata normal form. 2/1154 useless extension candidates. Maximal degree in co-relation 1800. Up to 77 conditions per place. [2022-07-21 09:04:09,748 INFO L132 encePairwiseOnDemand]: 249/257 looper letters, 47 selfloop transitions, 6 changer transitions 4/257 dead transitions. [2022-07-21 09:04:09,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 257 transitions, 755 flow [2022-07-21 09:04:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:04:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:04:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1246 transitions. [2022-07-21 09:04:09,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.808041504539559 [2022-07-21 09:04:09,750 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1246 transitions. [2022-07-21 09:04:09,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1246 transitions. [2022-07-21 09:04:09,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:09,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1246 transitions. [2022-07-21 09:04:09,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.66666666666666) internal successors, (1246), 6 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:04:09,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 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 09:04:09,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 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 09:04:09,755 INFO L186 Difference]: Start difference. First operand has 240 places, 235 transitions, 588 flow. Second operand 6 states and 1246 transitions. [2022-07-21 09:04:09,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 257 transitions, 755 flow [2022-07-21 09:04:09,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 257 transitions, 748 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:04:09,761 INFO L242 Difference]: Finished difference. Result has 244 places, 239 transitions, 617 flow [2022-07-21 09:04:09,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=244, PETRI_TRANSITIONS=239} [2022-07-21 09:04:09,762 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 16 predicate places. [2022-07-21 09:04:09,762 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 239 transitions, 617 flow [2022-07-21 09:04:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 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 09:04:09,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:09,763 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:09,783 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 09:04:09,978 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 09:04:09,978 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 09:04:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2013812326, now seen corresponding path program 1 times [2022-07-21 09:04:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454972652] [2022-07-21 09:04:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:10,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454972652] [2022-07-21 09:04:10,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454972652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83339369] [2022-07-21 09:04:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:10,111 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 09:04:10,125 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 09:04:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:04:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:10,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83339369] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:10,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:04:10,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-21 09:04:10,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324091232] [2022-07-21 09:04:10,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:04:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:04:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:04:10,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 257 [2022-07-21 09:04:10,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 239 transitions, 617 flow. Second operand has 9 states, 9 states have (on average 189.22222222222223) internal successors, (1703), 9 states have internal predecessors, (1703), 0 states have call successors, (0), 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 09:04:10,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:10,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 257 [2022-07-21 09:04:10,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:12,009 INFO L129 PetriNetUnfolder]: 4159/10926 cut-off events. [2022-07-21 09:04:12,010 INFO L130 PetriNetUnfolder]: For 6685/7637 co-relation queries the response was YES. [2022-07-21 09:04:12,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22589 conditions, 10926 events. 4159/10926 cut-off events. For 6685/7637 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 110574 event pairs, 712 based on Foata normal form. 938/10972 useless extension candidates. Maximal degree in co-relation 22572. Up to 1647 conditions per place. [2022-07-21 09:04:12,154 INFO L132 encePairwiseOnDemand]: 246/257 looper letters, 143 selfloop transitions, 27 changer transitions 0/336 dead transitions. [2022-07-21 09:04:12,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 336 transitions, 1373 flow [2022-07-21 09:04:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:04:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:04:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2156 transitions. [2022-07-21 09:04:12,158 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7626459143968871 [2022-07-21 09:04:12,158 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2156 transitions. [2022-07-21 09:04:12,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2156 transitions. [2022-07-21 09:04:12,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:12,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2156 transitions. [2022-07-21 09:04:12,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.0) internal successors, (2156), 11 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 09:04:12,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:12,166 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 09:04:12,166 INFO L186 Difference]: Start difference. First operand has 244 places, 239 transitions, 617 flow. Second operand 11 states and 2156 transitions. [2022-07-21 09:04:12,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 336 transitions, 1373 flow [2022-07-21 09:04:12,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 336 transitions, 1369 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:04:12,188 INFO L242 Difference]: Finished difference. Result has 254 places, 256 transitions, 810 flow [2022-07-21 09:04:12,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=810, PETRI_PLACES=254, PETRI_TRANSITIONS=256} [2022-07-21 09:04:12,189 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 26 predicate places. [2022-07-21 09:04:12,189 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 256 transitions, 810 flow [2022-07-21 09:04:12,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.22222222222223) internal successors, (1703), 9 states have internal predecessors, (1703), 0 states have call successors, (0), 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 09:04:12,190 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:12,190 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:12,232 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 09:04:12,435 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 09:04:12,436 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 09:04:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2072175892, now seen corresponding path program 2 times [2022-07-21 09:04:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:12,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099661769] [2022-07-21 09:04:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:04:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099661769] [2022-07-21 09:04:12,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099661769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108075082] [2022-07-21 09:04:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:04:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:12,534 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 09:04:12,536 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 09:04:12,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:04:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:04:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:04:12,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:04:12,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108075082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:12,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:04:12,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-21 09:04:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277968047] [2022-07-21 09:04:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:12,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:04:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:04:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:04:12,793 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 257 [2022-07-21 09:04:12,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 256 transitions, 810 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 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 09:04:12,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:12,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 257 [2022-07-21 09:04:12,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:13,614 INFO L129 PetriNetUnfolder]: 1952/6198 cut-off events. [2022-07-21 09:04:13,614 INFO L130 PetriNetUnfolder]: For 6059/6619 co-relation queries the response was YES. [2022-07-21 09:04:13,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13211 conditions, 6198 events. 1952/6198 cut-off events. For 6059/6619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 59031 event pairs, 360 based on Foata normal form. 581/6221 useless extension candidates. Maximal degree in co-relation 13191. Up to 1798 conditions per place. [2022-07-21 09:04:13,663 INFO L132 encePairwiseOnDemand]: 248/257 looper letters, 65 selfloop transitions, 18 changer transitions 0/261 dead transitions. [2022-07-21 09:04:13,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 261 transitions, 983 flow [2022-07-21 09:04:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:04:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:04:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1531 transitions. [2022-07-21 09:04:13,666 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7446498054474708 [2022-07-21 09:04:13,666 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1531 transitions. [2022-07-21 09:04:13,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1531 transitions. [2022-07-21 09:04:13,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:13,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1531 transitions. [2022-07-21 09:04:13,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 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 09:04:13,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 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 09:04:13,672 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 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 09:04:13,672 INFO L186 Difference]: Start difference. First operand has 254 places, 256 transitions, 810 flow. Second operand 8 states and 1531 transitions. [2022-07-21 09:04:13,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 261 transitions, 983 flow [2022-07-21 09:04:13,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 261 transitions, 951 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-21 09:04:13,688 INFO L242 Difference]: Finished difference. Result has 252 places, 249 transitions, 768 flow [2022-07-21 09:04:13,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=768, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2022-07-21 09:04:13,689 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 24 predicate places. [2022-07-21 09:04:13,689 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 768 flow [2022-07-21 09:04:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 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 09:04:13,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:13,690 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:13,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 09:04:13,923 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 09:04:13,923 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 09:04:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash -969792038, now seen corresponding path program 1 times [2022-07-21 09:04:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378796983] [2022-07-21 09:04:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:14,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378796983] [2022-07-21 09:04:14,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378796983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:14,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:14,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:04:14,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686765297] [2022-07-21 09:04:14,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:04:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:04:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:04:14,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 257 [2022-07-21 09:04:14,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 768 flow. Second operand has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 09:04:14,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:14,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 257 [2022-07-21 09:04:14,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:28,649 INFO L129 PetriNetUnfolder]: 57483/126228 cut-off events. [2022-07-21 09:04:28,650 INFO L130 PetriNetUnfolder]: For 44485/45680 co-relation queries the response was YES. [2022-07-21 09:04:29,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245745 conditions, 126228 events. 57483/126228 cut-off events. For 44485/45680 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 1584873 event pairs, 27819 based on Foata normal form. 554/116579 useless extension candidates. Maximal degree in co-relation 245728. Up to 28157 conditions per place. [2022-07-21 09:04:29,907 INFO L132 encePairwiseOnDemand]: 237/257 looper letters, 255 selfloop transitions, 36 changer transitions 0/462 dead transitions. [2022-07-21 09:04:29,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 462 transitions, 1935 flow [2022-07-21 09:04:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:04:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-21 09:04:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3117 transitions. [2022-07-21 09:04:29,914 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7134355687800412 [2022-07-21 09:04:29,914 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3117 transitions. [2022-07-21 09:04:29,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3117 transitions. [2022-07-21 09:04:29,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3117 transitions. [2022-07-21 09:04:29,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 183.35294117647058) internal successors, (3117), 17 states have internal predecessors, (3117), 0 states have call successors, (0), 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 09:04:29,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 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 09:04:29,936 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 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 09:04:29,936 INFO L186 Difference]: Start difference. First operand has 252 places, 249 transitions, 768 flow. Second operand 17 states and 3117 transitions. [2022-07-21 09:04:29,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 462 transitions, 1935 flow [2022-07-21 09:04:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 462 transitions, 1915 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:04:30,533 INFO L242 Difference]: Finished difference. Result has 273 places, 283 transitions, 985 flow [2022-07-21 09:04:30,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=985, PETRI_PLACES=273, PETRI_TRANSITIONS=283} [2022-07-21 09:04:30,536 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 45 predicate places. [2022-07-21 09:04:30,536 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 283 transitions, 985 flow [2022-07-21 09:04:30,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 09:04:30,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:30,537 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:04:30,538 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 09:04:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1919021816, now seen corresponding path program 1 times [2022-07-21 09:04:30,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:30,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745155551] [2022-07-21 09:04:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745155551] [2022-07-21 09:04:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745155551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:30,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:04:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757692205] [2022-07-21 09:04:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:04:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:04:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:04:30,692 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 257 [2022-07-21 09:04:30,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 283 transitions, 985 flow. Second operand has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 09:04:30,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:30,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 257 [2022-07-21 09:04:30,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:43,340 INFO L129 PetriNetUnfolder]: 51910/95256 cut-off events. [2022-07-21 09:04:43,340 INFO L130 PetriNetUnfolder]: For 78570/79858 co-relation queries the response was YES. [2022-07-21 09:04:44,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232803 conditions, 95256 events. 51910/95256 cut-off events. For 78570/79858 co-relation queries the response was YES. Maximal size of possible extension queue 3274. Compared 1033801 event pairs, 22608 based on Foata normal form. 1046/91950 useless extension candidates. Maximal degree in co-relation 232776. Up to 29133 conditions per place. [2022-07-21 09:04:44,514 INFO L132 encePairwiseOnDemand]: 239/257 looper letters, 288 selfloop transitions, 21 changer transitions 2/478 dead transitions. [2022-07-21 09:04:44,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 478 transitions, 2374 flow [2022-07-21 09:04:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:04:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:04:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2737 transitions. [2022-07-21 09:04:44,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7099870298313878 [2022-07-21 09:04:44,520 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2737 transitions. [2022-07-21 09:04:44,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2737 transitions. [2022-07-21 09:04:44,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:44,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2737 transitions. [2022-07-21 09:04:44,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.46666666666667) internal successors, (2737), 15 states have internal predecessors, (2737), 0 states have call successors, (0), 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 09:04:44,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 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 09:04:44,530 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 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 09:04:44,530 INFO L186 Difference]: Start difference. First operand has 273 places, 283 transitions, 985 flow. Second operand 15 states and 2737 transitions. [2022-07-21 09:04:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 478 transitions, 2374 flow [2022-07-21 09:04:45,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 478 transitions, 2367 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:04:45,422 INFO L242 Difference]: Finished difference. Result has 293 places, 297 transitions, 1149 flow [2022-07-21 09:04:45,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1149, PETRI_PLACES=293, PETRI_TRANSITIONS=297} [2022-07-21 09:04:45,423 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 65 predicate places. [2022-07-21 09:04:45,423 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 297 transitions, 1149 flow [2022-07-21 09:04:45,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 09:04:45,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:45,424 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:45,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:04:45,424 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 09:04:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash 886910242, now seen corresponding path program 2 times [2022-07-21 09:04:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:45,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837046333] [2022-07-21 09:04:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:45,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837046333] [2022-07-21 09:04:45,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837046333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:04:45,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:04:45,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:04:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972588633] [2022-07-21 09:04:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:04:45,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:04:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:04:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:04:45,684 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 257 [2022-07-21 09:04:45,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 297 transitions, 1149 flow. Second operand has 19 states, 19 states have (on average 150.21052631578948) internal successors, (2854), 19 states have internal predecessors, (2854), 0 states have call successors, (0), 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 09:04:45,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:45,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 257 [2022-07-21 09:04:45,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand