./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_41-trylock_racefree.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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:34:06,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:34:06,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:34:06,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:34:06,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:34:06,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:34:06,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:34:06,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:34:06,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:34:06,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:34:06,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:34:06,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:34:06,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:34:06,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:34:06,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:34:06,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:34:06,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:34:06,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:34:06,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:34:06,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:34:06,746 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:34:06,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:34:06,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:34:06,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:34:06,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:34:06,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:34:06,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:34:06,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:34:06,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:34:06,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:34:06,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:34:06,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:34:06,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:34:06,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:34:06,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:34:06,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:34:06,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:34:06,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:34:06,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:34:06,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:34:06,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:34:06,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:34:06,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:34:06,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:34:06,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:34:06,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:34:06,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:34:06,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:34:06,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:34:06,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:34:06,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:34:06,789 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:34:06,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:34:06,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:34:06,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:34:06,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:34:06,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:34:06,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:34:06,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:34:06,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:34:06,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:34:06,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:34:06,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:06,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:34:06,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:34:06,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:34:06,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:34:06,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:34:06,794 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:34:06,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:34:06,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:34:06,794 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2022-07-22 21:34:07,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:34:07,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:34:07,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:34:07,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:34:07,040 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:34:07,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-07-22 21:34:07,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9789439/1bd350e4a8424a3880c0e426f95b5641/FLAG0c07c6e05 [2022-07-22 21:34:07,509 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:34:07,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-07-22 21:34:07,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9789439/1bd350e4a8424a3880c0e426f95b5641/FLAG0c07c6e05 [2022-07-22 21:34:07,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9789439/1bd350e4a8424a3880c0e426f95b5641 [2022-07-22 21:34:07,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:34:07,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:34:07,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:07,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:34:07,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:34:07,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:07" (1/1) ... [2022-07-22 21:34:07,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401e9c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:07, skipping insertion in model container [2022-07-22 21:34:07,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:07" (1/1) ... [2022-07-22 21:34:07,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:34:07,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:34:08,068 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_41-trylock_racefree.i[30176,30189] [2022-07-22 21:34:08,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:08,088 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:34:08,114 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_41-trylock_racefree.i[30176,30189] [2022-07-22 21:34:08,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:08,167 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:34:08,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08 WrapperNode [2022-07-22 21:34:08,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:08,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:08,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:34:08,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:34:08,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,219 INFO L137 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-07-22 21:34:08,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:08,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:34:08,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:34:08,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:34:08,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:34:08,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:34:08,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:34:08,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:34:08,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (1/1) ... [2022-07-22 21:34:08,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:08,325 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) [2022-07-22 21:34:08,346 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 [2022-07-22 21:34:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:34:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:34:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:34:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:34:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:34:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:34:08,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:34:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:34:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-07-22 21:34:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:34:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:34:08,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:34:08,364 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:34:08,447 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:34:08,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:34:08,590 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:34:08,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:34:08,596 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-22 21:34:08,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:08 BoogieIcfgContainer [2022-07-22 21:34:08,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:34:08,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:34:08,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:34:08,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:34:08,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:34:07" (1/3) ... [2022-07-22 21:34:08,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a33c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:08, skipping insertion in model container [2022-07-22 21:34:08,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:08" (2/3) ... [2022-07-22 21:34:08,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a33c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:08, skipping insertion in model container [2022-07-22 21:34:08,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:08" (3/3) ... [2022-07-22 21:34:08,603 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2022-07-22 21:34:08,607 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:34:08,613 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:34:08,614 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:34:08,614 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:34:08,645 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:34:08,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 109 transitions, 226 flow [2022-07-22 21:34:08,703 INFO L129 PetriNetUnfolder]: 21/149 cut-off events. [2022-07-22 21:34:08,703 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:08,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 21/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2022-07-22 21:34:08,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 109 transitions, 226 flow [2022-07-22 21:34:08,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 104 transitions, 213 flow [2022-07-22 21:34:08,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:08,722 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:08,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:08,734 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-07-22 21:34:08,734 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:08,734 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:08,735 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] [2022-07-22 21:34:08,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1705821278, now seen corresponding path program 1 times [2022-07-22 21:34:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840505908] [2022-07-22 21:34:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840505908] [2022-07-22 21:34:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840505908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:08,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:08,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:08,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016583598] [2022-07-22 21:34:08,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:08,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:08,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:08,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:08,914 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2022-07-22 21:34:08,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:08,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2022-07-22 21:34:08,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:08,962 INFO L129 PetriNetUnfolder]: 1/95 cut-off events. [2022-07-22 21:34:08,962 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:08,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 95 events. 1/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 23/114 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-07-22 21:34:08,964 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 8 selfloop transitions, 2 changer transitions 15/93 dead transitions. [2022-07-22 21:34:08,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 211 flow [2022-07-22 21:34:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2022-07-22 21:34:08,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8899082568807339 [2022-07-22 21:34:08,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2022-07-22 21:34:08,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2022-07-22 21:34:08,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:08,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2022-07-22 21:34:08,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,991 INFO L186 Difference]: Start difference. First operand has 94 places, 104 transitions, 213 flow. Second operand 3 states and 291 transitions. [2022-07-22 21:34:08,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 211 flow [2022-07-22 21:34:08,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:08,999 INFO L242 Difference]: Finished difference. Result has 96 places, 76 transitions, 165 flow [2022-07-22 21:34:09,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2022-07-22 21:34:09,004 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2022-07-22 21:34:09,004 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 165 flow [2022-07-22 21:34:09,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,005 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] [2022-07-22 21:34:09,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:34:09,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash 43909355, now seen corresponding path program 1 times [2022-07-22 21:34:09,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013924580] [2022-07-22 21:34:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,037 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:09,073 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:09,074 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:09,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:34:09,076 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:34:09,078 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:09,078 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:34:09,092 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:34:09,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 139 transitions, 296 flow [2022-07-22 21:34:09,125 INFO L129 PetriNetUnfolder]: 37/244 cut-off events. [2022-07-22 21:34:09,125 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:34:09,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 37/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-07-22 21:34:09,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 139 transitions, 296 flow [2022-07-22 21:34:09,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 139 transitions, 296 flow [2022-07-22 21:34:09,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:09,130 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:09,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:09,138 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-22 21:34:09,139 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:09,139 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,139 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] [2022-07-22 21:34:09,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash -398457143, now seen corresponding path program 1 times [2022-07-22 21:34:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388910788] [2022-07-22 21:34:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:09,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388910788] [2022-07-22 21:34:09,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388910788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:09,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:09,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975065189] [2022-07-22 21:34:09,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:09,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 139 [2022-07-22 21:34:09,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:09,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 139 [2022-07-22 21:34:09,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:09,213 INFO L129 PetriNetUnfolder]: 4/190 cut-off events. [2022-07-22 21:34:09,213 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-22 21:34:09,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 190 events. 4/190 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 80/260 useless extension candidates. Maximal degree in co-relation 123. Up to 16 conditions per place. [2022-07-22 21:34:09,214 INFO L132 encePairwiseOnDemand]: 118/139 looper letters, 11 selfloop transitions, 2 changer transitions 21/124 dead transitions. [2022-07-22 21:34:09,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 124 transitions, 296 flow [2022-07-22 21:34:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2022-07-22 21:34:09,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882494004796163 [2022-07-22 21:34:09,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2022-07-22 21:34:09,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2022-07-22 21:34:09,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:09,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2022-07-22 21:34:09,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,220 INFO L186 Difference]: Start difference. First operand has 123 places, 139 transitions, 296 flow. Second operand 3 states and 368 transitions. [2022-07-22 21:34:09,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 124 transitions, 296 flow [2022-07-22 21:34:09,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:09,223 INFO L242 Difference]: Finished difference. Result has 125 places, 100 transitions, 222 flow [2022-07-22 21:34:09,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=125, PETRI_TRANSITIONS=100} [2022-07-22 21:34:09,224 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2022-07-22 21:34:09,224 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 100 transitions, 222 flow [2022-07-22 21:34:09,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,224 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] [2022-07-22 21:34:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:34:09,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1351761021, now seen corresponding path program 1 times [2022-07-22 21:34:09,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326449256] [2022-07-22 21:34:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326449256] [2022-07-22 21:34:09,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326449256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449100227] [2022-07-22 21:34:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:09,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:09,282 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) [2022-07-22 21:34:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:34:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449100227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:09,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:09,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018707223] [2022-07-22 21:34:09,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:09,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 139 [2022-07-22 21:34:09,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 100 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:09,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 139 [2022-07-22 21:34:09,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:09,552 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2022-07-22 21:34:09,552 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:34:09,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 98 events. 0/98 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-22 21:34:09,553 INFO L132 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2022-07-22 21:34:09,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 236 flow [2022-07-22 21:34:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 990 transitions. [2022-07-22 21:34:09,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7913669064748201 [2022-07-22 21:34:09,557 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 990 transitions. [2022-07-22 21:34:09,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 990 transitions. [2022-07-22 21:34:09,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:09,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 990 transitions. [2022-07-22 21:34:09,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,564 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,564 INFO L186 Difference]: Start difference. First operand has 125 places, 100 transitions, 222 flow. Second operand 9 states and 990 transitions. [2022-07-22 21:34:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 236 flow [2022-07-22 21:34:09,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 232 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:09,566 INFO L242 Difference]: Finished difference. Result has 100 places, 88 transitions, 206 flow [2022-07-22 21:34:09,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2022-07-22 21:34:09,567 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -23 predicate places. [2022-07-22 21:34:09,567 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 206 flow [2022-07-22 21:34:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,568 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,569 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] [2022-07-22 21:34:09,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:09,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash -392863105, now seen corresponding path program 1 times [2022-07-22 21:34:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399691760] [2022-07-22 21:34:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,829 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:09,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:09,859 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:09,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:09,860 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:09,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:34:09,860 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:34:09,861 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:09,861 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:34:09,883 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:34:09,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 169 transitions, 368 flow [2022-07-22 21:34:09,925 INFO L129 PetriNetUnfolder]: 58/372 cut-off events. [2022-07-22 21:34:09,925 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:34:09,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 372 events. 58/372 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1231 event pairs, 1 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2022-07-22 21:34:09,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 169 transitions, 368 flow [2022-07-22 21:34:09,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 169 transitions, 368 flow [2022-07-22 21:34:09,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:09,945 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:09,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:09,951 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2022-07-22 21:34:09,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:09,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:09,951 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] [2022-07-22 21:34:09,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash -844642061, now seen corresponding path program 1 times [2022-07-22 21:34:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:09,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931067043] [2022-07-22 21:34:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:09,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931067043] [2022-07-22 21:34:09,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931067043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:09,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:09,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371497413] [2022-07-22 21:34:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:09,998 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 169 [2022-07-22 21:34:09,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:09,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 169 [2022-07-22 21:34:09,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:10,044 INFO L129 PetriNetUnfolder]: 12/322 cut-off events. [2022-07-22 21:34:10,044 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-22 21:34:10,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 322 events. 12/322 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1016 event pairs, 1 based on Foata normal form. 110/412 useless extension candidates. Maximal degree in co-relation 224. Up to 16 conditions per place. [2022-07-22 21:34:10,046 INFO L132 encePairwiseOnDemand]: 145/169 looper letters, 3 selfloop transitions, 0 changer transitions 22/144 dead transitions. [2022-07-22 21:34:10,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 144 transitions, 330 flow [2022-07-22 21:34:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 306 transitions. [2022-07-22 21:34:10,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9053254437869822 [2022-07-22 21:34:10,049 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 306 transitions. [2022-07-22 21:34:10,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 306 transitions. [2022-07-22 21:34:10,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:10,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 306 transitions. [2022-07-22 21:34:10,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,051 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,051 INFO L186 Difference]: Start difference. First operand has 148 places, 169 transitions, 368 flow. Second operand 2 states and 306 transitions. [2022-07-22 21:34:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 144 transitions, 330 flow [2022-07-22 21:34:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:10,056 INFO L242 Difference]: Finished difference. Result has 148 places, 122 transitions, 265 flow [2022-07-22 21:34:10,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=265, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2022-07-22 21:34:10,059 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, 0 predicate places. [2022-07-22 21:34:10,059 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 265 flow [2022-07-22 21:34:10,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,060 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] [2022-07-22 21:34:10,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:34:10,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2085235745, now seen corresponding path program 1 times [2022-07-22 21:34:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758179298] [2022-07-22 21:34:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758179298] [2022-07-22 21:34:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758179298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:10,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:10,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248006588] [2022-07-22 21:34:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:10,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 169 [2022-07-22 21:34:10,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:10,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 169 [2022-07-22 21:34:10,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:10,154 INFO L129 PetriNetUnfolder]: 3/172 cut-off events. [2022-07-22 21:34:10,155 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:34:10,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 172 events. 3/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 365 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 206. Up to 18 conditions per place. [2022-07-22 21:34:10,157 INFO L132 encePairwiseOnDemand]: 166/169 looper letters, 12 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-07-22 21:34:10,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 301 flow [2022-07-22 21:34:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-07-22 21:34:10,158 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047337278106509 [2022-07-22 21:34:10,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-07-22 21:34:10,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-07-22 21:34:10,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:10,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-07-22 21:34:10,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-07-22 21:34:10,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,164 INFO L186 Difference]: Start difference. First operand has 148 places, 122 transitions, 265 flow. Second operand 3 states and 408 transitions. [2022-07-22 21:34:10,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 301 flow [2022-07-22 21:34:10,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 295 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:10,168 INFO L242 Difference]: Finished difference. Result has 132 places, 123 transitions, 271 flow [2022-07-22 21:34:10,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-07-22 21:34:10,170 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, -16 predicate places. [2022-07-22 21:34:10,170 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 271 flow [2022-07-22 21:34:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,176 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] [2022-07-22 21:34:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:34:10,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -185774998, now seen corresponding path program 1 times [2022-07-22 21:34:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36024860] [2022-07-22 21:34:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36024860] [2022-07-22 21:34:10,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36024860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242812560] [2022-07-22 21:34:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:10,258 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) [2022-07-22 21:34:10,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:34:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242812560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:10,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:10,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896640181] [2022-07-22 21:34:10,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:10,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 169 [2022-07-22 21:34:10,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:10,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 169 [2022-07-22 21:34:10,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:10,426 INFO L129 PetriNetUnfolder]: 1/144 cut-off events. [2022-07-22 21:34:10,427 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:34:10,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 144 events. 1/144 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 182. Up to 7 conditions per place. [2022-07-22 21:34:10,428 INFO L132 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/133 dead transitions. [2022-07-22 21:34:10,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 337 flow [2022-07-22 21:34:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1194 transitions. [2022-07-22 21:34:10,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7850098619329389 [2022-07-22 21:34:10,430 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1194 transitions. [2022-07-22 21:34:10,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1194 transitions. [2022-07-22 21:34:10,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:10,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1194 transitions. [2022-07-22 21:34:10,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.66666666666666) internal successors, (1194), 9 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,435 INFO L186 Difference]: Start difference. First operand has 132 places, 123 transitions, 271 flow. Second operand 9 states and 1194 transitions. [2022-07-22 21:34:10,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 337 flow [2022-07-22 21:34:10,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 133 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:10,438 INFO L242 Difference]: Finished difference. Result has 142 places, 129 transitions, 319 flow [2022-07-22 21:34:10,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=319, PETRI_PLACES=142, PETRI_TRANSITIONS=129} [2022-07-22 21:34:10,438 INFO L279 CegarLoopForPetriNet]: 148 programPoint places, -6 predicate places. [2022-07-22 21:34:10,439 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 129 transitions, 319 flow [2022-07-22 21:34:10,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,439 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,439 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] [2022-07-22 21:34:10,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:34:10,656 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,SelfDestructingSolverStorable7 [2022-07-22 21:34:10,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 499831500, now seen corresponding path program 1 times [2022-07-22 21:34:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986673911] [2022-07-22 21:34:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:10,669 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:10,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:10,682 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:10,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:10,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:10,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:34:10,683 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:34:10,684 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:10,684 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:34:10,697 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:34:10,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 199 transitions, 442 flow [2022-07-22 21:34:10,750 INFO L129 PetriNetUnfolder]: 91/568 cut-off events. [2022-07-22 21:34:10,750 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:34:10,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 568 events. 91/568 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2160 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 392. Up to 32 conditions per place. [2022-07-22 21:34:10,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 199 transitions, 442 flow [2022-07-22 21:34:10,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 199 transitions, 442 flow [2022-07-22 21:34:10,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:10,759 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:10,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:10,762 INFO L129 PetriNetUnfolder]: 5/71 cut-off events. [2022-07-22 21:34:10,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:10,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,762 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] [2022-07-22 21:34:10,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash -25760486, now seen corresponding path program 1 times [2022-07-22 21:34:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748516882] [2022-07-22 21:34:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748516882] [2022-07-22 21:34:10,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748516882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:10,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:10,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614499078] [2022-07-22 21:34:10,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:10,775 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 199 [2022-07-22 21:34:10,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 199 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:10,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 199 [2022-07-22 21:34:10,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:10,828 INFO L129 PetriNetUnfolder]: 26/498 cut-off events. [2022-07-22 21:34:10,828 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-22 21:34:10,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 498 events. 26/498 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1961 event pairs, 6 based on Foata normal form. 257/724 useless extension candidates. Maximal degree in co-relation 357. Up to 37 conditions per place. [2022-07-22 21:34:10,831 INFO L132 encePairwiseOnDemand]: 169/199 looper letters, 4 selfloop transitions, 0 changer transitions 23/168 dead transitions. [2022-07-22 21:34:10,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 168 transitions, 396 flow [2022-07-22 21:34:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2022-07-22 21:34:10,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8994974874371859 [2022-07-22 21:34:10,833 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2022-07-22 21:34:10,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2022-07-22 21:34:10,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:10,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2022-07-22 21:34:10,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,835 INFO L186 Difference]: Start difference. First operand has 173 places, 199 transitions, 442 flow. Second operand 2 states and 358 transitions. [2022-07-22 21:34:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 168 transitions, 396 flow [2022-07-22 21:34:10,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 168 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:10,838 INFO L242 Difference]: Finished difference. Result has 173 places, 145 transitions, 322 flow [2022-07-22 21:34:10,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2022-07-22 21:34:10,839 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 0 predicate places. [2022-07-22 21:34:10,839 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 322 flow [2022-07-22 21:34:10,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,839 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,839 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] [2022-07-22 21:34:10,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:34:10,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1243546776, now seen corresponding path program 1 times [2022-07-22 21:34:10,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520781344] [2022-07-22 21:34:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520781344] [2022-07-22 21:34:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520781344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:10,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:10,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203802041] [2022-07-22 21:34:10,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:10,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 199 [2022-07-22 21:34:10,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:10,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 199 [2022-07-22 21:34:10,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:10,885 INFO L129 PetriNetUnfolder]: 4/218 cut-off events. [2022-07-22 21:34:10,885 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:34:10,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 218 events. 4/218 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 521 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 264. Up to 24 conditions per place. [2022-07-22 21:34:10,887 INFO L132 encePairwiseOnDemand]: 196/199 looper letters, 13 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2022-07-22 21:34:10,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 360 flow [2022-07-22 21:34:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2022-07-22 21:34:10,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956448911222781 [2022-07-22 21:34:10,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2022-07-22 21:34:10,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2022-07-22 21:34:10,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:10,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2022-07-22 21:34:10,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,891 INFO L186 Difference]: Start difference. First operand has 173 places, 145 transitions, 322 flow. Second operand 3 states and 475 transitions. [2022-07-22 21:34:10,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 360 flow [2022-07-22 21:34:10,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 348 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:10,893 INFO L242 Difference]: Finished difference. Result has 157 places, 146 transitions, 322 flow [2022-07-22 21:34:10,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=157, PETRI_TRANSITIONS=146} [2022-07-22 21:34:10,894 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, -16 predicate places. [2022-07-22 21:34:10,894 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 146 transitions, 322 flow [2022-07-22 21:34:10,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,895 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] [2022-07-22 21:34:10,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:34:10,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash -954141003, now seen corresponding path program 1 times [2022-07-22 21:34:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921808901] [2022-07-22 21:34:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921808901] [2022-07-22 21:34:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921808901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709921238] [2022-07-22 21:34:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:10,936 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) [2022-07-22 21:34:10,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:34:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:11,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709921238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:11,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:11,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849383749] [2022-07-22 21:34:11,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:11,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 199 [2022-07-22 21:34:11,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 146 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:11,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 199 [2022-07-22 21:34:11,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:11,120 INFO L129 PetriNetUnfolder]: 2/190 cut-off events. [2022-07-22 21:34:11,120 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:34:11,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 190 events. 2/190 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 240. Up to 11 conditions per place. [2022-07-22 21:34:11,121 INFO L132 encePairwiseOnDemand]: 193/199 looper letters, 14 selfloop transitions, 9 changer transitions 0/156 dead transitions. [2022-07-22 21:34:11,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 156 transitions, 390 flow [2022-07-22 21:34:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1393 transitions. [2022-07-22 21:34:11,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-07-22 21:34:11,124 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1393 transitions. [2022-07-22 21:34:11,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1393 transitions. [2022-07-22 21:34:11,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:11,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1393 transitions. [2022-07-22 21:34:11,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.77777777777777) internal successors, (1393), 9 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,130 INFO L186 Difference]: Start difference. First operand has 157 places, 146 transitions, 322 flow. Second operand 9 states and 1393 transitions. [2022-07-22 21:34:11,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 156 transitions, 390 flow [2022-07-22 21:34:11,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:11,133 INFO L242 Difference]: Finished difference. Result has 167 places, 152 transitions, 370 flow [2022-07-22 21:34:11,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=167, PETRI_TRANSITIONS=152} [2022-07-22 21:34:11,133 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, -6 predicate places. [2022-07-22 21:34:11,133 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 152 transitions, 370 flow [2022-07-22 21:34:11,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:11,134 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] [2022-07-22 21:34:11,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:11,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash -770173908, now seen corresponding path program 1 times [2022-07-22 21:34:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:11,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891516868] [2022-07-22 21:34:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:34:11,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:11,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891516868] [2022-07-22 21:34:11,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891516868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:11,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:11,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:34:11,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679637400] [2022-07-22 21:34:11,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:11,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:34:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:11,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:34:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:34:11,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 199 [2022-07-22 21:34:11,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 152 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:11,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:11,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 199 [2022-07-22 21:34:11,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:15,747 INFO L129 PetriNetUnfolder]: 16764/41462 cut-off events. [2022-07-22 21:34:15,747 INFO L130 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-07-22 21:34:15,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64879 conditions, 41462 events. 16764/41462 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 494905 event pairs, 10951 based on Foata normal form. 750/41629 useless extension candidates. Maximal degree in co-relation 64868. Up to 14189 conditions per place. [2022-07-22 21:34:16,070 INFO L132 encePairwiseOnDemand]: 191/199 looper letters, 31 selfloop transitions, 5 changer transitions 53/216 dead transitions. [2022-07-22 21:34:16,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 216 transitions, 691 flow [2022-07-22 21:34:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:34:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:34:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1057 transitions. [2022-07-22 21:34:16,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587939698492462 [2022-07-22 21:34:16,074 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1057 transitions. [2022-07-22 21:34:16,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1057 transitions. [2022-07-22 21:34:16,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:16,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1057 transitions. [2022-07-22 21:34:16,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,200 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,201 INFO L186 Difference]: Start difference. First operand has 167 places, 152 transitions, 370 flow. Second operand 7 states and 1057 transitions. [2022-07-22 21:34:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 216 transitions, 691 flow [2022-07-22 21:34:16,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 216 transitions, 685 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:16,204 INFO L242 Difference]: Finished difference. Result has 177 places, 156 transitions, 421 flow [2022-07-22 21:34:16,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=177, PETRI_TRANSITIONS=156} [2022-07-22 21:34:16,205 INFO L279 CegarLoopForPetriNet]: 173 programPoint places, 4 predicate places. [2022-07-22 21:34:16,205 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 156 transitions, 421 flow [2022-07-22 21:34:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:16,206 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] [2022-07-22 21:34:16,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:34:16,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1523698642, now seen corresponding path program 1 times [2022-07-22 21:34:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:16,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181332682] [2022-07-22 21:34:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:16,236 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:16,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:16,272 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:16,272 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:16,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:34:16,273 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:34:16,274 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:16,274 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:34:16,297 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:34:16,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 229 transitions, 518 flow [2022-07-22 21:34:16,375 INFO L129 PetriNetUnfolder]: 152/904 cut-off events. [2022-07-22 21:34:16,375 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:34:16,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 904 events. 152/904 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4125 event pairs, 23 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 613. Up to 80 conditions per place. [2022-07-22 21:34:16,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 229 transitions, 518 flow [2022-07-22 21:34:16,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 229 transitions, 518 flow [2022-07-22 21:34:16,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:16,395 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:16,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:16,399 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-07-22 21:34:16,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:16,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:16,399 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] [2022-07-22 21:34:16,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2058187582, now seen corresponding path program 1 times [2022-07-22 21:34:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:16,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876337010] [2022-07-22 21:34:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876337010] [2022-07-22 21:34:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876337010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:16,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:16,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427973020] [2022-07-22 21:34:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:16,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 229 [2022-07-22 21:34:16,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 229 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:16,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 229 [2022-07-22 21:34:16,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:16,513 INFO L129 PetriNetUnfolder]: 58/786 cut-off events. [2022-07-22 21:34:16,514 INFO L130 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-07-22 21:34:16,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 786 events. 58/786 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3699 event pairs, 23 based on Foata normal form. 884/1623 useless extension candidates. Maximal degree in co-relation 590. Up to 110 conditions per place. [2022-07-22 21:34:16,518 INFO L132 encePairwiseOnDemand]: 190/229 looper letters, 14 selfloop transitions, 2 changer transitions 24/196 dead transitions. [2022-07-22 21:34:16,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 196 transitions, 494 flow [2022-07-22 21:34:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-07-22 21:34:16,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.858806404657933 [2022-07-22 21:34:16,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-07-22 21:34:16,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-07-22 21:34:16,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:16,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-07-22 21:34:16,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,522 INFO L186 Difference]: Start difference. First operand has 198 places, 229 transitions, 518 flow. Second operand 3 states and 590 transitions. [2022-07-22 21:34:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 196 transitions, 494 flow [2022-07-22 21:34:16,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 196 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:16,525 INFO L242 Difference]: Finished difference. Result has 200 places, 169 transitions, 393 flow [2022-07-22 21:34:16,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2022-07-22 21:34:16,526 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, 2 predicate places. [2022-07-22 21:34:16,526 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 393 flow [2022-07-22 21:34:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:16,527 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] [2022-07-22 21:34:16,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:34:16,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -953336994, now seen corresponding path program 1 times [2022-07-22 21:34:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:16,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092718167] [2022-07-22 21:34:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092718167] [2022-07-22 21:34:16,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092718167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936926126] [2022-07-22 21:34:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:16,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:16,556 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) [2022-07-22 21:34:16,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:34:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:16,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936926126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:16,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:16,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:16,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254515379] [2022-07-22 21:34:16,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:16,672 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 229 [2022-07-22 21:34:16,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 393 flow. Second operand has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:16,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 229 [2022-07-22 21:34:16,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:16,737 INFO L129 PetriNetUnfolder]: 3/236 cut-off events. [2022-07-22 21:34:16,737 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-22 21:34:16,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 236 events. 3/236 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 523 event pairs, 0 based on Foata normal form. 2/235 useless extension candidates. Maximal degree in co-relation 258. Up to 15 conditions per place. [2022-07-22 21:34:16,738 INFO L132 encePairwiseOnDemand]: 223/229 looper letters, 15 selfloop transitions, 9 changer transitions 0/179 dead transitions. [2022-07-22 21:34:16,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 179 transitions, 463 flow [2022-07-22 21:34:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1592 transitions. [2022-07-22 21:34:16,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.772440562833576 [2022-07-22 21:34:16,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1592 transitions. [2022-07-22 21:34:16,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1592 transitions. [2022-07-22 21:34:16,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:16,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1592 transitions. [2022-07-22 21:34:16,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.88888888888889) internal successors, (1592), 9 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,747 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,747 INFO L186 Difference]: Start difference. First operand has 200 places, 169 transitions, 393 flow. Second operand 9 states and 1592 transitions. [2022-07-22 21:34:16,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 179 transitions, 463 flow [2022-07-22 21:34:16,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 179 transitions, 441 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:16,750 INFO L242 Difference]: Finished difference. Result has 191 places, 175 transitions, 421 flow [2022-07-22 21:34:16,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=421, PETRI_PLACES=191, PETRI_TRANSITIONS=175} [2022-07-22 21:34:16,750 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, -7 predicate places. [2022-07-22 21:34:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 175 transitions, 421 flow [2022-07-22 21:34:16,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:16,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:16,751 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] [2022-07-22 21:34:16,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:34:16,967 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,SelfDestructingSolverStorable15 [2022-07-22 21:34:16,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -474641827, now seen corresponding path program 1 times [2022-07-22 21:34:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519222539] [2022-07-22 21:34:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:34:17,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:17,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519222539] [2022-07-22 21:34:17,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519222539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:17,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:17,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:34:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826551107] [2022-07-22 21:34:17,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:17,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:34:17,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:34:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:34:17,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 229 [2022-07-22 21:34:17,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 175 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:17,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:17,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 229 [2022-07-22 21:34:17,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:43,064 INFO L129 PetriNetUnfolder]: 110562/245093 cut-off events. [2022-07-22 21:34:43,065 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-07-22 21:34:45,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389350 conditions, 245093 events. 110562/245093 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8979. Compared 3342821 event pairs, 76730 based on Foata normal form. 3875/246654 useless extension candidates. Maximal degree in co-relation 247817. Up to 88950 conditions per place. [2022-07-22 21:34:46,486 INFO L132 encePairwiseOnDemand]: 220/229 looper letters, 38 selfloop transitions, 6 changer transitions 65/254 dead transitions. [2022-07-22 21:34:46,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 254 transitions, 817 flow [2022-07-22 21:34:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:34:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:34:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1203 transitions. [2022-07-22 21:34:46,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7504678727386151 [2022-07-22 21:34:46,497 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1203 transitions. [2022-07-22 21:34:46,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1203 transitions. [2022-07-22 21:34:46,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:46,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1203 transitions. [2022-07-22 21:34:46,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.85714285714286) internal successors, (1203), 7 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:46,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:46,501 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:46,501 INFO L186 Difference]: Start difference. First operand has 191 places, 175 transitions, 421 flow. Second operand 7 states and 1203 transitions. [2022-07-22 21:34:46,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 254 transitions, 817 flow [2022-07-22 21:34:46,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 254 transitions, 811 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:46,508 INFO L242 Difference]: Finished difference. Result has 201 places, 180 transitions, 483 flow [2022-07-22 21:34:46,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=483, PETRI_PLACES=201, PETRI_TRANSITIONS=180} [2022-07-22 21:34:46,509 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, 3 predicate places. [2022-07-22 21:34:46,509 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 180 transitions, 483 flow [2022-07-22 21:34:46,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:46,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:46,510 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] [2022-07-22 21:34:46,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:34:46,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2002231987, now seen corresponding path program 1 times [2022-07-22 21:34:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261200673] [2022-07-22 21:34:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:46,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261200673] [2022-07-22 21:34:46,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261200673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982648171] [2022-07-22 21:34:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:46,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:46,584 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) [2022-07-22 21:34:46,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:34:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:46,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:46,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:46,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982648171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:46,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:46,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:46,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840696224] [2022-07-22 21:34:46,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:46,822 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 229 [2022-07-22 21:34:46,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 180 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 176.61111111111111) internal successors, (3179), 18 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:46,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:46,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 229 [2022-07-22 21:34:46,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:47,011 INFO L129 PetriNetUnfolder]: 49/633 cut-off events. [2022-07-22 21:34:47,011 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-22 21:34:47,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 633 events. 49/633 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3384 event pairs, 23 based on Foata normal form. 3/619 useless extension candidates. Maximal degree in co-relation 949. Up to 81 conditions per place. [2022-07-22 21:34:47,019 INFO L132 encePairwiseOnDemand]: 224/229 looper letters, 18 selfloop transitions, 16 changer transitions 0/181 dead transitions. [2022-07-22 21:34:47,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 181 transitions, 565 flow [2022-07-22 21:34:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:34:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:34:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3169 transitions. [2022-07-22 21:34:47,024 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7688015526443474 [2022-07-22 21:34:47,024 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3169 transitions. [2022-07-22 21:34:47,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3169 transitions. [2022-07-22 21:34:47,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:47,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3169 transitions. [2022-07-22 21:34:47,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 176.05555555555554) internal successors, (3169), 18 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,035 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,035 INFO L186 Difference]: Start difference. First operand has 201 places, 180 transitions, 483 flow. Second operand 18 states and 3169 transitions. [2022-07-22 21:34:47,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 181 transitions, 565 flow [2022-07-22 21:34:47,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 181 transitions, 528 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:47,039 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 464 flow [2022-07-22 21:34:47,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=464, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2022-07-22 21:34:47,039 INFO L279 CegarLoopForPetriNet]: 198 programPoint places, -3 predicate places. [2022-07-22 21:34:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 464 flow [2022-07-22 21:34:47,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.61111111111111) internal successors, (3179), 18 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:47,041 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] [2022-07-22 21:34:47,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:34:47,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash 884848529, now seen corresponding path program 1 times [2022-07-22 21:34:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:47,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868014149] [2022-07-22 21:34:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:47,277 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:47,299 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:47,301 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:47,301 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:47,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:34:47,302 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:34:47,302 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:47,302 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:34:47,320 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:34:47,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 259 transitions, 596 flow [2022-07-22 21:34:47,458 INFO L129 PetriNetUnfolder]: 277/1528 cut-off events. [2022-07-22 21:34:47,458 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-22 21:34:47,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1528 events. 277/1528 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8502 event pairs, 72 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 1003. Up to 192 conditions per place. [2022-07-22 21:34:47,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 259 transitions, 596 flow [2022-07-22 21:34:47,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 259 transitions, 596 flow [2022-07-22 21:34:47,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:47,492 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@678666d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76e9db96 [2022-07-22 21:34:47,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:47,495 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2022-07-22 21:34:47,495 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:47,495 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:47,495 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] [2022-07-22 21:34:47,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1701775362, now seen corresponding path program 1 times [2022-07-22 21:34:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601585499] [2022-07-22 21:34:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:47,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601585499] [2022-07-22 21:34:47,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601585499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:47,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:47,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889441290] [2022-07-22 21:34:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:47,506 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 259 [2022-07-22 21:34:47,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 205.0) internal successors, (410), 2 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:47,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 259 [2022-07-22 21:34:47,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:47,658 INFO L129 PetriNetUnfolder]: 142/1386 cut-off events. [2022-07-22 21:34:47,658 INFO L130 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-07-22 21:34:47,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1386 events. 142/1386 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8108 event pairs, 72 based on Foata normal form. 1321/2622 useless extension candidates. Maximal degree in co-relation 990. Up to 199 conditions per place. [2022-07-22 21:34:47,672 INFO L132 encePairwiseOnDemand]: 217/259 looper letters, 6 selfloop transitions, 0 changer transitions 25/216 dead transitions. [2022-07-22 21:34:47,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 216 transitions, 534 flow [2022-07-22 21:34:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 462 transitions. [2022-07-22 21:34:47,674 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8918918918918919 [2022-07-22 21:34:47,674 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 462 transitions. [2022-07-22 21:34:47,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 462 transitions. [2022-07-22 21:34:47,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:47,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 462 transitions. [2022-07-22 21:34:47,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.0) internal successors, (462), 2 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,676 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,676 INFO L186 Difference]: Start difference. First operand has 223 places, 259 transitions, 596 flow. Second operand 2 states and 462 transitions. [2022-07-22 21:34:47,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 216 transitions, 534 flow [2022-07-22 21:34:47,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 216 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:47,679 INFO L242 Difference]: Finished difference. Result has 223 places, 191 transitions, 442 flow [2022-07-22 21:34:47,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=442, PETRI_PLACES=223, PETRI_TRANSITIONS=191} [2022-07-22 21:34:47,679 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, 0 predicate places. [2022-07-22 21:34:47,679 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 191 transitions, 442 flow [2022-07-22 21:34:47,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 205.0) internal successors, (410), 2 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:47,680 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] [2022-07-22 21:34:47,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:34:47,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1061042512, now seen corresponding path program 1 times [2022-07-22 21:34:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:47,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508368235] [2022-07-22 21:34:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:47,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:47,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508368235] [2022-07-22 21:34:47,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508368235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:47,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:47,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279109744] [2022-07-22 21:34:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:47,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:47,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 259 [2022-07-22 21:34:47,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 191 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:47,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 259 [2022-07-22 21:34:47,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:47,733 INFO L129 PetriNetUnfolder]: 6/310 cut-off events. [2022-07-22 21:34:47,734 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:34:47,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 310 events. 6/310 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 836 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 383. Up to 36 conditions per place. [2022-07-22 21:34:47,736 INFO L132 encePairwiseOnDemand]: 256/259 looper letters, 15 selfloop transitions, 2 changer transitions 0/195 dead transitions. [2022-07-22 21:34:47,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 195 transitions, 484 flow [2022-07-22 21:34:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-07-22 21:34:47,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837837837837838 [2022-07-22 21:34:47,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-07-22 21:34:47,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-07-22 21:34:47,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:47,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-07-22 21:34:47,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,741 INFO L186 Difference]: Start difference. First operand has 223 places, 191 transitions, 442 flow. Second operand 3 states and 609 transitions. [2022-07-22 21:34:47,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 195 transitions, 484 flow [2022-07-22 21:34:47,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 195 transitions, 454 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:47,744 INFO L242 Difference]: Finished difference. Result has 207 places, 192 transitions, 424 flow [2022-07-22 21:34:47,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=207, PETRI_TRANSITIONS=192} [2022-07-22 21:34:47,745 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, -16 predicate places. [2022-07-22 21:34:47,745 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 192 transitions, 424 flow [2022-07-22 21:34:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:47,745 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] [2022-07-22 21:34:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:34:47,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -183362971, now seen corresponding path program 1 times [2022-07-22 21:34:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:47,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844453955] [2022-07-22 21:34:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:47,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:47,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844453955] [2022-07-22 21:34:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844453955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145785442] [2022-07-22 21:34:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:47,772 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) [2022-07-22 21:34:47,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:34:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:47,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:47,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145785442] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:47,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:47,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443048163] [2022-07-22 21:34:47,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:47,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 259 [2022-07-22 21:34:47,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 192 transitions, 424 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:47,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:47,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 259 [2022-07-22 21:34:47,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:48,116 INFO L129 PetriNetUnfolder]: 4/282 cut-off events. [2022-07-22 21:34:48,116 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:34:48,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 282 events. 4/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 682 event pairs, 0 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 356. Up to 19 conditions per place. [2022-07-22 21:34:48,118 INFO L132 encePairwiseOnDemand]: 253/259 looper letters, 16 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-07-22 21:34:48,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 202 transitions, 496 flow [2022-07-22 21:34:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1791 transitions. [2022-07-22 21:34:48,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7683397683397684 [2022-07-22 21:34:48,122 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1791 transitions. [2022-07-22 21:34:48,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1791 transitions. [2022-07-22 21:34:48,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:48,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1791 transitions. [2022-07-22 21:34:48,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:48,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:48,129 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:48,129 INFO L186 Difference]: Start difference. First operand has 207 places, 192 transitions, 424 flow. Second operand 9 states and 1791 transitions. [2022-07-22 21:34:48,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 202 transitions, 496 flow [2022-07-22 21:34:48,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 202 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:48,132 INFO L242 Difference]: Finished difference. Result has 217 places, 198 transitions, 472 flow [2022-07-22 21:34:48,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=472, PETRI_PLACES=217, PETRI_TRANSITIONS=198} [2022-07-22 21:34:48,132 INFO L279 CegarLoopForPetriNet]: 223 programPoint places, -6 predicate places. [2022-07-22 21:34:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 198 transitions, 472 flow [2022-07-22 21:34:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:48,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:48,133 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] [2022-07-22 21:34:48,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:48,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2006824300, now seen corresponding path program 1 times [2022-07-22 21:34:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:48,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891890288] [2022-07-22 21:34:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:34:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891890288] [2022-07-22 21:34:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891890288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:48,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:48,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:34:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060739779] [2022-07-22 21:34:48,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:34:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:34:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:34:48,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 259 [2022-07-22 21:34:48,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 198 transitions, 472 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:48,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:48,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 259 [2022-07-22 21:34:48,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand