./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/goblint-regression/28-race_reach_01-simple_racing.i -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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:55:37,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:55:37,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:55:37,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:55:37,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:55:37,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:55:37,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:55:37,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:55:37,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:55:37,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:55:37,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:55:37,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:55:37,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:55:37,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:55:37,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:55:37,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:55:37,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:55:37,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:55:37,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:55:37,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:55:37,098 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:55:37,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:55:37,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:55:37,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:55:37,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:55:37,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:55:37,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:55:37,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:55:37,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:55:37,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:55:37,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:55:37,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:55:37,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:55:37,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:55:37,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:55:37,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:55:37,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:55:37,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:55:37,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:55:37,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:55:37,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:55:37,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:55:37,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:55:37,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:55:37,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:55:37,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:55:37,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:55:37,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:55:37,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:55:37,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:55:37,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:55:37,156 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:55:37,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:55:37,157 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:55:37,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:55:37,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:55:37,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:55:37,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:55:37,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:55:37,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:55:37,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:55:37,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:55:37,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:55:37,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:55:37,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:55:37,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:55:37,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:55:37,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:55:37,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:55:37,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:55:37,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:55:37,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:55:37,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:55:37,162 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:55:37,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:55:37,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:55:37,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2022-07-13 21:55:37,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:55:37,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:55:37,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:55:37,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:55:37,433 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:55:37,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-07-13 21:55:37,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74995dce7/2c82c0280b5a4f3086652cf8e4bc21c0/FLAGd99bff92d [2022-07-13 21:55:37,936 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:55:37,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2022-07-13 21:55:37,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74995dce7/2c82c0280b5a4f3086652cf8e4bc21c0/FLAGd99bff92d [2022-07-13 21:55:37,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74995dce7/2c82c0280b5a4f3086652cf8e4bc21c0 [2022-07-13 21:55:37,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:55:37,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:55:37,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:55:37,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:55:37,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:55:37,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:55:37" (1/1) ... [2022-07-13 21:55:37,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4585ab42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:37, skipping insertion in model container [2022-07-13 21:55:37,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:55:37" (1/1) ... [2022-07-13 21:55:37,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:55:38,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:55:38,255 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/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-07-13 21:55:38,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:55:38,301 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:55:38,354 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/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2022-07-13 21:55:38,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:55:38,395 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:55:38,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38 WrapperNode [2022-07-13 21:55:38,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:55:38,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:55:38,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:55:38,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:55:38,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,434 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-07-13 21:55:38,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:55:38,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:55:38,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:55:38,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:55:38,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:55:38,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:55:38,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:55:38,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:55:38,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (1/1) ... [2022-07-13 21:55:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:55:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:38,502 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) [2022-07-13 21:55:38,507 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 [2022-07-13 21:55:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:55:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:55:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:55:38,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:55:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:55:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:55:38,532 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:55:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:55:38,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:55:38,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:55:38,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:55:38,534 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:55:38,673 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:55:38,675 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:55:38,858 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:55:38,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:55:38,865 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-13 21:55:38,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:55:38 BoogieIcfgContainer [2022-07-13 21:55:38,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:55:38,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:55:38,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:55:38,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:55:38,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:55:37" (1/3) ... [2022-07-13 21:55:38,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336766fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:55:38, skipping insertion in model container [2022-07-13 21:55:38,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:55:38" (2/3) ... [2022-07-13 21:55:38,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336766fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:55:38, skipping insertion in model container [2022-07-13 21:55:38,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:55:38" (3/3) ... [2022-07-13 21:55:38,884 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2022-07-13 21:55:38,889 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:55:38,896 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:55:38,897 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:55:38,897 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:55:38,935 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:55:38,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 112 transitions, 232 flow [2022-07-13 21:55:39,023 INFO L129 PetriNetUnfolder]: 17/148 cut-off events. [2022-07-13 21:55:39,024 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:55:39,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 148 events. 17/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 328 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-07-13 21:55:39,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 112 transitions, 232 flow [2022-07-13 21:55:39,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 219 flow [2022-07-13 21:55:39,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:55:39,054 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:55:39,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:55:39,072 INFO L129 PetriNetUnfolder]: 4/83 cut-off events. [2022-07-13 21:55:39,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:39,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:39,074 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] [2022-07-13 21:55:39,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 553214227, now seen corresponding path program 1 times [2022-07-13 21:55:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723743053] [2022-07-13 21:55:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723743053] [2022-07-13 21:55:39,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723743053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:39,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:39,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:55:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811149332] [2022-07-13 21:55:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:55:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:55:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:55:39,389 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 112 [2022-07-13 21:55:39,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:39,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 112 [2022-07-13 21:55:39,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:39,435 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2022-07-13 21:55:39,435 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:39,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 99 events. 0/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 23/119 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 21:55:39,437 INFO L132 encePairwiseOnDemand]: 98/112 looper letters, 8 selfloop transitions, 2 changer transitions 15/97 dead transitions. [2022-07-13 21:55:39,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 219 flow [2022-07-13 21:55:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:55:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:55:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2022-07-13 21:55:39,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8988095238095238 [2022-07-13 21:55:39,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2022-07-13 21:55:39,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2022-07-13 21:55:39,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:39,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2022-07-13 21:55:39,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,479 INFO L186 Difference]: Start difference. First operand has 99 places, 107 transitions, 219 flow. Second operand 3 states and 302 transitions. [2022-07-13 21:55:39,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 219 flow [2022-07-13 21:55:39,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:39,487 INFO L242 Difference]: Finished difference. Result has 101 places, 80 transitions, 173 flow [2022-07-13 21:55:39,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=101, PETRI_TRANSITIONS=80} [2022-07-13 21:55:39,498 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2022-07-13 21:55:39,501 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 80 transitions, 173 flow [2022-07-13 21:55:39,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,502 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:39,502 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 21:55:39,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:55:39,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash 75330056, now seen corresponding path program 1 times [2022-07-13 21:55:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:39,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889905013] [2022-07-13 21:55:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:39,562 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:55:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:39,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:55:39,626 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:55:39,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:55:39,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:55:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:55:39,629 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:55:39,632 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:55:39,632 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:55:39,653 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:55:39,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 142 transitions, 302 flow [2022-07-13 21:55:39,693 INFO L129 PetriNetUnfolder]: 31/239 cut-off events. [2022-07-13 21:55:39,693 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:55:39,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 662 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-07-13 21:55:39,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 142 transitions, 302 flow [2022-07-13 21:55:39,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 142 transitions, 302 flow [2022-07-13 21:55:39,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:55:39,701 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:55:39,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:55:39,731 INFO L129 PetriNetUnfolder]: 5/86 cut-off events. [2022-07-13 21:55:39,731 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:39,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:39,732 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] [2022-07-13 21:55:39,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -791425376, now seen corresponding path program 1 times [2022-07-13 21:55:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787674630] [2022-07-13 21:55:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:39,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787674630] [2022-07-13 21:55:39,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787674630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:39,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:39,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:55:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592210926] [2022-07-13 21:55:39,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:39,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:55:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:55:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:55:39,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 142 [2022-07-13 21:55:39,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:39,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 142 [2022-07-13 21:55:39,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:39,841 INFO L129 PetriNetUnfolder]: 3/208 cut-off events. [2022-07-13 21:55:39,843 INFO L130 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-07-13 21:55:39,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 208 events. 3/208 cut-off events. For 20/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 515 event pairs, 0 based on Foata normal form. 42/240 useless extension candidates. Maximal degree in co-relation 134. Up to 7 conditions per place. [2022-07-13 21:55:39,845 INFO L132 encePairwiseOnDemand]: 125/142 looper letters, 2 selfloop transitions, 0 changer transitions 21/124 dead transitions. [2022-07-13 21:55:39,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 274 flow [2022-07-13 21:55:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:55:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:55:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 261 transitions. [2022-07-13 21:55:39,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9190140845070423 [2022-07-13 21:55:39,849 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 261 transitions. [2022-07-13 21:55:39,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 261 transitions. [2022-07-13 21:55:39,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:39,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 261 transitions. [2022-07-13 21:55:39,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,853 INFO L186 Difference]: Start difference. First operand has 128 places, 142 transitions, 302 flow. Second operand 2 states and 261 transitions. [2022-07-13 21:55:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 274 flow [2022-07-13 21:55:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 124 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:39,857 INFO L242 Difference]: Finished difference. Result has 128 places, 103 transitions, 218 flow [2022-07-13 21:55:39,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2022-07-13 21:55:39,858 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-07-13 21:55:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 218 flow [2022-07-13 21:55:39,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:39,859 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] [2022-07-13 21:55:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:55:39,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1706590561, now seen corresponding path program 1 times [2022-07-13 21:55:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464652334] [2022-07-13 21:55:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464652334] [2022-07-13 21:55:39,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464652334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:39,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:39,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:55:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298234528] [2022-07-13 21:55:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:39,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:55:39,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:55:39,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:55:39,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-07-13 21:55:39,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:39,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-07-13 21:55:39,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:39,938 INFO L129 PetriNetUnfolder]: 0/127 cut-off events. [2022-07-13 21:55:39,939 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:55:39,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 127 events. 0/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-13 21:55:39,939 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 11 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2022-07-13 21:55:39,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 107 transitions, 252 flow [2022-07-13 21:55:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:55:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:55:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-07-13 21:55:39,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8286384976525821 [2022-07-13 21:55:39,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-07-13 21:55:39,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-07-13 21:55:39,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:39,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-07-13 21:55:39,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,950 INFO L186 Difference]: Start difference. First operand has 128 places, 103 transitions, 218 flow. Second operand 3 states and 353 transitions. [2022-07-13 21:55:39,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 107 transitions, 252 flow [2022-07-13 21:55:39,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 107 transitions, 250 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:39,957 INFO L242 Difference]: Finished difference. Result has 112 places, 104 transitions, 228 flow [2022-07-13 21:55:39,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-07-13 21:55:39,960 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -16 predicate places. [2022-07-13 21:55:39,960 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 228 flow [2022-07-13 21:55:39,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:39,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:39,961 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] [2022-07-13 21:55:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:55:39,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash 304504167, now seen corresponding path program 1 times [2022-07-13 21:55:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:39,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726585141] [2022-07-13 21:55:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726585141] [2022-07-13 21:55:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726585141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:55:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065616784] [2022-07-13 21:55:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:40,043 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) [2022-07-13 21:55:40,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:55:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:40,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:55:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:55:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:40,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:55:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:40,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065616784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:55:40,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:55:40,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:55:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211752585] [2022-07-13 21:55:40,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:55:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:55:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:55:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:55:40,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2022-07-13 21:55:40,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 228 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:40,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2022-07-13 21:55:40,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:40,405 INFO L129 PetriNetUnfolder]: 0/105 cut-off events. [2022-07-13 21:55:40,406 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:55:40,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 105 events. 0/105 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/107 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-13 21:55:40,407 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 9 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2022-07-13 21:55:40,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 99 transitions, 248 flow [2022-07-13 21:55:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:55:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:55:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-07-13 21:55:40,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8028169014084507 [2022-07-13 21:55:40,411 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-07-13 21:55:40,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-07-13 21:55:40,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:40,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-07-13 21:55:40,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,420 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,420 INFO L186 Difference]: Start difference. First operand has 112 places, 104 transitions, 228 flow. Second operand 9 states and 1026 transitions. [2022-07-13 21:55:40,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 99 transitions, 248 flow [2022-07-13 21:55:40,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 99 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:55:40,423 INFO L242 Difference]: Finished difference. Result has 108 places, 95 transitions, 220 flow [2022-07-13 21:55:40,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=95} [2022-07-13 21:55:40,426 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -20 predicate places. [2022-07-13 21:55:40,426 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 95 transitions, 220 flow [2022-07-13 21:55:40,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,427 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:40,427 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-13 21:55:40,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:55:40,650 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 [2022-07-13 21:55:40,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1100421077, now seen corresponding path program 1 times [2022-07-13 21:55:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:40,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902767684] [2022-07-13 21:55:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:40,682 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:55:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:40,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:55:40,711 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:55:40,711 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:55:40,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:55:40,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:55:40,712 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:55:40,713 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:55:40,713 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:55:40,749 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:55:40,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 153 places, 172 transitions, 374 flow [2022-07-13 21:55:40,800 INFO L129 PetriNetUnfolder]: 50/363 cut-off events. [2022-07-13 21:55:40,800 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:55:40,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1165 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 247. Up to 16 conditions per place. [2022-07-13 21:55:40,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 172 transitions, 374 flow [2022-07-13 21:55:40,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 172 transitions, 374 flow [2022-07-13 21:55:40,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:55:40,815 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:55:40,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:55:40,826 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2022-07-13 21:55:40,827 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:40,827 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:40,827 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] [2022-07-13 21:55:40,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1331531980, now seen corresponding path program 1 times [2022-07-13 21:55:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128383590] [2022-07-13 21:55:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:40,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128383590] [2022-07-13 21:55:40,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128383590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:40,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:40,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:55:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091261229] [2022-07-13 21:55:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:55:40,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:55:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:55:40,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 172 [2022-07-13 21:55:40,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 374 flow. Second operand has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:40,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 172 [2022-07-13 21:55:40,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:40,941 INFO L129 PetriNetUnfolder]: 8/317 cut-off events. [2022-07-13 21:55:40,941 INFO L130 PetriNetUnfolder]: For 50/58 co-relation queries the response was YES. [2022-07-13 21:55:40,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 317 events. 8/317 cut-off events. For 50/58 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 983 event pairs, 1 based on Foata normal form. 106/407 useless extension candidates. Maximal degree in co-relation 222. Up to 16 conditions per place. [2022-07-13 21:55:40,943 INFO L132 encePairwiseOnDemand]: 149/172 looper letters, 3 selfloop transitions, 0 changer transitions 22/148 dead transitions. [2022-07-13 21:55:40,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 148 transitions, 338 flow [2022-07-13 21:55:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:55:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:55:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 313 transitions. [2022-07-13 21:55:40,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9098837209302325 [2022-07-13 21:55:40,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 313 transitions. [2022-07-13 21:55:40,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 313 transitions. [2022-07-13 21:55:40,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:40,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 313 transitions. [2022-07-13 21:55:40,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,951 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,951 INFO L186 Difference]: Start difference. First operand has 153 places, 172 transitions, 374 flow. Second operand 2 states and 313 transitions. [2022-07-13 21:55:40,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 148 transitions, 338 flow [2022-07-13 21:55:40,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 148 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:40,957 INFO L242 Difference]: Finished difference. Result has 153 places, 126 transitions, 273 flow [2022-07-13 21:55:40,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=273, PETRI_PLACES=153, PETRI_TRANSITIONS=126} [2022-07-13 21:55:40,960 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-07-13 21:55:40,962 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 126 transitions, 273 flow [2022-07-13 21:55:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:40,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:40,963 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] [2022-07-13 21:55:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:55:40,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -465419379, now seen corresponding path program 1 times [2022-07-13 21:55:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508737919] [2022-07-13 21:55:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:40,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:41,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508737919] [2022-07-13 21:55:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508737919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:41,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:41,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:55:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798672909] [2022-07-13 21:55:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:55:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:55:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:55:41,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 172 [2022-07-13 21:55:41,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 126 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:41,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 172 [2022-07-13 21:55:41,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:41,073 INFO L129 PetriNetUnfolder]: 0/170 cut-off events. [2022-07-13 21:55:41,073 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:55:41,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 0/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-13 21:55:41,074 INFO L132 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-07-13 21:55:41,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 130 transitions, 309 flow [2022-07-13 21:55:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:55:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:55:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2022-07-13 21:55:41,076 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.813953488372093 [2022-07-13 21:55:41,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2022-07-13 21:55:41,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2022-07-13 21:55:41,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:41,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2022-07-13 21:55:41,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,082 INFO L186 Difference]: Start difference. First operand has 153 places, 126 transitions, 273 flow. Second operand 3 states and 420 transitions. [2022-07-13 21:55:41,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 130 transitions, 309 flow [2022-07-13 21:55:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 130 transitions, 303 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:41,086 INFO L242 Difference]: Finished difference. Result has 137 places, 127 transitions, 279 flow [2022-07-13 21:55:41,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=137, PETRI_TRANSITIONS=127} [2022-07-13 21:55:41,087 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, -16 predicate places. [2022-07-13 21:55:41,087 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 127 transitions, 279 flow [2022-07-13 21:55:41,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:41,088 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] [2022-07-13 21:55:41,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:55:41,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1218491345, now seen corresponding path program 1 times [2022-07-13 21:55:41,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:41,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786468486] [2022-07-13 21:55:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:41,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786468486] [2022-07-13 21:55:41,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786468486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:55:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705674970] [2022-07-13 21:55:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:41,152 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) [2022-07-13 21:55:41,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:55:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:55:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:55:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:41,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:55:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:41,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705674970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:55:41,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:55:41,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:55:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056920896] [2022-07-13 21:55:41,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:55:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:55:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:55:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:55:41,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 172 [2022-07-13 21:55:41,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 127 transitions, 279 flow. Second operand has 10 states, 10 states have (on average 136.3) internal successors, (1363), 10 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:41,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 172 [2022-07-13 21:55:41,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:41,427 INFO L129 PetriNetUnfolder]: 0/148 cut-off events. [2022-07-13 21:55:41,428 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 21:55:41,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 148 events. 0/148 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 203 event pairs, 0 based on Foata normal form. 2/150 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-13 21:55:41,429 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2022-07-13 21:55:41,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 137 transitions, 345 flow [2022-07-13 21:55:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:55:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:55:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1230 transitions. [2022-07-13 21:55:41,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945736434108527 [2022-07-13 21:55:41,433 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1230 transitions. [2022-07-13 21:55:41,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1230 transitions. [2022-07-13 21:55:41,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:41,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1230 transitions. [2022-07-13 21:55:41,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.66666666666666) internal successors, (1230), 9 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,441 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,441 INFO L186 Difference]: Start difference. First operand has 137 places, 127 transitions, 279 flow. Second operand 9 states and 1230 transitions. [2022-07-13 21:55:41,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 137 transitions, 345 flow [2022-07-13 21:55:41,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 137 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:55:41,445 INFO L242 Difference]: Finished difference. Result has 147 places, 133 transitions, 327 flow [2022-07-13 21:55:41,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=147, PETRI_TRANSITIONS=133} [2022-07-13 21:55:41,447 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, -6 predicate places. [2022-07-13 21:55:41,447 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 327 flow [2022-07-13 21:55:41,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.3) internal successors, (1363), 10 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:41,450 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:41,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:55:41,663 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,SelfDestructingSolverStorable8 [2022-07-13 21:55:41,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -284841927, now seen corresponding path program 1 times [2022-07-13 21:55:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897905216] [2022-07-13 21:55:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:41,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:41,699 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:55:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:41,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:55:41,738 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:55:41,738 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:55:41,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:55:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:55:41,739 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:55:41,739 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:55:41,739 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:55:41,764 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:55:41,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 178 places, 202 transitions, 448 flow [2022-07-13 21:55:41,843 INFO L129 PetriNetUnfolder]: 81/555 cut-off events. [2022-07-13 21:55:41,843 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:55:41,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 555 events. 81/555 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2074 event pairs, 6 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2022-07-13 21:55:41,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 202 transitions, 448 flow [2022-07-13 21:55:41,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 202 transitions, 448 flow [2022-07-13 21:55:41,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:55:41,857 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:55:41,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:55:41,862 INFO L129 PetriNetUnfolder]: 3/80 cut-off events. [2022-07-13 21:55:41,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:41,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:41,862 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] [2022-07-13 21:55:41,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 129103062, now seen corresponding path program 1 times [2022-07-13 21:55:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354948711] [2022-07-13 21:55:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:41,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:41,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354948711] [2022-07-13 21:55:41,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354948711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:41,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:41,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:55:41,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518530205] [2022-07-13 21:55:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:55:41,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:55:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:55:41,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 202 [2022-07-13 21:55:41,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 448 flow. Second operand has 2 states, 2 states have (on average 164.5) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:41,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 202 [2022-07-13 21:55:41,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:41,980 INFO L129 PetriNetUnfolder]: 21/490 cut-off events. [2022-07-13 21:55:41,980 INFO L130 PetriNetUnfolder]: For 130/152 co-relation queries the response was YES. [2022-07-13 21:55:41,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 490 events. 21/490 cut-off events. For 130/152 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1897 event pairs, 6 based on Foata normal form. 252/716 useless extension candidates. Maximal degree in co-relation 352. Up to 37 conditions per place. [2022-07-13 21:55:41,985 INFO L132 encePairwiseOnDemand]: 173/202 looper letters, 4 selfloop transitions, 0 changer transitions 23/172 dead transitions. [2022-07-13 21:55:41,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 172 transitions, 404 flow [2022-07-13 21:55:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:55:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:55:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 365 transitions. [2022-07-13 21:55:41,987 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9034653465346535 [2022-07-13 21:55:41,987 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 365 transitions. [2022-07-13 21:55:41,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 365 transitions. [2022-07-13 21:55:41,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:41,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 365 transitions. [2022-07-13 21:55:41,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 182.5) internal successors, (365), 2 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,989 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,989 INFO L186 Difference]: Start difference. First operand has 178 places, 202 transitions, 448 flow. Second operand 2 states and 365 transitions. [2022-07-13 21:55:41,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 172 transitions, 404 flow [2022-07-13 21:55:41,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 172 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:41,994 INFO L242 Difference]: Finished difference. Result has 178 places, 149 transitions, 330 flow [2022-07-13 21:55:41,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=330, PETRI_PLACES=178, PETRI_TRANSITIONS=149} [2022-07-13 21:55:41,995 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 0 predicate places. [2022-07-13 21:55:41,996 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 149 transitions, 330 flow [2022-07-13 21:55:41,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 164.5) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:41,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:41,996 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] [2022-07-13 21:55:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:55:41,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1667848297, now seen corresponding path program 1 times [2022-07-13 21:55:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406294807] [2022-07-13 21:55:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406294807] [2022-07-13 21:55:42,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406294807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:42,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:42,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:55:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230797662] [2022-07-13 21:55:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:42,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:55:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:55:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:55:42,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 202 [2022-07-13 21:55:42,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 149 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:42,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 202 [2022-07-13 21:55:42,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:42,094 INFO L129 PetriNetUnfolder]: 0/213 cut-off events. [2022-07-13 21:55:42,094 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:55:42,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 213 events. 0/213 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 469 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-13 21:55:42,095 INFO L132 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2022-07-13 21:55:42,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 153 transitions, 368 flow [2022-07-13 21:55:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:55:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:55:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-07-13 21:55:42,097 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8036303630363036 [2022-07-13 21:55:42,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-07-13 21:55:42,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-07-13 21:55:42,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:42,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-07-13 21:55:42,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,100 INFO L186 Difference]: Start difference. First operand has 178 places, 149 transitions, 330 flow. Second operand 3 states and 487 transitions. [2022-07-13 21:55:42,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 153 transitions, 368 flow [2022-07-13 21:55:42,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 356 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:42,104 INFO L242 Difference]: Finished difference. Result has 162 places, 150 transitions, 330 flow [2022-07-13 21:55:42,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=162, PETRI_TRANSITIONS=150} [2022-07-13 21:55:42,105 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, -16 predicate places. [2022-07-13 21:55:42,105 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 150 transitions, 330 flow [2022-07-13 21:55:42,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,106 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:42,106 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] [2022-07-13 21:55:42,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:55:42,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash -377138667, now seen corresponding path program 1 times [2022-07-13 21:55:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:42,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251471125] [2022-07-13 21:55:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:42,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:42,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251471125] [2022-07-13 21:55:42,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251471125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:55:42,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912534319] [2022-07-13 21:55:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:42,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:42,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:42,149 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) [2022-07-13 21:55:42,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:55:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:55:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:55:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:42,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:55:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:42,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912534319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:55:42,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:55:42,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:55:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113633732] [2022-07-13 21:55:42,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:55:42,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:55:42,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:55:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:55:42,294 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 202 [2022-07-13 21:55:42,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 150 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 158.3) internal successors, (1583), 10 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:42,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 202 [2022-07-13 21:55:42,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:42,383 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2022-07-13 21:55:42,383 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:55:42,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 191 events. 0/191 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-13 21:55:42,384 INFO L132 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/160 dead transitions. [2022-07-13 21:55:42,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 160 transitions, 398 flow [2022-07-13 21:55:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:55:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:55:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1429 transitions. [2022-07-13 21:55:42,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.786028602860286 [2022-07-13 21:55:42,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1429 transitions. [2022-07-13 21:55:42,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1429 transitions. [2022-07-13 21:55:42,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:42,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1429 transitions. [2022-07-13 21:55:42,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.77777777777777) internal successors, (1429), 9 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,398 INFO L186 Difference]: Start difference. First operand has 162 places, 150 transitions, 330 flow. Second operand 9 states and 1429 transitions. [2022-07-13 21:55:42,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 160 transitions, 398 flow [2022-07-13 21:55:42,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 160 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:55:42,403 INFO L242 Difference]: Finished difference. Result has 172 places, 156 transitions, 378 flow [2022-07-13 21:55:42,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=378, PETRI_PLACES=172, PETRI_TRANSITIONS=156} [2022-07-13 21:55:42,405 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, -6 predicate places. [2022-07-13 21:55:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 156 transitions, 378 flow [2022-07-13 21:55:42,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.3) internal successors, (1583), 10 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:42,406 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:42,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:55:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:42,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1222982828, now seen corresponding path program 1 times [2022-07-13 21:55:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:42,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176314948] [2022-07-13 21:55:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:55:42,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176314948] [2022-07-13 21:55:42,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176314948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:42,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:42,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:55:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331035818] [2022-07-13 21:55:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:55:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:42,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:55:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:55:42,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 202 [2022-07-13 21:55:42,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 156 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:42,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:42,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 202 [2022-07-13 21:55:42,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:48,583 INFO L129 PetriNetUnfolder]: 16742/41403 cut-off events. [2022-07-13 21:55:48,584 INFO L130 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-07-13 21:55:48,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64820 conditions, 41403 events. 16742/41403 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 493944 event pairs, 10951 based on Foata normal form. 750/41592 useless extension candidates. Maximal degree in co-relation 64809. Up to 14189 conditions per place. [2022-07-13 21:55:49,012 INFO L132 encePairwiseOnDemand]: 194/202 looper letters, 31 selfloop transitions, 5 changer transitions 53/220 dead transitions. [2022-07-13 21:55:49,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 699 flow [2022-07-13 21:55:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:55:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:55:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1085 transitions. [2022-07-13 21:55:49,016 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7673267326732673 [2022-07-13 21:55:49,017 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1085 transitions. [2022-07-13 21:55:49,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1085 transitions. [2022-07-13 21:55:49,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:49,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1085 transitions. [2022-07-13 21:55:49,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,024 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,024 INFO L186 Difference]: Start difference. First operand has 172 places, 156 transitions, 378 flow. Second operand 7 states and 1085 transitions. [2022-07-13 21:55:49,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 699 flow [2022-07-13 21:55:49,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 220 transitions, 693 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 21:55:49,030 INFO L242 Difference]: Finished difference. Result has 182 places, 160 transitions, 429 flow [2022-07-13 21:55:49,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=182, PETRI_TRANSITIONS=160} [2022-07-13 21:55:49,032 INFO L279 CegarLoopForPetriNet]: 178 programPoint places, 4 predicate places. [2022-07-13 21:55:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 160 transitions, 429 flow [2022-07-13 21:55:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:49,033 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:49,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:55:49,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:49,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1520636748, now seen corresponding path program 1 times [2022-07-13 21:55:49,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:49,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866311813] [2022-07-13 21:55:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:49,058 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:55:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:55:49,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:55:49,094 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:55:49,095 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:55:49,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:55:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:55:49,095 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:55:49,097 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:55:49,097 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:55:49,125 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:55:49,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 232 transitions, 524 flow [2022-07-13 21:55:49,233 INFO L129 PetriNetUnfolder]: 140/887 cut-off events. [2022-07-13 21:55:49,233 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:55:49,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 887 events. 140/887 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3951 event pairs, 23 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 600. Up to 80 conditions per place. [2022-07-13 21:55:49,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 232 transitions, 524 flow [2022-07-13 21:55:49,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 232 transitions, 524 flow [2022-07-13 21:55:49,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:55:49,257 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:55:49,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:55:49,261 INFO L129 PetriNetUnfolder]: 4/81 cut-off events. [2022-07-13 21:55:49,261 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:55:49,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:49,262 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] [2022-07-13 21:55:49,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1900696193, now seen corresponding path program 1 times [2022-07-13 21:55:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:49,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390355703] [2022-07-13 21:55:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:49,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390355703] [2022-07-13 21:55:49,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390355703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:49,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:49,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:55:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332072333] [2022-07-13 21:55:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:55:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:55:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:55:49,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 232 [2022-07-13 21:55:49,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 232 transitions, 524 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:49,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 232 [2022-07-13 21:55:49,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:49,428 INFO L129 PetriNetUnfolder]: 53/778 cut-off events. [2022-07-13 21:55:49,428 INFO L130 PetriNetUnfolder]: For 312/434 co-relation queries the response was YES. [2022-07-13 21:55:49,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 778 events. 53/778 cut-off events. For 312/434 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3646 event pairs, 23 based on Foata normal form. 880/1616 useless extension candidates. Maximal degree in co-relation 578. Up to 110 conditions per place. [2022-07-13 21:55:49,438 INFO L132 encePairwiseOnDemand]: 194/232 looper letters, 14 selfloop transitions, 2 changer transitions 24/200 dead transitions. [2022-07-13 21:55:49,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 200 transitions, 502 flow [2022-07-13 21:55:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:55:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:55:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-07-13 21:55:49,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8635057471264368 [2022-07-13 21:55:49,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-07-13 21:55:49,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-07-13 21:55:49,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:49,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-07-13 21:55:49,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,446 INFO L186 Difference]: Start difference. First operand has 203 places, 232 transitions, 524 flow. Second operand 3 states and 601 transitions. [2022-07-13 21:55:49,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 200 transitions, 502 flow [2022-07-13 21:55:49,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 200 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:55:49,451 INFO L242 Difference]: Finished difference. Result has 205 places, 173 transitions, 401 flow [2022-07-13 21:55:49,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=205, PETRI_TRANSITIONS=173} [2022-07-13 21:55:49,452 INFO L279 CegarLoopForPetriNet]: 203 programPoint places, 2 predicate places. [2022-07-13 21:55:49,453 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 173 transitions, 401 flow [2022-07-13 21:55:49,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:49,453 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] [2022-07-13 21:55:49,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:55:49,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:49,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1466405095, now seen corresponding path program 1 times [2022-07-13 21:55:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:49,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176076676] [2022-07-13 21:55:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176076676] [2022-07-13 21:55:49,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176076676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:55:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323727041] [2022-07-13 21:55:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:49,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:55:49,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:55:49,495 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) [2022-07-13 21:55:49,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:55:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:49,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:55:49,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:55:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:49,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:55:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:49,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323727041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:55:49,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:55:49,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:55:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141322043] [2022-07-13 21:55:49,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:55:49,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:55:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:55:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:55:49,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 232 [2022-07-13 21:55:49,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 173 transitions, 401 flow. Second operand has 10 states, 10 states have (on average 180.3) internal successors, (1803), 10 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:49,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 232 [2022-07-13 21:55:49,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:49,751 INFO L129 PetriNetUnfolder]: 0/234 cut-off events. [2022-07-13 21:55:49,751 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 21:55:49,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 234 events. 0/234 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 486 event pairs, 0 based on Foata normal form. 2/236 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-13 21:55:49,752 INFO L132 encePairwiseOnDemand]: 226/232 looper letters, 15 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2022-07-13 21:55:49,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 183 transitions, 471 flow [2022-07-13 21:55:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:55:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:55:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1628 transitions. [2022-07-13 21:55:49,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7796934865900383 [2022-07-13 21:55:49,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1628 transitions. [2022-07-13 21:55:49,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1628 transitions. [2022-07-13 21:55:49,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:49,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1628 transitions. [2022-07-13 21:55:49,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.88888888888889) internal successors, (1628), 9 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 232.0) internal successors, (2320), 10 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,767 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 232.0) internal successors, (2320), 10 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,767 INFO L186 Difference]: Start difference. First operand has 205 places, 173 transitions, 401 flow. Second operand 9 states and 1628 transitions. [2022-07-13 21:55:49,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 183 transitions, 471 flow [2022-07-13 21:55:49,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 183 transitions, 449 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-13 21:55:49,771 INFO L242 Difference]: Finished difference. Result has 196 places, 179 transitions, 429 flow [2022-07-13 21:55:49,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=429, PETRI_PLACES=196, PETRI_TRANSITIONS=179} [2022-07-13 21:55:49,773 INFO L279 CegarLoopForPetriNet]: 203 programPoint places, -7 predicate places. [2022-07-13 21:55:49,773 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 179 transitions, 429 flow [2022-07-13 21:55:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.3) internal successors, (1803), 10 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:49,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:49,774 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:49,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:55:49,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:55:49,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:55:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1626486160, now seen corresponding path program 1 times [2022-07-13 21:55:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810892466] [2022-07-13 21:55:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:50,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:55:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810892466] [2022-07-13 21:55:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810892466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:50,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:50,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:55:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881434391] [2022-07-13 21:55:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:55:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:55:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:55:50,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 232 [2022-07-13 21:55:50,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 179 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:50,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:50,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 232 [2022-07-13 21:55:50,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:18,746 INFO L129 PetriNetUnfolder]: 110509/244941 cut-off events. [2022-07-13 21:56:18,746 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-07-13 21:56:21,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389198 conditions, 244941 events. 110509/244941 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8950. Compared 3345318 event pairs, 76730 based on Foata normal form. 3875/246555 useless extension candidates. Maximal degree in co-relation 247676. Up to 88950 conditions per place. [2022-07-13 21:56:22,371 INFO L132 encePairwiseOnDemand]: 223/232 looper letters, 38 selfloop transitions, 6 changer transitions 65/258 dead transitions. [2022-07-13 21:56:22,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 258 transitions, 825 flow [2022-07-13 21:56:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:56:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:56:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1231 transitions. [2022-07-13 21:56:22,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7580049261083743 [2022-07-13 21:56:22,374 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1231 transitions. [2022-07-13 21:56:22,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1231 transitions. [2022-07-13 21:56:22,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:22,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1231 transitions. [2022-07-13 21:56:22,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:22,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 232.0) internal successors, (1856), 8 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:22,381 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 232.0) internal successors, (1856), 8 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:22,381 INFO L186 Difference]: Start difference. First operand has 196 places, 179 transitions, 429 flow. Second operand 7 states and 1231 transitions. [2022-07-13 21:56:22,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 258 transitions, 825 flow [2022-07-13 21:56:22,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 258 transitions, 819 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:22,392 INFO L242 Difference]: Finished difference. Result has 206 places, 184 transitions, 491 flow [2022-07-13 21:56:22,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=206, PETRI_TRANSITIONS=184} [2022-07-13 21:56:22,393 INFO L279 CegarLoopForPetriNet]: 203 programPoint places, 3 predicate places. [2022-07-13 21:56:22,393 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 184 transitions, 491 flow [2022-07-13 21:56:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:22,393 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:22,395 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:22,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:56:22,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1098256890, now seen corresponding path program 1 times [2022-07-13 21:56:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:22,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248708659] [2022-07-13 21:56:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:22,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248708659] [2022-07-13 21:56:22,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248708659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843301683] [2022-07-13 21:56:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:22,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:22,468 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) [2022-07-13 21:56:22,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:56:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:22,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:22,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843301683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:22,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:22,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416431373] [2022-07-13 21:56:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:22,755 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 232 [2022-07-13 21:56:22,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 184 transitions, 491 flow. Second operand has 18 states, 18 states have (on average 180.61111111111111) internal successors, (3251), 18 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:22,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:22,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 232 [2022-07-13 21:56:22,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:23,004 INFO L129 PetriNetUnfolder]: 49/640 cut-off events. [2022-07-13 21:56:23,004 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-13 21:56:23,012 INFO L84 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 640 events. 49/640 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3350 event pairs, 23 based on Foata normal form. 3/626 useless extension candidates. Maximal degree in co-relation 956. Up to 81 conditions per place. [2022-07-13 21:56:23,014 INFO L132 encePairwiseOnDemand]: 227/232 looper letters, 18 selfloop transitions, 16 changer transitions 0/188 dead transitions. [2022-07-13 21:56:23,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 188 transitions, 579 flow [2022-07-13 21:56:23,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:56:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:56:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3241 transitions. [2022-07-13 21:56:23,021 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7761015325670498 [2022-07-13 21:56:23,021 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3241 transitions. [2022-07-13 21:56:23,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3241 transitions. [2022-07-13 21:56:23,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:23,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3241 transitions. [2022-07-13 21:56:23,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 180.05555555555554) internal successors, (3241), 18 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 232.0) internal successors, (4408), 19 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,051 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 232.0) internal successors, (4408), 19 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,052 INFO L186 Difference]: Start difference. First operand has 206 places, 184 transitions, 491 flow. Second operand 18 states and 3241 transitions. [2022-07-13 21:56:23,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 188 transitions, 579 flow [2022-07-13 21:56:23,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 188 transitions, 542 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-13 21:56:23,056 INFO L242 Difference]: Finished difference. Result has 202 places, 179 transitions, 478 flow [2022-07-13 21:56:23,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=478, PETRI_PLACES=202, PETRI_TRANSITIONS=179} [2022-07-13 21:56:23,057 INFO L279 CegarLoopForPetriNet]: 203 programPoint places, -1 predicate places. [2022-07-13 21:56:23,057 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 179 transitions, 478 flow [2022-07-13 21:56:23,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 180.61111111111111) internal successors, (3251), 18 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,058 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:23,058 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:23,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:23,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:23,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -901390650, now seen corresponding path program 1 times [2022-07-13 21:56:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053869030] [2022-07-13 21:56:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:23,299 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:23,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:23,324 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:23,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:23,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:56:23,324 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:23,325 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:23,325 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-13 21:56:23,349 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-13 21:56:23,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 262 transitions, 602 flow [2022-07-13 21:56:23,515 INFO L129 PetriNetUnfolder]: 263/1507 cut-off events. [2022-07-13 21:56:23,515 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-13 21:56:23,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 1507 events. 263/1507 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8282 event pairs, 72 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 986. Up to 192 conditions per place. [2022-07-13 21:56:23,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 262 transitions, 602 flow [2022-07-13 21:56:23,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 262 transitions, 602 flow [2022-07-13 21:56:23,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:23,555 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@14921378, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20eb6425 [2022-07-13 21:56:23,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:23,559 INFO L129 PetriNetUnfolder]: 4/79 cut-off events. [2022-07-13 21:56:23,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:23,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:23,559 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] [2022-07-13 21:56:23,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 632988292, now seen corresponding path program 1 times [2022-07-13 21:56:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725571570] [2022-07-13 21:56:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:23,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725571570] [2022-07-13 21:56:23,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725571570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:23,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:23,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621999465] [2022-07-13 21:56:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:23,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 262 [2022-07-13 21:56:23,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 262 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:23,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 262 [2022-07-13 21:56:23,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:23,801 INFO L129 PetriNetUnfolder]: 135/1372 cut-off events. [2022-07-13 21:56:23,801 INFO L130 PetriNetUnfolder]: For 655/687 co-relation queries the response was YES. [2022-07-13 21:56:23,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 1372 events. 135/1372 cut-off events. For 655/687 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8010 event pairs, 72 based on Foata normal form. 1314/2608 useless extension candidates. Maximal degree in co-relation 979. Up to 199 conditions per place. [2022-07-13 21:56:23,820 INFO L132 encePairwiseOnDemand]: 221/262 looper letters, 6 selfloop transitions, 0 changer transitions 25/220 dead transitions. [2022-07-13 21:56:23,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 220 transitions, 542 flow [2022-07-13 21:56:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 469 transitions. [2022-07-13 21:56:23,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8950381679389313 [2022-07-13 21:56:23,822 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 469 transitions. [2022-07-13 21:56:23,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 469 transitions. [2022-07-13 21:56:23,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:23,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 469 transitions. [2022-07-13 21:56:23,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 234.5) internal successors, (469), 2 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,824 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,824 INFO L186 Difference]: Start difference. First operand has 228 places, 262 transitions, 602 flow. Second operand 2 states and 469 transitions. [2022-07-13 21:56:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 220 transitions, 542 flow [2022-07-13 21:56:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 220 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:23,829 INFO L242 Difference]: Finished difference. Result has 228 places, 195 transitions, 450 flow [2022-07-13 21:56:23,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=450, PETRI_PLACES=228, PETRI_TRANSITIONS=195} [2022-07-13 21:56:23,830 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-13 21:56:23,830 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 195 transitions, 450 flow [2022-07-13 21:56:23,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:23,831 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] [2022-07-13 21:56:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:56:23,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1163963067, now seen corresponding path program 1 times [2022-07-13 21:56:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:23,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440013152] [2022-07-13 21:56:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:23,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440013152] [2022-07-13 21:56:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440013152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:23,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:23,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018487952] [2022-07-13 21:56:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:23,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 262 [2022-07-13 21:56:23,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 195 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:23,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 262 [2022-07-13 21:56:23,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:23,908 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2022-07-13 21:56:23,908 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-13 21:56:23,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 299 events. 0/299 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 750 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-13 21:56:23,909 INFO L132 encePairwiseOnDemand]: 259/262 looper letters, 15 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2022-07-13 21:56:23,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 199 transitions, 492 flow [2022-07-13 21:56:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2022-07-13 21:56:23,910 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7900763358778626 [2022-07-13 21:56:23,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2022-07-13 21:56:23,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2022-07-13 21:56:23,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:23,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2022-07-13 21:56:23,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,914 INFO L186 Difference]: Start difference. First operand has 228 places, 195 transitions, 450 flow. Second operand 3 states and 621 transitions. [2022-07-13 21:56:23,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 199 transitions, 492 flow [2022-07-13 21:56:23,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 199 transitions, 462 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:23,918 INFO L242 Difference]: Finished difference. Result has 212 places, 196 transitions, 432 flow [2022-07-13 21:56:23,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=212, PETRI_TRANSITIONS=196} [2022-07-13 21:56:23,919 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -16 predicate places. [2022-07-13 21:56:23,919 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 196 transitions, 432 flow [2022-07-13 21:56:23,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:23,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:23,919 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:56:23,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -191323333, now seen corresponding path program 1 times [2022-07-13 21:56:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819810932] [2022-07-13 21:56:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:23,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819810932] [2022-07-13 21:56:23,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819810932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459863143] [2022-07-13 21:56:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:23,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:23,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:23,962 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) [2022-07-13 21:56:23,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:56:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:24,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:24,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459863143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:24,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:24,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812395608] [2022-07-13 21:56:24,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:24,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:24,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 262 [2022-07-13 21:56:24,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 196 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 202.3) internal successors, (2023), 10 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:24,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 262 [2022-07-13 21:56:24,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:24,225 INFO L129 PetriNetUnfolder]: 0/277 cut-off events. [2022-07-13 21:56:24,225 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:56:24,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 277 events. 0/277 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 632 event pairs, 0 based on Foata normal form. 2/279 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-13 21:56:24,226 INFO L132 encePairwiseOnDemand]: 256/262 looper letters, 16 selfloop transitions, 9 changer transitions 0/206 dead transitions. [2022-07-13 21:56:24,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 206 transitions, 504 flow [2022-07-13 21:56:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1827 transitions. [2022-07-13 21:56:24,231 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7748091603053435 [2022-07-13 21:56:24,231 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1827 transitions. [2022-07-13 21:56:24,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1827 transitions. [2022-07-13 21:56:24,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:24,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1827 transitions. [2022-07-13 21:56:24,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.0) internal successors, (1827), 9 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,240 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,240 INFO L186 Difference]: Start difference. First operand has 212 places, 196 transitions, 432 flow. Second operand 9 states and 1827 transitions. [2022-07-13 21:56:24,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 206 transitions, 504 flow [2022-07-13 21:56:24,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 206 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:24,358 INFO L242 Difference]: Finished difference. Result has 222 places, 202 transitions, 480 flow [2022-07-13 21:56:24,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=480, PETRI_PLACES=222, PETRI_TRANSITIONS=202} [2022-07-13 21:56:24,359 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -6 predicate places. [2022-07-13 21:56:24,359 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 202 transitions, 480 flow [2022-07-13 21:56:24,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 202.3) internal successors, (2023), 10 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:24,360 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:24,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:24,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:24,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash 600504682, now seen corresponding path program 1 times [2022-07-13 21:56:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451023164] [2022-07-13 21:56:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:56:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451023164] [2022-07-13 21:56:24,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451023164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:24,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:24,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:56:24,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643155715] [2022-07-13 21:56:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:24,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:56:24,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:56:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:56:24,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 262 [2022-07-13 21:56:24,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 202 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 179.6) internal successors, (898), 5 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:24,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:24,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 262 [2022-07-13 21:56:24,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand