./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-trans.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-trans.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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:23:56,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:23:56,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:23:56,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:23:56,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:23:56,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:23:56,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:23:56,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:23:56,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:23:56,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:23:56,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:23:56,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:23:56,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:23:56,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:23:56,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:23:56,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:23:56,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:23:56,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:23:56,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:23:56,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:23:56,898 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:23:56,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:23:56,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:23:56,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:23:56,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:23:56,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:23:56,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:23:56,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:23:56,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:23:56,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:23:56,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:23:56,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:23:56,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:23:56,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:23:56,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:23:56,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:23:56,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:23:56,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:23:56,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:23:56,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:23:56,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:23:56,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:23:56,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:23:56,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:23:56,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:23:56,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:23:56,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:23:56,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:23:56,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:23:56,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:23:56,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:23:56,933 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:23:56,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:23:56,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:23:56,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:23:56,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:23:56,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:23:56,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:23:56,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:23:56,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:56,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:23:56,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:23:56,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:23:56,937 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:23:56,937 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:23:56,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:23:56,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-07-19 21:23:57,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:23:57,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:23:57,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:23:57,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:23:57,154 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:23:57,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-07-19 21:23:57,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383a4d9e9/38de92174375426b90b6073a15b07050/FLAG820505bf5 [2022-07-19 21:23:57,535 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:23:57,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-07-19 21:23:57,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383a4d9e9/38de92174375426b90b6073a15b07050/FLAG820505bf5 [2022-07-19 21:23:57,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383a4d9e9/38de92174375426b90b6073a15b07050 [2022-07-19 21:23:57,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:23:57,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:23:57,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:57,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:23:57,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:23:57,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585e975a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:57, skipping insertion in model container [2022-07-19 21:23:57,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:57" (1/1) ... [2022-07-19 21:23:57,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:23:57,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:23:58,161 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-trans.wvr.c[2728,2741] [2022-07-19 21:23:58,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:58,180 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:23:58,216 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-trans.wvr.c[2728,2741] [2022-07-19 21:23:58,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:58,245 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:23:58,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58 WrapperNode [2022-07-19 21:23:58,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:58,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:58,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:23:58,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:23:58,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,293 INFO L137 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 277 [2022-07-19 21:23:58,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:58,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:23:58,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:23:58,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:23:58,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:23:58,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:23:58,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:23:58,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:23:58,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (1/1) ... [2022-07-19 21:23:58,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:58,350 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 21:23:58,356 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 21:23:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:23:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:23:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:23:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:23:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:23:58,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:23:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:23:58,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:23:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:23:58,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:23:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:23:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:23:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:23:58,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:23:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:23:58,378 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 21:23:58,442 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:23:58,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:23:58,898 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:23:58,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:23:58,910 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:23:58,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:58 BoogieIcfgContainer [2022-07-19 21:23:58,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:23:58,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:23:58,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:23:58,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:23:58,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:23:57" (1/3) ... [2022-07-19 21:23:58,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a23014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:58, skipping insertion in model container [2022-07-19 21:23:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:58" (2/3) ... [2022-07-19 21:23:58,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a23014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:58, skipping insertion in model container [2022-07-19 21:23:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:58" (3/3) ... [2022-07-19 21:23:58,919 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-07-19 21:23:58,924 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:23:58,930 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:23:58,930 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:23:58,930 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:23:59,048 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:23:59,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 724 flow [2022-07-19 21:23:59,214 INFO L129 PetriNetUnfolder]: 28/347 cut-off events. [2022-07-19 21:23:59,215 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:23:59,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 28/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-07-19 21:23:59,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 350 transitions, 724 flow [2022-07-19 21:23:59,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 336 transitions, 690 flow [2022-07-19 21:23:59,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:23:59,245 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@69a7415e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31bdbc3b [2022-07-19 21:23:59,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:23:59,337 INFO L129 PetriNetUnfolder]: 27/331 cut-off events. [2022-07-19 21:23:59,338 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:23:59,338 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:59,339 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] [2022-07-19 21:23:59,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:23:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash -36079225, now seen corresponding path program 1 times [2022-07-19 21:23:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553319611] [2022-07-19 21:23:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:59,544 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 21:23:59,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:59,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553319611] [2022-07-19 21:23:59,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553319611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:59,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:59,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:23:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401141773] [2022-07-19 21:23:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:23:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:23:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:23:59,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 350 [2022-07-19 21:23:59,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 336 transitions, 690 flow. Second operand has 2 states, 2 states have (on average 328.0) internal successors, (656), 2 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 21:23:59,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:59,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 350 [2022-07-19 21:23:59,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:59,627 INFO L129 PetriNetUnfolder]: 9/317 cut-off events. [2022-07-19 21:23:59,627 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:23:59,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 317 events. 9/317 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 561 event pairs, 0 based on Foata normal form. 25/320 useless extension candidates. Maximal degree in co-relation 256. Up to 7 conditions per place. [2022-07-19 21:23:59,630 INFO L132 encePairwiseOnDemand]: 331/350 looper letters, 6 selfloop transitions, 0 changer transitions 7/317 dead transitions. [2022-07-19 21:23:59,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 317 transitions, 664 flow [2022-07-19 21:23:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:23:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:23:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 673 transitions. [2022-07-19 21:23:59,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9614285714285714 [2022-07-19 21:23:59,641 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 673 transitions. [2022-07-19 21:23:59,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 673 transitions. [2022-07-19 21:23:59,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:59,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 673 transitions. [2022-07-19 21:23:59,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 336.5) internal successors, (673), 2 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 21:23:59,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 21:23:59,652 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 21:23:59,653 INFO L186 Difference]: Start difference. First operand has 318 places, 336 transitions, 690 flow. Second operand 2 states and 673 transitions. [2022-07-19 21:23:59,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 317 transitions, 664 flow [2022-07-19 21:23:59,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 317 transitions, 652 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:23:59,660 INFO L242 Difference]: Finished difference. Result has 313 places, 310 transitions, 626 flow [2022-07-19 21:23:59,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=626, PETRI_PLACES=313, PETRI_TRANSITIONS=310} [2022-07-19 21:23:59,664 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-07-19 21:23:59,664 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 310 transitions, 626 flow [2022-07-19 21:23:59,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.0) internal successors, (656), 2 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 21:23:59,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:59,665 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] [2022-07-19 21:23:59,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:23:59,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:23:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash -330795675, now seen corresponding path program 1 times [2022-07-19 21:23:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:59,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89478775] [2022-07-19 21:23:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:00,176 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 21:24:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89478775] [2022-07-19 21:24:00,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89478775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:00,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:00,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:24:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830471880] [2022-07-19 21:24:00,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:00,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:24:00,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:24:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:00,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 350 [2022-07-19 21:24:00,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 310 transitions, 626 flow. Second operand has 20 states, 20 states have (on average 243.3) internal successors, (4866), 20 states have internal predecessors, (4866), 0 states have call successors, (0), 0 states 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 21:24:00,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:00,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 350 [2022-07-19 21:24:00,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:01,511 INFO L129 PetriNetUnfolder]: 687/5537 cut-off events. [2022-07-19 21:24:01,511 INFO L130 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-07-19 21:24:01,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 5537 events. 687/5537 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 56816 event pairs, 287 based on Foata normal form. 1/4936 useless extension candidates. Maximal degree in co-relation 6568. Up to 391 conditions per place. [2022-07-19 21:24:01,548 INFO L132 encePairwiseOnDemand]: 324/350 looper letters, 127 selfloop transitions, 26 changer transitions 4/384 dead transitions. [2022-07-19 21:24:01,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 384 transitions, 1101 flow [2022-07-19 21:24:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:24:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:24:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5918 transitions. [2022-07-19 21:24:01,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7045238095238096 [2022-07-19 21:24:01,557 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5918 transitions. [2022-07-19 21:24:01,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5918 transitions. [2022-07-19 21:24:01,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:01,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5918 transitions. [2022-07-19 21:24:01,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 246.58333333333334) internal successors, (5918), 24 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states 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 21:24:01,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 350.0) internal successors, (8750), 25 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states 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 21:24:01,583 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 350.0) internal successors, (8750), 25 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states 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 21:24:01,583 INFO L186 Difference]: Start difference. First operand has 313 places, 310 transitions, 626 flow. Second operand 24 states and 5918 transitions. [2022-07-19 21:24:01,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 384 transitions, 1101 flow [2022-07-19 21:24:01,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 384 transitions, 1101 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:24:01,591 INFO L242 Difference]: Finished difference. Result has 336 places, 320 transitions, 734 flow [2022-07-19 21:24:01,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=734, PETRI_PLACES=336, PETRI_TRANSITIONS=320} [2022-07-19 21:24:01,592 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 18 predicate places. [2022-07-19 21:24:01,592 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 320 transitions, 734 flow [2022-07-19 21:24:01,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 243.3) internal successors, (4866), 20 states have internal predecessors, (4866), 0 states have call successors, (0), 0 states 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 21:24:01,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:01,595 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] [2022-07-19 21:24:01,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:24:01,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1144664097, now seen corresponding path program 2 times [2022-07-19 21:24:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:01,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220227970] [2022-07-19 21:24:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:01,869 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 21:24:01,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:01,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220227970] [2022-07-19 21:24:01,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220227970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:01,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:01,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:24:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998246722] [2022-07-19 21:24:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:24:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:24:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:24:01,876 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-07-19 21:24:01,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 320 transitions, 734 flow. Second operand has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states 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 21:24:01,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:01,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-07-19 21:24:01,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:03,662 INFO L129 PetriNetUnfolder]: 1283/11290 cut-off events. [2022-07-19 21:24:03,662 INFO L130 PetriNetUnfolder]: For 729/751 co-relation queries the response was YES. [2022-07-19 21:24:03,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13869 conditions, 11290 events. 1283/11290 cut-off events. For 729/751 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 137834 event pairs, 693 based on Foata normal form. 3/10078 useless extension candidates. Maximal degree in co-relation 13858. Up to 657 conditions per place. [2022-07-19 21:24:03,732 INFO L132 encePairwiseOnDemand]: 328/350 looper letters, 151 selfloop transitions, 23 changer transitions 6/414 dead transitions. [2022-07-19 21:24:03,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 414 transitions, 1375 flow [2022-07-19 21:24:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:24:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:24:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5043 transitions. [2022-07-19 21:24:03,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7204285714285714 [2022-07-19 21:24:03,740 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5043 transitions. [2022-07-19 21:24:03,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5043 transitions. [2022-07-19 21:24:03,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:03,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5043 transitions. [2022-07-19 21:24:03,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 252.15) internal successors, (5043), 20 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states 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 21:24:03,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 350.0) internal successors, (7350), 21 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states 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 21:24:03,756 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 350.0) internal successors, (7350), 21 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states 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 21:24:03,756 INFO L186 Difference]: Start difference. First operand has 336 places, 320 transitions, 734 flow. Second operand 20 states and 5043 transitions. [2022-07-19 21:24:03,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 414 transitions, 1375 flow [2022-07-19 21:24:03,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 414 transitions, 1337 flow, removed 5 selfloop flow, removed 13 redundant places. [2022-07-19 21:24:03,764 INFO L242 Difference]: Finished difference. Result has 351 places, 334 transitions, 850 flow [2022-07-19 21:24:03,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=850, PETRI_PLACES=351, PETRI_TRANSITIONS=334} [2022-07-19 21:24:03,765 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 33 predicate places. [2022-07-19 21:24:03,766 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 334 transitions, 850 flow [2022-07-19 21:24:03,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states 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 21:24:03,767 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:03,767 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] [2022-07-19 21:24:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:24:03,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1845871625, now seen corresponding path program 1 times [2022-07-19 21:24:03,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281998363] [2022-07-19 21:24:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:03,902 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 21:24:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281998363] [2022-07-19 21:24:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281998363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:03,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 21:24:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657801691] [2022-07-19 21:24:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:03,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:24:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:24:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:24:03,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-07-19 21:24:03,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 334 transitions, 850 flow. Second operand has 14 states, 14 states have (on average 248.78571428571428) internal successors, (3483), 14 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states 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 21:24:03,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:03,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-07-19 21:24:03,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:05,615 INFO L129 PetriNetUnfolder]: 1283/10402 cut-off events. [2022-07-19 21:24:05,615 INFO L130 PetriNetUnfolder]: For 1140/1264 co-relation queries the response was YES. [2022-07-19 21:24:05,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13282 conditions, 10402 events. 1283/10402 cut-off events. For 1140/1264 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 124615 event pairs, 456 based on Foata normal form. 2/9238 useless extension candidates. Maximal degree in co-relation 13262. Up to 783 conditions per place. [2022-07-19 21:24:05,677 INFO L132 encePairwiseOnDemand]: 330/350 looper letters, 130 selfloop transitions, 26 changer transitions 5/394 dead transitions. [2022-07-19 21:24:05,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 394 transitions, 1339 flow [2022-07-19 21:24:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:24:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:24:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4780 transitions. [2022-07-19 21:24:05,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718796992481203 [2022-07-19 21:24:05,684 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4780 transitions. [2022-07-19 21:24:05,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4780 transitions. [2022-07-19 21:24:05,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:05,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4780 transitions. [2022-07-19 21:24:05,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 251.57894736842104) internal successors, (4780), 19 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states 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 21:24:05,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:05,699 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:05,699 INFO L186 Difference]: Start difference. First operand has 351 places, 334 transitions, 850 flow. Second operand 19 states and 4780 transitions. [2022-07-19 21:24:05,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 394 transitions, 1339 flow [2022-07-19 21:24:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 394 transitions, 1320 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-07-19 21:24:05,706 INFO L242 Difference]: Finished difference. Result has 368 places, 337 transitions, 919 flow [2022-07-19 21:24:05,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=919, PETRI_PLACES=368, PETRI_TRANSITIONS=337} [2022-07-19 21:24:05,707 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 50 predicate places. [2022-07-19 21:24:05,708 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 337 transitions, 919 flow [2022-07-19 21:24:05,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.78571428571428) internal successors, (3483), 14 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states 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 21:24:05,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:05,709 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] [2022-07-19 21:24:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:24:05,709 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1906080933, now seen corresponding path program 1 times [2022-07-19 21:24:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:05,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827107857] [2022-07-19 21:24:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:05,841 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 21:24:05,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:05,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827107857] [2022-07-19 21:24:05,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827107857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947328755] [2022-07-19 21:24:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:05,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:05,871 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 21:24:05,872 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 21:24:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:24:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:06,388 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 21:24:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:06,769 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 21:24:06,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947328755] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:06,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:06,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-19 21:24:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352673085] [2022-07-19 21:24:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:06,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:24:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:24:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:24:06,773 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-07-19 21:24:06,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 337 transitions, 919 flow. Second operand has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 21:24:06,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:06,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-07-19 21:24:06,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:09,768 INFO L129 PetriNetUnfolder]: 2616/21161 cut-off events. [2022-07-19 21:24:09,768 INFO L130 PetriNetUnfolder]: For 1937/1939 co-relation queries the response was YES. [2022-07-19 21:24:09,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26682 conditions, 21161 events. 2616/21161 cut-off events. For 1937/1939 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 292098 event pairs, 1445 based on Foata normal form. 0/18965 useless extension candidates. Maximal degree in co-relation 26658. Up to 900 conditions per place. [2022-07-19 21:24:09,920 INFO L132 encePairwiseOnDemand]: 332/350 looper letters, 163 selfloop transitions, 28 changer transitions 3/450 dead transitions. [2022-07-19 21:24:09,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 450 transitions, 1642 flow [2022-07-19 21:24:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:24:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:24:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5273 transitions. [2022-07-19 21:24:09,929 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929323308270677 [2022-07-19 21:24:09,929 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5273 transitions. [2022-07-19 21:24:09,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5273 transitions. [2022-07-19 21:24:09,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:09,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5273 transitions. [2022-07-19 21:24:09,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 277.5263157894737) internal successors, (5273), 19 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states 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 21:24:09,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:09,945 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:09,945 INFO L186 Difference]: Start difference. First operand has 368 places, 337 transitions, 919 flow. Second operand 19 states and 5273 transitions. [2022-07-19 21:24:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 450 transitions, 1642 flow [2022-07-19 21:24:09,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 450 transitions, 1576 flow, removed 6 selfloop flow, removed 14 redundant places. [2022-07-19 21:24:09,956 INFO L242 Difference]: Finished difference. Result has 376 places, 350 transitions, 1003 flow [2022-07-19 21:24:09,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1003, PETRI_PLACES=376, PETRI_TRANSITIONS=350} [2022-07-19 21:24:09,957 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 58 predicate places. [2022-07-19 21:24:09,957 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 350 transitions, 1003 flow [2022-07-19 21:24:09,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 21:24:09,958 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:09,958 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, 1, 1, 1] [2022-07-19 21:24:09,995 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 21:24:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:10,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1964388484, now seen corresponding path program 1 times [2022-07-19 21:24:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:10,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144707618] [2022-07-19 21:24:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:10,389 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 21:24:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144707618] [2022-07-19 21:24:10,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144707618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:10,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49550473] [2022-07-19 21:24:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:10,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:10,404 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 21:24:10,476 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 21:24:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:24:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:11,117 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 21:24:11,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:11,417 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 21:24:11,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49550473] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:11,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:11,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16, 13] total 32 [2022-07-19 21:24:11,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541217312] [2022-07-19 21:24:11,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:11,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:24:11,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:24:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-07-19 21:24:11,424 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-07-19 21:24:11,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 350 transitions, 1003 flow. Second operand has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states 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 21:24:11,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:11,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-07-19 21:24:11,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:13,828 INFO L129 PetriNetUnfolder]: 2115/18383 cut-off events. [2022-07-19 21:24:13,829 INFO L130 PetriNetUnfolder]: For 2343/2347 co-relation queries the response was YES. [2022-07-19 21:24:13,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23422 conditions, 18383 events. 2115/18383 cut-off events. For 2343/2347 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 239479 event pairs, 1162 based on Foata normal form. 8/16494 useless extension candidates. Maximal degree in co-relation 23396. Up to 948 conditions per place. [2022-07-19 21:24:14,002 INFO L132 encePairwiseOnDemand]: 328/350 looper letters, 167 selfloop transitions, 36 changer transitions 4/444 dead transitions. [2022-07-19 21:24:14,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 444 transitions, 1735 flow [2022-07-19 21:24:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:24:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:24:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4320 transitions. [2022-07-19 21:24:14,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7260504201680672 [2022-07-19 21:24:14,010 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4320 transitions. [2022-07-19 21:24:14,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4320 transitions. [2022-07-19 21:24:14,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:14,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4320 transitions. [2022-07-19 21:24:14,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 254.11764705882354) internal successors, (4320), 17 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states 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 21:24:14,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states 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 21:24:14,025 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states 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 21:24:14,025 INFO L186 Difference]: Start difference. First operand has 376 places, 350 transitions, 1003 flow. Second operand 17 states and 4320 transitions. [2022-07-19 21:24:14,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 444 transitions, 1735 flow [2022-07-19 21:24:14,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 444 transitions, 1713 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-19 21:24:14,035 INFO L242 Difference]: Finished difference. Result has 392 places, 365 transitions, 1163 flow [2022-07-19 21:24:14,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1163, PETRI_PLACES=392, PETRI_TRANSITIONS=365} [2022-07-19 21:24:14,038 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 74 predicate places. [2022-07-19 21:24:14,038 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 365 transitions, 1163 flow [2022-07-19 21:24:14,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states 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 21:24:14,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:14,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:14,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:24:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 21:24:14,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2020113811, now seen corresponding path program 1 times [2022-07-19 21:24:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711044022] [2022-07-19 21:24:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:14,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:14,461 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 21:24:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711044022] [2022-07-19 21:24:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711044022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483010391] [2022-07-19 21:24:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:14,480 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 21:24:14,481 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 21:24:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:24:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:14,975 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 21:24:14,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:24:15,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483010391] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:15,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:15,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 29 [2022-07-19 21:24:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785157440] [2022-07-19 21:24:15,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:24:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:24:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-07-19 21:24:15,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-07-19 21:24:15,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 365 transitions, 1163 flow. Second operand has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 21:24:15,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:15,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-07-19 21:24:15,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:18,660 INFO L129 PetriNetUnfolder]: 4241/22791 cut-off events. [2022-07-19 21:24:18,660 INFO L130 PetriNetUnfolder]: For 4767/4825 co-relation queries the response was YES. [2022-07-19 21:24:18,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32948 conditions, 22791 events. 4241/22791 cut-off events. For 4767/4825 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 293119 event pairs, 1428 based on Foata normal form. 46/20288 useless extension candidates. Maximal degree in co-relation 32915. Up to 1606 conditions per place. [2022-07-19 21:24:18,852 INFO L132 encePairwiseOnDemand]: 332/350 looper letters, 163 selfloop transitions, 31 changer transitions 1/456 dead transitions. [2022-07-19 21:24:18,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 456 transitions, 1836 flow [2022-07-19 21:24:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:24:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:24:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4987 transitions. [2022-07-19 21:24:18,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7915873015873016 [2022-07-19 21:24:18,865 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4987 transitions. [2022-07-19 21:24:18,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4987 transitions. [2022-07-19 21:24:18,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:18,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4987 transitions. [2022-07-19 21:24:18,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 277.05555555555554) internal successors, (4987), 18 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states 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 21:24:18,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states 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 21:24:18,883 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states 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 21:24:18,884 INFO L186 Difference]: Start difference. First operand has 392 places, 365 transitions, 1163 flow. Second operand 18 states and 4987 transitions. [2022-07-19 21:24:18,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 456 transitions, 1836 flow [2022-07-19 21:24:18,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 456 transitions, 1799 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-07-19 21:24:18,902 INFO L242 Difference]: Finished difference. Result has 399 places, 371 transitions, 1213 flow [2022-07-19 21:24:18,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1213, PETRI_PLACES=399, PETRI_TRANSITIONS=371} [2022-07-19 21:24:18,903 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 81 predicate places. [2022-07-19 21:24:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 371 transitions, 1213 flow [2022-07-19 21:24:18,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 21:24:18,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:18,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:18,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:24:19,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:19,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 15889408, now seen corresponding path program 1 times [2022-07-19 21:24:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:19,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88150241] [2022-07-19 21:24:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:24:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88150241] [2022-07-19 21:24:19,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88150241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:19,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904922914] [2022-07-19 21:24:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:19,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:19,264 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 21:24:19,320 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 21:24:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:24:19,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:24:19,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:24:20,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904922914] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:20,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:24:20,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-07-19 21:24:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638993465] [2022-07-19 21:24:20,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:20,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:24:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:24:20,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:24:20,287 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-07-19 21:24:20,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 371 transitions, 1213 flow. Second operand has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 21:24:20,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:20,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-07-19 21:24:20,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:25,380 INFO L129 PetriNetUnfolder]: 4966/37610 cut-off events. [2022-07-19 21:24:25,380 INFO L130 PetriNetUnfolder]: For 8388/8777 co-relation queries the response was YES. [2022-07-19 21:24:25,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52909 conditions, 37610 events. 4966/37610 cut-off events. For 8388/8777 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 560715 event pairs, 2134 based on Foata normal form. 65/34593 useless extension candidates. Maximal degree in co-relation 52878. Up to 2270 conditions per place. [2022-07-19 21:24:25,831 INFO L132 encePairwiseOnDemand]: 333/350 looper letters, 180 selfloop transitions, 40 changer transitions 2/486 dead transitions. [2022-07-19 21:24:25,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 486 transitions, 2107 flow [2022-07-19 21:24:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 21:24:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 21:24:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5246 transitions. [2022-07-19 21:24:25,836 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7888721804511278 [2022-07-19 21:24:25,836 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5246 transitions. [2022-07-19 21:24:25,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5246 transitions. [2022-07-19 21:24:25,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:25,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5246 transitions. [2022-07-19 21:24:25,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 276.10526315789474) internal successors, (5246), 19 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states 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 21:24:25,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:25,851 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 21:24:25,851 INFO L186 Difference]: Start difference. First operand has 399 places, 371 transitions, 1213 flow. Second operand 19 states and 5246 transitions. [2022-07-19 21:24:25,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 486 transitions, 2107 flow [2022-07-19 21:24:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 486 transitions, 2064 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-07-19 21:24:25,873 INFO L242 Difference]: Finished difference. Result has 414 places, 383 transitions, 1347 flow [2022-07-19 21:24:25,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1347, PETRI_PLACES=414, PETRI_TRANSITIONS=383} [2022-07-19 21:24:25,876 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 96 predicate places. [2022-07-19 21:24:25,876 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 383 transitions, 1347 flow [2022-07-19 21:24:25,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 21:24:25,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:25,877 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:24:25,909 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 21:24:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:26,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash 883261830, now seen corresponding path program 1 times [2022-07-19 21:24:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645625960] [2022-07-19 21:24:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:26,147 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 21:24:26,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:26,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645625960] [2022-07-19 21:24:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645625960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:26,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:24:26,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:24:26,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730693560] [2022-07-19 21:24:26,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:24:26,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-07-19 21:24:26,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 383 transitions, 1347 flow. Second operand has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 21:24:26,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:26,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-07-19 21:24:26,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:27,479 INFO L129 PetriNetUnfolder]: 743/9168 cut-off events. [2022-07-19 21:24:27,479 INFO L130 PetriNetUnfolder]: For 2522/3267 co-relation queries the response was YES. [2022-07-19 21:24:27,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12941 conditions, 9168 events. 743/9168 cut-off events. For 2522/3267 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 105510 event pairs, 432 based on Foata normal form. 33/8545 useless extension candidates. Maximal degree in co-relation 12906. Up to 1109 conditions per place. [2022-07-19 21:24:27,593 INFO L132 encePairwiseOnDemand]: 339/350 looper letters, 75 selfloop transitions, 8 changer transitions 57/409 dead transitions. [2022-07-19 21:24:27,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 409 transitions, 1710 flow [2022-07-19 21:24:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:24:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:24:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2834 transitions. [2022-07-19 21:24:27,597 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8097142857142857 [2022-07-19 21:24:27,597 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2834 transitions. [2022-07-19 21:24:27,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2834 transitions. [2022-07-19 21:24:27,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:27,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2834 transitions. [2022-07-19 21:24:27,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 283.4) internal successors, (2834), 10 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states 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 21:24:27,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 21:24:27,605 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 21:24:27,605 INFO L186 Difference]: Start difference. First operand has 414 places, 383 transitions, 1347 flow. Second operand 10 states and 2834 transitions. [2022-07-19 21:24:27,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 409 transitions, 1710 flow [2022-07-19 21:24:27,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 409 transitions, 1650 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-07-19 21:24:27,618 INFO L242 Difference]: Finished difference. Result has 411 places, 350 transitions, 1104 flow [2022-07-19 21:24:27,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1104, PETRI_PLACES=411, PETRI_TRANSITIONS=350} [2022-07-19 21:24:27,620 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 93 predicate places. [2022-07-19 21:24:27,620 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 350 transitions, 1104 flow [2022-07-19 21:24:27,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 21:24:27,620 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:27,621 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, 1, 1, 1, 1, 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 21:24:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:24:27,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2016968799, now seen corresponding path program 1 times [2022-07-19 21:24:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146620453] [2022-07-19 21:24:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:24:27,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146620453] [2022-07-19 21:24:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146620453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606919524] [2022-07-19 21:24:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:27,790 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 21:24:27,842 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 21:24:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:24:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:24:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:24:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:24:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606919524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:24:28,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:24:28,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2022-07-19 21:24:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484479623] [2022-07-19 21:24:28,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:24:28,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:24:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:24:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-07-19 21:24:28,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 350 [2022-07-19 21:24:28,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 350 transitions, 1104 flow. Second operand has 31 states, 31 states have (on average 246.3548387096774) internal successors, (7637), 31 states have internal predecessors, (7637), 0 states have call successors, (0), 0 states 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 21:24:28,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:28,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 350 [2022-07-19 21:24:28,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:33,856 INFO L129 PetriNetUnfolder]: 2980/30212 cut-off events. [2022-07-19 21:24:33,856 INFO L130 PetriNetUnfolder]: For 7714/7839 co-relation queries the response was YES. [2022-07-19 21:24:34,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41914 conditions, 30212 events. 2980/30212 cut-off events. For 7714/7839 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 438851 event pairs, 1802 based on Foata normal form. 93/28069 useless extension candidates. Maximal degree in co-relation 41878. Up to 1818 conditions per place. [2022-07-19 21:24:34,322 INFO L132 encePairwiseOnDemand]: 317/350 looper letters, 281 selfloop transitions, 69 changer transitions 19/609 dead transitions. [2022-07-19 21:24:34,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 609 transitions, 2999 flow [2022-07-19 21:24:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:24:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:24:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 12846 transitions. [2022-07-19 21:24:34,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7058241758241758 [2022-07-19 21:24:34,333 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 12846 transitions. [2022-07-19 21:24:34,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 12846 transitions. [2022-07-19 21:24:34,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:34,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 12846 transitions. [2022-07-19 21:24:34,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 247.03846153846155) internal successors, (12846), 52 states have internal predecessors, (12846), 0 states have call successors, (0), 0 states 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 21:24:34,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 350.0) internal successors, (18550), 53 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states 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 21:24:34,360 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 350.0) internal successors, (18550), 53 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states 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 21:24:34,361 INFO L186 Difference]: Start difference. First operand has 411 places, 350 transitions, 1104 flow. Second operand 52 states and 12846 transitions. [2022-07-19 21:24:34,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 609 transitions, 2999 flow [2022-07-19 21:24:34,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 609 transitions, 2790 flow, removed 15 selfloop flow, removed 30 redundant places. [2022-07-19 21:24:34,379 INFO L242 Difference]: Finished difference. Result has 441 places, 398 transitions, 1500 flow [2022-07-19 21:24:34,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1500, PETRI_PLACES=441, PETRI_TRANSITIONS=398} [2022-07-19 21:24:34,380 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 123 predicate places. [2022-07-19 21:24:34,380 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1500 flow [2022-07-19 21:24:34,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 246.3548387096774) internal successors, (7637), 31 states have internal predecessors, (7637), 0 states have call successors, (0), 0 states 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 21:24:34,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:34,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:34,401 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 21:24:34,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:24:34,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 621379751, now seen corresponding path program 2 times [2022-07-19 21:24:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658389807] [2022-07-19 21:24:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:24:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658389807] [2022-07-19 21:24:34,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658389807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778758481] [2022-07-19 21:24:34,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:24:34,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:34,844 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 21:24:34,845 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 21:24:34,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:24:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:24:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:24:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 21:24:35,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:24:35,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778758481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:35,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:24:35,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 20 [2022-07-19 21:24:35,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286198748] [2022-07-19 21:24:35,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:35,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:35,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:35,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-07-19 21:24:35,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 398 transitions, 1500 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 21:24:35,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:35,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-07-19 21:24:35,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:24:42,161 INFO L129 PetriNetUnfolder]: 6378/46375 cut-off events. [2022-07-19 21:24:42,161 INFO L130 PetriNetUnfolder]: For 16564/17006 co-relation queries the response was YES. [2022-07-19 21:24:42,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70276 conditions, 46375 events. 6378/46375 cut-off events. For 16564/17006 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 703751 event pairs, 1508 based on Foata normal form. 243/42641 useless extension candidates. Maximal degree in co-relation 70229. Up to 3955 conditions per place. [2022-07-19 21:24:42,779 INFO L132 encePairwiseOnDemand]: 341/350 looper letters, 144 selfloop transitions, 32 changer transitions 4/490 dead transitions. [2022-07-19 21:24:42,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 490 transitions, 2352 flow [2022-07-19 21:24:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:24:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:24:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1963 transitions. [2022-07-19 21:24:42,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8012244897959183 [2022-07-19 21:24:42,782 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1963 transitions. [2022-07-19 21:24:42,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1963 transitions. [2022-07-19 21:24:42,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:24:42,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1963 transitions. [2022-07-19 21:24:42,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.42857142857144) internal successors, (1963), 7 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 21:24:42,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 21:24:42,786 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 21:24:42,786 INFO L186 Difference]: Start difference. First operand has 441 places, 398 transitions, 1500 flow. Second operand 7 states and 1963 transitions. [2022-07-19 21:24:42,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 490 transitions, 2352 flow [2022-07-19 21:24:42,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 490 transitions, 2279 flow, removed 33 selfloop flow, removed 10 redundant places. [2022-07-19 21:24:42,825 INFO L242 Difference]: Finished difference. Result has 436 places, 422 transitions, 1744 flow [2022-07-19 21:24:42,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=436, PETRI_TRANSITIONS=422} [2022-07-19 21:24:42,826 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, 118 predicate places. [2022-07-19 21:24:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 422 transitions, 1744 flow [2022-07-19 21:24:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 21:24:42,827 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:24:42,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:42,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 21:24:43,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:43,044 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:24:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:24:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1872062923, now seen corresponding path program 3 times [2022-07-19 21:24:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:24:43,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996060274] [2022-07-19 21:24:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:24:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:24:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:24:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:24:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:24:43,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996060274] [2022-07-19 21:24:43,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996060274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:24:43,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937588262] [2022-07-19 21:24:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:24:43,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:24:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:24:43,255 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 21:24:43,256 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 21:24:43,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-19 21:24:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:24:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:24:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:24:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 21:24:43,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:24:43,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937588262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:24:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:24:43,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 20 [2022-07-19 21:24:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074217491] [2022-07-19 21:24:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:24:43,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:24:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:24:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:24:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:24:43,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-07-19 21:24:43,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 422 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 21:24:43,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:24:43,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-07-19 21:24:43,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand