./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/chl-array-int-symm.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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:23:55,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:23:55,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:23:55,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:23:55,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:23:55,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:23:55,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:23:55,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:23:55,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:23:55,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:23:55,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:23:55,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:23:55,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:23:55,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:23:55,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:23:55,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:23:55,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:23:55,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:23:55,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:23:55,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:23:55,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:23:55,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:23:55,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:23:55,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:23:55,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:23:55,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:23:55,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:23:55,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:23:55,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:23:55,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:23:55,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:23:55,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:23:55,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:23:55,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:23:55,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:23:55,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:23:55,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:23:55,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:23:55,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:23:55,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:23:55,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:23:55,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:23:55,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:23:55,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:23:55,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:23:55,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:23:55,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:23:55,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:23:55,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:23:55,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:23:55,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:23:55,863 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:23:55,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:23:55,863 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:23:55,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:23:55,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:23:55,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:23:55,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:23:55,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:23:55,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:23:55,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:23:55,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:55,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:23:55,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:23:55,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-07-19 21:23:56,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:23:56,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:23:56,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:23:56,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:23:56,031 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:23:56,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-19 21:23:56,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06be4db9/8d673baa9d014c34822c9fa9df80d50b/FLAGfad191bd2 [2022-07-19 21:23:56,526 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:23:56,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-19 21:23:56,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06be4db9/8d673baa9d014c34822c9fa9df80d50b/FLAGfad191bd2 [2022-07-19 21:23:56,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06be4db9/8d673baa9d014c34822c9fa9df80d50b [2022-07-19 21:23:56,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:23:56,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:23:56,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:56,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:23:56,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:23:56,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:56" (1/1) ... [2022-07-19 21:23:56,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8f54f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:56, skipping insertion in model container [2022-07-19 21:23:56,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:56" (1/1) ... [2022-07-19 21:23:56,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:23:56,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:23:57,088 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/chl-array-int-symm.wvr.c[2482,2495] [2022-07-19 21:23:57,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:57,100 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:23:57,118 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/chl-array-int-symm.wvr.c[2482,2495] [2022-07-19 21:23:57,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:57,130 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:23:57,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57 WrapperNode [2022-07-19 21:23:57,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:57,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:57,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:23:57,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:23:57,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,163 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 198 [2022-07-19 21:23:57,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:57,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:23:57,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:23:57,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:23:57,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:23:57,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:23:57,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:23:57,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:23:57,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:57,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:57,212 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) [2022-07-19 21:23:57,218 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 [2022-07-19 21:23:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:23:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:23:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:23:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:23:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:23:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:23:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:23:57,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:23:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:23:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:23:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:23:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:23:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:23:57,249 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:23:57,307 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:23:57,308 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:23:57,595 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:23:57,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:23:57,603 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:23:57,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:57 BoogieIcfgContainer [2022-07-19 21:23:57,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:23:57,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:23:57,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:23:57,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:23:57,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:23:56" (1/3) ... [2022-07-19 21:23:57,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661eca9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:57, skipping insertion in model container [2022-07-19 21:23:57,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57" (2/3) ... [2022-07-19 21:23:57,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661eca9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:57, skipping insertion in model container [2022-07-19 21:23:57,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:57" (3/3) ... [2022-07-19 21:23:57,612 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-07-19 21:23:57,616 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:23:57,622 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:23:57,622 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:23:57,623 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:23:57,683 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:23:57,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 258 transitions, 532 flow [2022-07-19 21:23:57,767 INFO L129 PetriNetUnfolder]: 21/256 cut-off events. [2022-07-19 21:23:57,768 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:23:57,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 21/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 347 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-07-19 21:23:57,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 258 transitions, 532 flow [2022-07-19 21:23:57,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 247 transitions, 506 flow [2022-07-19 21:23:57,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:23:57,791 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@78d71d32, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d8d4dfa [2022-07-19 21:23:57,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:23:57,821 INFO L129 PetriNetUnfolder]: 21/246 cut-off events. [2022-07-19 21:23:57,822 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:23:57,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:57,823 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] [2022-07-19 21:23:57,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:23:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash 727559992, now seen corresponding path program 1 times [2022-07-19 21:23:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655013113] [2022-07-19 21:23:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:58,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655013113] [2022-07-19 21:23:58,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655013113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:58,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:58,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:23:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328706343] [2022-07-19 21:23:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:23:58,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:58,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:23:58,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:23:58,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 258 [2022-07-19 21:23:58,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 247 transitions, 506 flow. Second operand has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:58,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 258 [2022-07-19 21:23:58,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:58,116 INFO L129 PetriNetUnfolder]: 6/232 cut-off events. [2022-07-19 21:23:58,116 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:23:58,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 232 events. 6/232 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 17/232 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-07-19 21:23:58,133 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 4 selfloop transitions, 0 changer transitions 7/232 dead transitions. [2022-07-19 21:23:58,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 232 transitions, 484 flow [2022-07-19 21:23:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:23:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:23:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 495 transitions. [2022-07-19 21:23:58,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9593023255813954 [2022-07-19 21:23:58,145 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 495 transitions. [2022-07-19 21:23:58,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 495 transitions. [2022-07-19 21:23:58,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:58,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 495 transitions. [2022-07-19 21:23:58,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,158 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,160 INFO L186 Difference]: Start difference. First operand has 233 places, 247 transitions, 506 flow. Second operand 2 states and 495 transitions. [2022-07-19 21:23:58,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 232 transitions, 484 flow [2022-07-19 21:23:58,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 232 transitions, 476 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:23:58,167 INFO L242 Difference]: Finished difference. Result has 230 places, 225 transitions, 454 flow [2022-07-19 21:23:58,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=454, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2022-07-19 21:23:58,171 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, -3 predicate places. [2022-07-19 21:23:58,172 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 454 flow [2022-07-19 21:23:58,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:58,173 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] [2022-07-19 21:23:58,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:23:58,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:23:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -38155261, now seen corresponding path program 1 times [2022-07-19 21:23:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571740717] [2022-07-19 21:23:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:58,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571740717] [2022-07-19 21:23:58,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571740717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:58,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:58,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:23:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440898297] [2022-07-19 21:23:58,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:23:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:23:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:23:58,924 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-19 21:23:58,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 454 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:58,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:58,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-19 21:23:58,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:00,024 INFO L129 PetriNetUnfolder]: 144/1812 cut-off events. [2022-07-19 21:24:00,024 INFO L130 PetriNetUnfolder]: For 28/34 co-relation queries the response was YES. [2022-07-19 21:24:00,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 1812 events. 144/1812 cut-off events. For 28/34 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13685 event pairs, 57 based on Foata normal form. 1/1645 useless extension candidates. Maximal degree in co-relation 2174. Up to 94 conditions per place. [2022-07-19 21:24:00,034 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 141 selfloop transitions, 27 changer transitions 12/339 dead transitions. [2022-07-19 21:24:00,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 1055 flow [2022-07-19 21:24:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:24:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:24:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4237 transitions. [2022-07-19 21:24:00,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6842700258397932 [2022-07-19 21:24:00,042 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4237 transitions. [2022-07-19 21:24:00,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4237 transitions. [2022-07-19 21:24:00,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:00,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4237 transitions. [2022-07-19 21:24:00,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.54166666666666) internal successors, (4237), 24 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:00,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:00,061 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:00,061 INFO L186 Difference]: Start difference. First operand has 230 places, 225 transitions, 454 flow. Second operand 24 states and 4237 transitions. [2022-07-19 21:24:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 1055 flow [2022-07-19 21:24:00,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 339 transitions, 1055 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:24:00,066 INFO L242 Difference]: Finished difference. Result has 258 places, 241 transitions, 602 flow [2022-07-19 21:24:00,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=602, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-07-19 21:24:00,067 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 25 predicate places. [2022-07-19 21:24:00,067 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 602 flow [2022-07-19 21:24:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:00,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:00,069 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] [2022-07-19 21:24:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:24:00,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -411240785, now seen corresponding path program 2 times [2022-07-19 21:24:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:00,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346338862] [2022-07-19 21:24:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346338862] [2022-07-19 21:24:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346338862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:00,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:00,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:24:00,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72747061] [2022-07-19 21:24:00,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:24:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:24:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:00,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-19 21:24:00,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 241 transitions, 602 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:00,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:00,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-19 21:24:00,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:01,288 INFO L129 PetriNetUnfolder]: 140/1844 cut-off events. [2022-07-19 21:24:01,289 INFO L130 PetriNetUnfolder]: For 204/212 co-relation queries the response was YES. [2022-07-19 21:24:01,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 1844 events. 140/1844 cut-off events. For 204/212 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13769 event pairs, 54 based on Foata normal form. 5/1688 useless extension candidates. Maximal degree in co-relation 2403. Up to 94 conditions per place. [2022-07-19 21:24:01,299 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 140 selfloop transitions, 29 changer transitions 12/340 dead transitions. [2022-07-19 21:24:01,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 340 transitions, 1224 flow [2022-07-19 21:24:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:24:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:24:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4236 transitions. [2022-07-19 21:24:01,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6841085271317829 [2022-07-19 21:24:01,307 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4236 transitions. [2022-07-19 21:24:01,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4236 transitions. [2022-07-19 21:24:01,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:01,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4236 transitions. [2022-07-19 21:24:01,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.5) internal successors, (4236), 24 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:01,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:01,326 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:01,326 INFO L186 Difference]: Start difference. First operand has 258 places, 241 transitions, 602 flow. Second operand 24 states and 4236 transitions. [2022-07-19 21:24:01,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 340 transitions, 1224 flow [2022-07-19 21:24:01,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 340 transitions, 1190 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-07-19 21:24:01,335 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 695 flow [2022-07-19 21:24:01,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=695, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-19 21:24:01,337 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-19 21:24:01,337 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 695 flow [2022-07-19 21:24:01,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:01,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:01,340 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] [2022-07-19 21:24:01,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:24:01,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1619395327, now seen corresponding path program 1 times [2022-07-19 21:24:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521658369] [2022-07-19 21:24:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:01,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521658369] [2022-07-19 21:24:01,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521658369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814627441] [2022-07-19 21:24:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:01,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:01,575 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) [2022-07-19 21:24:01,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:24:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:24:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:02,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814627441] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:02,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:02,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-19 21:24:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136377231] [2022-07-19 21:24:02,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:02,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:24:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:24:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-19 21:24:02,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-19 21:24:02,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 695 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:02,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:02,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-19 21:24:02,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:02,871 INFO L129 PetriNetUnfolder]: 191/2490 cut-off events. [2022-07-19 21:24:02,873 INFO L130 PetriNetUnfolder]: For 617/639 co-relation queries the response was YES. [2022-07-19 21:24:02,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 2490 events. 191/2490 cut-off events. For 617/639 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 20934 event pairs, 83 based on Foata normal form. 3/2268 useless extension candidates. Maximal degree in co-relation 3353. Up to 223 conditions per place. [2022-07-19 21:24:02,888 INFO L132 encePairwiseOnDemand]: 239/258 looper letters, 149 selfloop transitions, 25 changer transitions 8/341 dead transitions. [2022-07-19 21:24:02,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 341 transitions, 1339 flow [2022-07-19 21:24:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:24:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:24:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3212 transitions. [2022-07-19 21:24:02,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6916451335055986 [2022-07-19 21:24:02,894 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3212 transitions. [2022-07-19 21:24:02,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3212 transitions. [2022-07-19 21:24:02,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:02,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3212 transitions. [2022-07-19 21:24:02,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.44444444444446) internal successors, (3212), 18 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:02,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:02,907 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:02,907 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 695 flow. Second operand 18 states and 3212 transitions. [2022-07-19 21:24:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 341 transitions, 1339 flow [2022-07-19 21:24:02,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 341 transitions, 1278 flow, removed 9 selfloop flow, removed 20 redundant places. [2022-07-19 21:24:02,916 INFO L242 Difference]: Finished difference. Result has 275 places, 257 transitions, 777 flow [2022-07-19 21:24:02,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=777, PETRI_PLACES=275, PETRI_TRANSITIONS=257} [2022-07-19 21:24:02,918 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-19 21:24:02,918 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 257 transitions, 777 flow [2022-07-19 21:24:02,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:02,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:02,919 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] [2022-07-19 21:24:02,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:24:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:03,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1111966459, now seen corresponding path program 2 times [2022-07-19 21:24:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156267438] [2022-07-19 21:24:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:03,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:03,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156267438] [2022-07-19 21:24:03,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156267438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:03,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618809477] [2022-07-19 21:24:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:24:03,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:03,340 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) [2022-07-19 21:24:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:24:03,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:24:03,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:24:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:24:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:03,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:24:03,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618809477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:03,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:24:03,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-07-19 21:24:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216412680] [2022-07-19 21:24:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:03,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:24:03,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:03,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:24:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:24:03,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-19 21:24:03,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 257 transitions, 777 flow. Second operand has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:03,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:03,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-19 21:24:03,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:04,288 INFO L129 PetriNetUnfolder]: 221/3054 cut-off events. [2022-07-19 21:24:04,289 INFO L130 PetriNetUnfolder]: For 1334/1384 co-relation queries the response was YES. [2022-07-19 21:24:04,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 3054 events. 221/3054 cut-off events. For 1334/1384 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 30 based on Foata normal form. 15/2795 useless extension candidates. Maximal degree in co-relation 4262. Up to 234 conditions per place. [2022-07-19 21:24:04,305 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 16 changer transitions 12/297 dead transitions. [2022-07-19 21:24:04,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 297 transitions, 1146 flow [2022-07-19 21:24:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:24:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:24:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2705 transitions. [2022-07-19 21:24:04,309 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7488925802879292 [2022-07-19 21:24:04,310 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2705 transitions. [2022-07-19 21:24:04,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2705 transitions. [2022-07-19 21:24:04,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:04,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2705 transitions. [2022-07-19 21:24:04,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.21428571428572) internal successors, (2705), 14 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:04,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:04,326 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:04,326 INFO L186 Difference]: Start difference. First operand has 275 places, 257 transitions, 777 flow. Second operand 14 states and 2705 transitions. [2022-07-19 21:24:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 297 transitions, 1146 flow [2022-07-19 21:24:04,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 297 transitions, 1085 flow, removed 21 selfloop flow, removed 9 redundant places. [2022-07-19 21:24:04,333 INFO L242 Difference]: Finished difference. Result has 289 places, 262 transitions, 858 flow [2022-07-19 21:24:04,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=289, PETRI_TRANSITIONS=262} [2022-07-19 21:24:04,334 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 56 predicate places. [2022-07-19 21:24:04,334 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 262 transitions, 858 flow [2022-07-19 21:24:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:04,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:04,335 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] [2022-07-19 21:24:04,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:04,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:04,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1904163694, now seen corresponding path program 1 times [2022-07-19 21:24:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:04,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211015828] [2022-07-19 21:24:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:04,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211015828] [2022-07-19 21:24:04,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211015828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505867763] [2022-07-19 21:24:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:04,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:04,710 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) [2022-07-19 21:24:04,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:24:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:24:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:05,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:05,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505867763] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:05,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:05,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-19 21:24:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801642632] [2022-07-19 21:24:05,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:24:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:24:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-19 21:24:05,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-19 21:24:05,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 262 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:05,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:05,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-19 21:24:05,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:06,045 INFO L129 PetriNetUnfolder]: 223/3065 cut-off events. [2022-07-19 21:24:06,046 INFO L130 PetriNetUnfolder]: For 2066/2136 co-relation queries the response was YES. [2022-07-19 21:24:06,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4552 conditions, 3065 events. 223/3065 cut-off events. For 2066/2136 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 91 based on Foata normal form. 7/2789 useless extension candidates. Maximal degree in co-relation 4521. Up to 258 conditions per place. [2022-07-19 21:24:06,063 INFO L132 encePairwiseOnDemand]: 236/258 looper letters, 154 selfloop transitions, 29 changer transitions 4/346 dead transitions. [2022-07-19 21:24:06,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 346 transitions, 1599 flow [2022-07-19 21:24:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:24:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:24:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3546 transitions. [2022-07-19 21:24:06,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6872093023255814 [2022-07-19 21:24:06,070 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3546 transitions. [2022-07-19 21:24:06,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3546 transitions. [2022-07-19 21:24:06,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:06,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3546 transitions. [2022-07-19 21:24:06,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 177.3) internal successors, (3546), 20 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:06,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:06,096 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:06,096 INFO L186 Difference]: Start difference. First operand has 289 places, 262 transitions, 858 flow. Second operand 20 states and 3546 transitions. [2022-07-19 21:24:06,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 346 transitions, 1599 flow [2022-07-19 21:24:06,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 346 transitions, 1476 flow, removed 54 selfloop flow, removed 11 redundant places. [2022-07-19 21:24:06,105 INFO L242 Difference]: Finished difference. Result has 293 places, 270 transitions, 995 flow [2022-07-19 21:24:06,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=995, PETRI_PLACES=293, PETRI_TRANSITIONS=270} [2022-07-19 21:24:06,107 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 60 predicate places. [2022-07-19 21:24:06,108 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 270 transitions, 995 flow [2022-07-19 21:24:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:06,108 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:06,109 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] [2022-07-19 21:24:06,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:24:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:06,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1602370668, now seen corresponding path program 1 times [2022-07-19 21:24:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397571499] [2022-07-19 21:24:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:06,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:06,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397571499] [2022-07-19 21:24:06,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397571499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:06,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351449966] [2022-07-19 21:24:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:06,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:06,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:06,456 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) [2022-07-19 21:24:06,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:24:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:24:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:06,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:07,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351449966] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:07,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-19 21:24:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121650510] [2022-07-19 21:24:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:24:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:24:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:24:07,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-19 21:24:07,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 270 transitions, 995 flow. Second operand has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:07,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:07,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-19 21:24:07,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:07,722 INFO L129 PetriNetUnfolder]: 402/3869 cut-off events. [2022-07-19 21:24:07,722 INFO L130 PetriNetUnfolder]: For 2031/2039 co-relation queries the response was YES. [2022-07-19 21:24:07,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 3869 events. 402/3869 cut-off events. For 2031/2039 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 36099 event pairs, 135 based on Foata normal form. 3/3514 useless extension candidates. Maximal degree in co-relation 5637. Up to 234 conditions per place. [2022-07-19 21:24:07,748 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 106 selfloop transitions, 22 changer transitions 0/326 dead transitions. [2022-07-19 21:24:07,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 326 transitions, 1451 flow [2022-07-19 21:24:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:24:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:24:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3658 transitions. [2022-07-19 21:24:07,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7876830318690784 [2022-07-19 21:24:07,784 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3658 transitions. [2022-07-19 21:24:07,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3658 transitions. [2022-07-19 21:24:07,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:07,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3658 transitions. [2022-07-19 21:24:07,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.22222222222223) internal successors, (3658), 18 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:07,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:07,798 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:07,799 INFO L186 Difference]: Start difference. First operand has 293 places, 270 transitions, 995 flow. Second operand 18 states and 3658 transitions. [2022-07-19 21:24:07,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 326 transitions, 1451 flow [2022-07-19 21:24:07,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 326 transitions, 1386 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-07-19 21:24:07,810 INFO L242 Difference]: Finished difference. Result has 301 places, 276 transitions, 1003 flow [2022-07-19 21:24:07,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1003, PETRI_PLACES=301, PETRI_TRANSITIONS=276} [2022-07-19 21:24:07,812 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-19 21:24:07,812 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 276 transitions, 1003 flow [2022-07-19 21:24:07,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:07,812 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:07,813 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] [2022-07-19 21:24:07,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:08,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:08,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1108619878, now seen corresponding path program 1 times [2022-07-19 21:24:08,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:08,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630935321] [2022-07-19 21:24:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:08,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:08,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630935321] [2022-07-19 21:24:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630935321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055842303] [2022-07-19 21:24:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:08,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:08,160 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) [2022-07-19 21:24:08,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:24:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:24:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:08,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055842303] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:08,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:08,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-19 21:24:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900730141] [2022-07-19 21:24:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:08,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:24:08,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:24:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:24:08,698 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-19 21:24:08,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 276 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:08,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:08,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-19 21:24:08,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:09,478 INFO L129 PetriNetUnfolder]: 376/4097 cut-off events. [2022-07-19 21:24:09,478 INFO L130 PetriNetUnfolder]: For 2162/2170 co-relation queries the response was YES. [2022-07-19 21:24:09,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6114 conditions, 4097 events. 376/4097 cut-off events. For 2162/2170 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 39381 event pairs, 123 based on Foata normal form. 6/3817 useless extension candidates. Maximal degree in co-relation 6086. Up to 202 conditions per place. [2022-07-19 21:24:09,499 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 112 selfloop transitions, 22 changer transitions 0/335 dead transitions. [2022-07-19 21:24:09,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 335 transitions, 1518 flow [2022-07-19 21:24:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:24:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:24:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3661 transitions. [2022-07-19 21:24:09,503 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7883290267011197 [2022-07-19 21:24:09,503 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3661 transitions. [2022-07-19 21:24:09,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3661 transitions. [2022-07-19 21:24:09,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:09,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3661 transitions. [2022-07-19 21:24:09,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.38888888888889) internal successors, (3661), 18 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:09,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:09,513 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:09,513 INFO L186 Difference]: Start difference. First operand has 301 places, 276 transitions, 1003 flow. Second operand 18 states and 3661 transitions. [2022-07-19 21:24:09,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 335 transitions, 1518 flow [2022-07-19 21:24:09,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 335 transitions, 1493 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-19 21:24:09,522 INFO L242 Difference]: Finished difference. Result has 310 places, 282 transitions, 1047 flow [2022-07-19 21:24:09,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1047, PETRI_PLACES=310, PETRI_TRANSITIONS=282} [2022-07-19 21:24:09,523 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 77 predicate places. [2022-07-19 21:24:09,524 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 282 transitions, 1047 flow [2022-07-19 21:24:09,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:09,524 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:09,524 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] [2022-07-19 21:24:09,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:09,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2275650, now seen corresponding path program 1 times [2022-07-19 21:24:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:09,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958606138] [2022-07-19 21:24:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:09,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:09,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958606138] [2022-07-19 21:24:09,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958606138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187807081] [2022-07-19 21:24:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:09,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:10,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:24:10,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:24:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:10,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 21:24:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:10,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:11,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187807081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:24:11,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:24:11,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2022-07-19 21:24:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180454469] [2022-07-19 21:24:11,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:24:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 21:24:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 21:24:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 21:24:11,536 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 258 [2022-07-19 21:24:11,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 282 transitions, 1047 flow. Second operand has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:11,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:11,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 258 [2022-07-19 21:24:11,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:13,454 INFO L129 PetriNetUnfolder]: 396/5497 cut-off events. [2022-07-19 21:24:13,455 INFO L130 PetriNetUnfolder]: For 3865/3969 co-relation queries the response was YES. [2022-07-19 21:24:13,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8530 conditions, 5497 events. 396/5497 cut-off events. For 3865/3969 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 55710 event pairs, 176 based on Foata normal form. 16/5147 useless extension candidates. Maximal degree in co-relation 8500. Up to 580 conditions per place. [2022-07-19 21:24:13,490 INFO L132 encePairwiseOnDemand]: 234/258 looper letters, 223 selfloop transitions, 49 changer transitions 12/447 dead transitions. [2022-07-19 21:24:13,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 447 transitions, 2392 flow [2022-07-19 21:24:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:24:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:24:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5732 transitions. [2022-07-19 21:24:13,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6732440685929058 [2022-07-19 21:24:13,496 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5732 transitions. [2022-07-19 21:24:13,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5732 transitions. [2022-07-19 21:24:13,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:13,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5732 transitions. [2022-07-19 21:24:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 173.6969696969697) internal successors, (5732), 33 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:13,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:13,512 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:13,512 INFO L186 Difference]: Start difference. First operand has 310 places, 282 transitions, 1047 flow. Second operand 33 states and 5732 transitions. [2022-07-19 21:24:13,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 447 transitions, 2392 flow [2022-07-19 21:24:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 2358 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-19 21:24:13,526 INFO L242 Difference]: Finished difference. Result has 343 places, 309 transitions, 1399 flow [2022-07-19 21:24:13,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1399, PETRI_PLACES=343, PETRI_TRANSITIONS=309} [2022-07-19 21:24:13,527 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 110 predicate places. [2022-07-19 21:24:13,527 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 309 transitions, 1399 flow [2022-07-19 21:24:13,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:13,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:13,529 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] [2022-07-19 21:24:13,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:13,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:13,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 685094907, now seen corresponding path program 1 times [2022-07-19 21:24:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380453380] [2022-07-19 21:24:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:13,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380453380] [2022-07-19 21:24:13,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380453380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:13,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:13,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:24:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655610066] [2022-07-19 21:24:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:13,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:13,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:24:13,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-19 21:24:13,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 309 transitions, 1399 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:13,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:13,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-19 21:24:13,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:14,542 INFO L129 PetriNetUnfolder]: 582/6515 cut-off events. [2022-07-19 21:24:14,543 INFO L130 PetriNetUnfolder]: For 5388/5422 co-relation queries the response was YES. [2022-07-19 21:24:14,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10345 conditions, 6515 events. 582/6515 cut-off events. For 5388/5422 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 69725 event pairs, 341 based on Foata normal form. 32/6127 useless extension candidates. Maximal degree in co-relation 10304. Up to 986 conditions per place. [2022-07-19 21:24:14,605 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 100 selfloop transitions, 14 changer transitions 2/321 dead transitions. [2022-07-19 21:24:14,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 321 transitions, 1662 flow [2022-07-19 21:24:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:24:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:24:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2022-07-19 21:24:14,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003875968992248 [2022-07-19 21:24:14,610 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2022-07-19 21:24:14,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2022-07-19 21:24:14,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:14,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2022-07-19 21:24:14,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:14,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:14,617 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:14,617 INFO L186 Difference]: Start difference. First operand has 343 places, 309 transitions, 1399 flow. Second operand 10 states and 2065 transitions. [2022-07-19 21:24:14,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 321 transitions, 1662 flow [2022-07-19 21:24:14,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 321 transitions, 1558 flow, removed 36 selfloop flow, removed 11 redundant places. [2022-07-19 21:24:14,634 INFO L242 Difference]: Finished difference. Result has 339 places, 304 transitions, 1289 flow [2022-07-19 21:24:14,636 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1289, PETRI_PLACES=339, PETRI_TRANSITIONS=304} [2022-07-19 21:24:14,636 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 106 predicate places. [2022-07-19 21:24:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 304 transitions, 1289 flow [2022-07-19 21:24:14,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:14,637 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:14,637 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] [2022-07-19 21:24:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:24:14,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1611315835, now seen corresponding path program 1 times [2022-07-19 21:24:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25398871] [2022-07-19 21:24:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:24:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25398871] [2022-07-19 21:24:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25398871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:14,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:14,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:24:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195270172] [2022-07-19 21:24:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:24:14,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-19 21:24:14,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 304 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:14,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:14,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-19 21:24:14,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:15,292 INFO L129 PetriNetUnfolder]: 597/5064 cut-off events. [2022-07-19 21:24:15,293 INFO L130 PetriNetUnfolder]: For 3584/3615 co-relation queries the response was YES. [2022-07-19 21:24:15,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 5064 events. 597/5064 cut-off events. For 3584/3615 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 49103 event pairs, 399 based on Foata normal form. 35/4747 useless extension candidates. Maximal degree in co-relation 8357. Up to 1127 conditions per place. [2022-07-19 21:24:15,339 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 69 selfloop transitions, 10 changer transitions 38/313 dead transitions. [2022-07-19 21:24:15,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 313 transitions, 1534 flow [2022-07-19 21:24:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:24:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:24:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2063 transitions. [2022-07-19 21:24:15,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996124031007752 [2022-07-19 21:24:15,342 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2063 transitions. [2022-07-19 21:24:15,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2063 transitions. [2022-07-19 21:24:15,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:15,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2063 transitions. [2022-07-19 21:24:15,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.3) internal successors, (2063), 10 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:15,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:15,347 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:15,347 INFO L186 Difference]: Start difference. First operand has 339 places, 304 transitions, 1289 flow. Second operand 10 states and 2063 transitions. [2022-07-19 21:24:15,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 313 transitions, 1534 flow [2022-07-19 21:24:15,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 313 transitions, 1492 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-07-19 21:24:15,360 INFO L242 Difference]: Finished difference. Result has 340 places, 274 transitions, 1025 flow [2022-07-19 21:24:15,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1025, PETRI_PLACES=340, PETRI_TRANSITIONS=274} [2022-07-19 21:24:15,362 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 107 predicate places. [2022-07-19 21:24:15,362 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 274 transitions, 1025 flow [2022-07-19 21:24:15,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:15,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:15,362 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:24:15,363 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1329761704, now seen corresponding path program 2 times [2022-07-19 21:24:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:15,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771895593] [2022-07-19 21:24:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771895593] [2022-07-19 21:24:15,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771895593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926772507] [2022-07-19 21:24:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:24:15,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:15,584 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:24:15,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:24:15,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:24:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:24:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 21:24:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 21:24:15,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:24:15,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926772507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:15,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:24:15,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2022-07-19 21:24:15,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224435661] [2022-07-19 21:24:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:24:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:24:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:24:15,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-19 21:24:15,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 274 transitions, 1025 flow. Second operand has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:15,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:15,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-19 21:24:15,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:16,753 INFO L129 PetriNetUnfolder]: 289/3868 cut-off events. [2022-07-19 21:24:16,754 INFO L130 PetriNetUnfolder]: For 3003/3102 co-relation queries the response was YES. [2022-07-19 21:24:16,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 3868 events. 289/3868 cut-off events. For 3003/3102 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 35476 event pairs, 30 based on Foata normal form. 33/3649 useless extension candidates. Maximal degree in co-relation 6097. Up to 338 conditions per place. [2022-07-19 21:24:16,789 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 21 changer transitions 12/316 dead transitions. [2022-07-19 21:24:16,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 316 transitions, 1419 flow [2022-07-19 21:24:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:24:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:24:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2704 transitions. [2022-07-19 21:24:16,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7486157253599114 [2022-07-19 21:24:16,792 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2704 transitions. [2022-07-19 21:24:16,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2704 transitions. [2022-07-19 21:24:16,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:16,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2704 transitions. [2022-07-19 21:24:16,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.14285714285714) internal successors, (2704), 14 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:16,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:16,799 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:16,799 INFO L186 Difference]: Start difference. First operand has 340 places, 274 transitions, 1025 flow. Second operand 14 states and 2704 transitions. [2022-07-19 21:24:16,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 316 transitions, 1419 flow [2022-07-19 21:24:16,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 316 transitions, 1296 flow, removed 32 selfloop flow, removed 23 redundant places. [2022-07-19 21:24:16,809 INFO L242 Difference]: Finished difference. Result has 315 places, 277 transitions, 1043 flow [2022-07-19 21:24:16,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1043, PETRI_PLACES=315, PETRI_TRANSITIONS=277} [2022-07-19 21:24:16,811 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 82 predicate places. [2022-07-19 21:24:16,811 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 277 transitions, 1043 flow [2022-07-19 21:24:16,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:16,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:16,812 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:16,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:17,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:17,029 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash -118345649, now seen corresponding path program 1 times [2022-07-19 21:24:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:17,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075815555] [2022-07-19 21:24:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:17,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:17,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075815555] [2022-07-19 21:24:17,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075815555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:17,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:17,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:24:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699618877] [2022-07-19 21:24:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:17,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:24:17,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-19 21:24:17,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 277 transitions, 1043 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:17,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-19 21:24:17,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:17,561 INFO L129 PetriNetUnfolder]: 404/4262 cut-off events. [2022-07-19 21:24:17,561 INFO L130 PetriNetUnfolder]: For 2969/3018 co-relation queries the response was YES. [2022-07-19 21:24:17,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 4262 events. 404/4262 cut-off events. For 2969/3018 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 40782 event pairs, 223 based on Foata normal form. 39/4013 useless extension candidates. Maximal degree in co-relation 6830. Up to 649 conditions per place. [2022-07-19 21:24:17,591 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 76 selfloop transitions, 13 changer transitions 2/288 dead transitions. [2022-07-19 21:24:17,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 288 transitions, 1270 flow [2022-07-19 21:24:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:24:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:24:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2022-07-19 21:24:17,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8018410852713178 [2022-07-19 21:24:17,593 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2022-07-19 21:24:17,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2022-07-19 21:24:17,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:17,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2022-07-19 21:24:17,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,597 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,597 INFO L186 Difference]: Start difference. First operand has 315 places, 277 transitions, 1043 flow. Second operand 8 states and 1655 transitions. [2022-07-19 21:24:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 288 transitions, 1270 flow [2022-07-19 21:24:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 288 transitions, 1204 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-07-19 21:24:17,608 INFO L242 Difference]: Finished difference. Result has 300 places, 275 transitions, 999 flow [2022-07-19 21:24:17,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=300, PETRI_TRANSITIONS=275} [2022-07-19 21:24:17,609 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 67 predicate places. [2022-07-19 21:24:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 275 transitions, 999 flow [2022-07-19 21:24:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:17,609 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:24:17,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1669631243, now seen corresponding path program 1 times [2022-07-19 21:24:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:17,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096434223] [2022-07-19 21:24:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:17,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:17,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096434223] [2022-07-19 21:24:17,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096434223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:17,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:17,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:24:17,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482466866] [2022-07-19 21:24:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:17,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:17,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:24:17,655 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-19 21:24:17,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 275 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:17,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:17,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-19 21:24:17,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:18,027 INFO L129 PetriNetUnfolder]: 398/3387 cut-off events. [2022-07-19 21:24:18,027 INFO L130 PetriNetUnfolder]: For 2178/2197 co-relation queries the response was YES. [2022-07-19 21:24:18,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 3387 events. 398/3387 cut-off events. For 2178/2197 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 29486 event pairs, 241 based on Foata normal form. 30/3164 useless extension candidates. Maximal degree in co-relation 5587. Up to 724 conditions per place. [2022-07-19 21:24:18,068 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 63 selfloop transitions, 10 changer transitions 17/282 dead transitions. [2022-07-19 21:24:18,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 282 transitions, 1192 flow [2022-07-19 21:24:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:24:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:24:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1653 transitions. [2022-07-19 21:24:18,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8008720930232558 [2022-07-19 21:24:18,070 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1653 transitions. [2022-07-19 21:24:18,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1653 transitions. [2022-07-19 21:24:18,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:18,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1653 transitions. [2022-07-19 21:24:18,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.625) internal successors, (1653), 8 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:18,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:18,074 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:18,074 INFO L186 Difference]: Start difference. First operand has 300 places, 275 transitions, 999 flow. Second operand 8 states and 1653 transitions. [2022-07-19 21:24:18,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 282 transitions, 1192 flow [2022-07-19 21:24:18,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 282 transitions, 1154 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-19 21:24:18,083 INFO L242 Difference]: Finished difference. Result has 301 places, 263 transitions, 888 flow [2022-07-19 21:24:18,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=301, PETRI_TRANSITIONS=263} [2022-07-19 21:24:18,084 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-19 21:24:18,084 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 263 transitions, 888 flow [2022-07-19 21:24:18,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:18,085 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:18,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:24:18,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1705634450, now seen corresponding path program 1 times [2022-07-19 21:24:18,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:18,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113206561] [2022-07-19 21:24:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:18,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113206561] [2022-07-19 21:24:18,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113206561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:18,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:18,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:24:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445324607] [2022-07-19 21:24:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:24:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:24:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:18,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-19 21:24:18,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 263 transitions, 888 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:18,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:18,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-19 21:24:18,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:22,779 INFO L129 PetriNetUnfolder]: 10589/37010 cut-off events. [2022-07-19 21:24:22,779 INFO L130 PetriNetUnfolder]: For 12303/12327 co-relation queries the response was YES. [2022-07-19 21:24:23,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63314 conditions, 37010 events. 10589/37010 cut-off events. For 12303/12327 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 481444 event pairs, 4993 based on Foata normal form. 7/34606 useless extension candidates. Maximal degree in co-relation 63285. Up to 7885 conditions per place. [2022-07-19 21:24:23,174 INFO L132 encePairwiseOnDemand]: 229/258 looper letters, 189 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2022-07-19 21:24:23,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 425 transitions, 1769 flow [2022-07-19 21:24:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:24:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:24:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3982 transitions. [2022-07-19 21:24:23,288 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7349575489110373 [2022-07-19 21:24:23,288 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3982 transitions. [2022-07-19 21:24:23,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3982 transitions. [2022-07-19 21:24:23,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:23,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3982 transitions. [2022-07-19 21:24:23,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 189.61904761904762) internal successors, (3982), 21 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:23,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:23,315 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:23,316 INFO L186 Difference]: Start difference. First operand has 301 places, 263 transitions, 888 flow. Second operand 21 states and 3982 transitions. [2022-07-19 21:24:23,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 425 transitions, 1769 flow [2022-07-19 21:24:23,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 425 transitions, 1684 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-19 21:24:23,361 INFO L242 Difference]: Finished difference. Result has 313 places, 286 transitions, 1032 flow [2022-07-19 21:24:23,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1032, PETRI_PLACES=313, PETRI_TRANSITIONS=286} [2022-07-19 21:24:23,363 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 80 predicate places. [2022-07-19 21:24:23,363 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 286 transitions, 1032 flow [2022-07-19 21:24:23,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:23,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:23,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:23,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:24:23,364 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 963524540, now seen corresponding path program 2 times [2022-07-19 21:24:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:23,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13342704] [2022-07-19 21:24:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13342704] [2022-07-19 21:24:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13342704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:23,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:23,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:24:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626511669] [2022-07-19 21:24:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:23,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:24:23,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:24:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:23,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-19 21:24:23,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 286 transitions, 1032 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:23,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:23,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-19 21:24:23,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:33,084 INFO L129 PetriNetUnfolder]: 21696/73389 cut-off events. [2022-07-19 21:24:33,084 INFO L130 PetriNetUnfolder]: For 33451/33502 co-relation queries the response was YES. [2022-07-19 21:24:33,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140592 conditions, 73389 events. 21696/73389 cut-off events. For 33451/33502 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 1038089 event pairs, 10573 based on Foata normal form. 82/70657 useless extension candidates. Maximal degree in co-relation 140557. Up to 15943 conditions per place. [2022-07-19 21:24:34,148 INFO L132 encePairwiseOnDemand]: 228/258 looper letters, 221 selfloop transitions, 62 changer transitions 0/480 dead transitions. [2022-07-19 21:24:34,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 480 transitions, 2314 flow [2022-07-19 21:24:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:24:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:24:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4897 transitions. [2022-07-19 21:24:34,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7300238521168754 [2022-07-19 21:24:34,170 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4897 transitions. [2022-07-19 21:24:34,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4897 transitions. [2022-07-19 21:24:34,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:34,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4897 transitions. [2022-07-19 21:24:34,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 188.34615384615384) internal successors, (4897), 26 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:34,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:34,179 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:34,179 INFO L186 Difference]: Start difference. First operand has 313 places, 286 transitions, 1032 flow. Second operand 26 states and 4897 transitions. [2022-07-19 21:24:34,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 480 transitions, 2314 flow [2022-07-19 21:24:34,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 480 transitions, 2287 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:24:34,373 INFO L242 Difference]: Finished difference. Result has 342 places, 330 transitions, 1471 flow [2022-07-19 21:24:34,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1471, PETRI_PLACES=342, PETRI_TRANSITIONS=330} [2022-07-19 21:24:34,374 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 109 predicate places. [2022-07-19 21:24:34,374 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 330 transitions, 1471 flow [2022-07-19 21:24:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:34,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:34,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:24:34,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash 281417016, now seen corresponding path program 3 times [2022-07-19 21:24:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84376944] [2022-07-19 21:24:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84376944] [2022-07-19 21:24:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84376944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993860899] [2022-07-19 21:24:34,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:24:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:34,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:24:34,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:24:34,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:24:34,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:24:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 21:24:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:35,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 21:24:35,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:24:35,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:24:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:24:35,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:35,833 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset)))))))) is different from false [2022-07-19 21:24:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:35,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993860899] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:35,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:35,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 24] total 50 [2022-07-19 21:24:35,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987497529] [2022-07-19 21:24:35,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:35,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:24:35,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:24:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2119, Unknown=1, NotChecked=94, Total=2450 [2022-07-19 21:24:35,869 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 258 [2022-07-19 21:24:35,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 330 transitions, 1471 flow. Second operand has 10 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:35,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:35,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 258 [2022-07-19 21:24:35,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:36,058 WARN L833 $PredicateComparison]: unable to prove that (and (or (= |c_thread1Thread1of1ForFork1_#t~mem2#1| |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= |c_thread2Thread1of1ForFork0_#t~mem8#1| |c_thread2Thread1of1ForFork0_#t~mem7#1|))) (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset))))))))) is different from false [2022-07-19 21:24:47,561 INFO L129 PetriNetUnfolder]: 25138/86367 cut-off events. [2022-07-19 21:24:47,561 INFO L130 PetriNetUnfolder]: For 89339/89418 co-relation queries the response was YES. [2022-07-19 21:24:48,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185089 conditions, 86367 events. 25138/86367 cut-off events. For 89339/89418 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 1258203 event pairs, 16062 based on Foata normal form. 134/83090 useless extension candidates. Maximal degree in co-relation 185042. Up to 33912 conditions per place. [2022-07-19 21:24:48,861 INFO L132 encePairwiseOnDemand]: 230/258 looper letters, 210 selfloop transitions, 113 changer transitions 0/536 dead transitions. [2022-07-19 21:24:48,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 536 transitions, 3312 flow [2022-07-19 21:24:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:24:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:24:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3075 transitions. [2022-07-19 21:24:48,864 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945736434108527 [2022-07-19 21:24:48,864 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3075 transitions. [2022-07-19 21:24:48,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3075 transitions. [2022-07-19 21:24:48,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:48,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3075 transitions. [2022-07-19 21:24:48,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 205.0) internal successors, (3075), 15 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:48,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:48,870 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:48,870 INFO L186 Difference]: Start difference. First operand has 342 places, 330 transitions, 1471 flow. Second operand 15 states and 3075 transitions. [2022-07-19 21:24:48,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 536 transitions, 3312 flow [2022-07-19 21:24:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 536 transitions, 3209 flow, removed 38 selfloop flow, removed 8 redundant places. [2022-07-19 21:24:49,651 INFO L242 Difference]: Finished difference. Result has 361 places, 430 transitions, 2602 flow [2022-07-19 21:24:49,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2602, PETRI_PLACES=361, PETRI_TRANSITIONS=430} [2022-07-19 21:24:49,652 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 128 predicate places. [2022-07-19 21:24:49,652 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 430 transitions, 2602 flow [2022-07-19 21:24:49,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:49,653 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:49,653 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:49,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:49,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:24:49,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:24:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1369574976, now seen corresponding path program 1 times [2022-07-19 21:24:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:49,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213577181] [2022-07-19 21:24:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213577181] [2022-07-19 21:24:50,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213577181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155397160] [2022-07-19 21:24:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:50,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:50,183 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:24:50,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:24:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 21:24:50,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:50,427 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 21:24:50,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-19 21:24:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:50,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:50,576 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-19 21:24:50,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-19 21:24:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155397160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:24:50,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:24:50,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-07-19 21:24:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309420662] [2022-07-19 21:24:50,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:24:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:24:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:24:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-07-19 21:24:50,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-19 21:24:50,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 430 transitions, 2602 flow. Second operand has 31 states, 31 states have (on average 182.38709677419354) internal successors, (5654), 31 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:24:50,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:50,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-19 21:24:50,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand