./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.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 c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:59:03,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:59:03,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:59:03,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:59:03,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:59:03,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:59:03,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:59:03,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:59:03,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:59:03,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:59:03,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:59:03,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:59:03,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:59:03,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:59:03,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:59:03,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:59:03,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:59:03,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:59:03,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:59:03,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:59:03,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:59:03,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:59:03,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:59:03,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:59:03,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:59:03,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:59:03,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:59:03,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:59:03,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:59:03,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:59:03,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:59:03,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:59:03,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:59:03,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:59:03,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:59:03,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:59:03,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:59:03,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:59:03,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:59:03,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:59:03,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:59:03,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:59:03,179 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:59:03,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:59:03,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:59:03,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:59:03,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:59:03,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:59:03,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:59:03,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:59:03,182 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:59:03,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:59:03,182 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:59:03,183 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:59:03,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:59:03,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:59:03,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:59:03,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:59:03,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:59:03,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:59:03,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:59:03,185 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:59:03,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:59:03,186 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:59:03,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:59:03,186 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:59:03,186 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:59:03,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:59:03,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:59:03,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:59:03,436 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:59:03,436 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:59:03,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 22:59:04,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:59:04,477 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:59:04,477 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 22:59:04,493 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2df1a1d1c/e9030eb1b7bf41948456b17b71431068/FLAG031892a26 [2023-08-30 22:59:04,502 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2df1a1d1c/e9030eb1b7bf41948456b17b71431068 [2023-08-30 22:59:04,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:59:04,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:59:04,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:59:04,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:59:04,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:59:04,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f911fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04, skipping insertion in model container [2023-08-30 22:59:04,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:59:04,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:59:04,751 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-08-30 22:59:04,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:59:04,765 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:59:04,796 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-08-30 22:59:04,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:59:04,836 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:59:04,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04 WrapperNode [2023-08-30 22:59:04,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:59:04,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:59:04,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:59:04,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:59:04,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,878 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 61 [2023-08-30 22:59:04,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:59:04,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:59:04,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:59:04,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:59:04,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,891 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:59:04,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:59:04,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:59:04,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:59:04,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (1/1) ... [2023-08-30 22:59:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:59:04,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:59:04,912 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) [2023-08-30 22:59:04,922 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 [2023-08-30 22:59:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:59:04,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:59:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:59:04,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:59:04,939 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:59:05,033 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:59:05,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:59:05,148 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:59:05,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:59:05,169 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 22:59:05,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:59:05 BoogieIcfgContainer [2023-08-30 22:59:05,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:59:05,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:59:05,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:59:05,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:59:05,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:59:04" (1/3) ... [2023-08-30 22:59:05,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d09e2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:59:05, skipping insertion in model container [2023-08-30 22:59:05,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:04" (2/3) ... [2023-08-30 22:59:05,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d09e2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:59:05, skipping insertion in model container [2023-08-30 22:59:05,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:59:05" (3/3) ... [2023-08-30 22:59:05,176 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-08-30 22:59:05,181 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:59:05,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:59:05,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:59:05,187 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:59:05,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:05,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,291 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 22:59:05,291 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:05,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 22:59:05,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:05,320 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 22:59:05,343 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 22:59:05,343 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:05,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 22:59:05,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-08-30 22:59:06,764 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-08-30 22:59:06,765 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-08-30 22:59:06,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:06,778 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:06,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:59:06,779 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:06,780 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:06,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:06,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:06,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:59:06,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 8574729, now seen corresponding path program 1 times [2023-08-30 22:59:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722871041] [2023-08-30 22:59:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:06,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722871041] [2023-08-30 22:59:06,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722871041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:06,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:06,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236697778] [2023-08-30 22:59:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:06,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-08-30 22:59:06,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:06,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:06,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-08-30 22:59:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:06,949 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:59:06,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:06,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 22:59:06,951 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-30 22:59:06,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 22:59:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-08-30 22:59:06,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-08-30 22:59:06,961 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-08-30 22:59:06,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-08-30 22:59:06,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:06,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-08-30 22:59:06,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:06,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:06,971 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:06,972 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 101 transitions. [2023-08-30 22:59:06,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 22:59:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:06,975 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-30 22:59:06,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-30 22:59:06,978 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 22:59:06,979 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-30 22:59:06,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:06,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:06,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:59:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:59:06,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 22:59:06,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash -349651909, now seen corresponding path program 1 times [2023-08-30 22:59:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:06,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332549866] [2023-08-30 22:59:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:06,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:07,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:07,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:07,032 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:07,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:59:07,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:59:07,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:59:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:59:07,035 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:07,036 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:07,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:59:07,052 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:07,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,065 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 22:59:07,066 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:59:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 22:59:07,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:07,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 22:59:07,077 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 22:59:07,077 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:59:07,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 22:59:07,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-08-30 22:59:08,759 INFO L134 LiptonReduction]: Checked pairs total: 3080 [2023-08-30 22:59:08,760 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 22:59:08,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:08,762 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:08,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:59:08,763 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 22:59:08,763 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:08,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:08,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:08,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:59:08,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash 14664199, now seen corresponding path program 1 times [2023-08-30 22:59:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573080738] [2023-08-30 22:59:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:08,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573080738] [2023-08-30 22:59:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573080738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:08,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:08,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932959824] [2023-08-30 22:59:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:08,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:08,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 22:59:08,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 48 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:08,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:08,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 22:59:08,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:08,810 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-08-30 22:59:08,812 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 22:59:08,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-08-30 22:59:08,813 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-08-30 22:59:08,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2023-08-30 22:59:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2023-08-30 22:59:08,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2023-08-30 22:59:08,815 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2023-08-30 22:59:08,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2023-08-30 22:59:08,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:08,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2023-08-30 22:59:08,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:08,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:08,817 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:08,817 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 48 flow. Second operand 2 states and 157 transitions. [2023-08-30 22:59:08,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2023-08-30 22:59:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:08,818 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-08-30 22:59:08,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-08-30 22:59:08,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -4 predicate places. [2023-08-30 22:59:08,819 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-08-30 22:59:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:08,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:08,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:59:08,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:59:08,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 22:59:08,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1782016936, now seen corresponding path program 1 times [2023-08-30 22:59:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444881335] [2023-08-30 22:59:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:08,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:08,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:08,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:08,844 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:59:08,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:59:08,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:59:08,845 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:59:08,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:59:08,845 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:08,845 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:08,845 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:59:08,868 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:08,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,881 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 22:59:08,881 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:59:08,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 22:59:08,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:08,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 22:59:08,893 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 22:59:08,896 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:59:08,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 22:59:08,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-08-30 22:59:11,452 INFO L134 LiptonReduction]: Checked pairs total: 6877 [2023-08-30 22:59:11,452 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-30 22:59:11,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:11,455 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:11,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:59:11,456 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:11,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:11,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:11,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:11,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:59:11,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 22621949, now seen corresponding path program 1 times [2023-08-30 22:59:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234772545] [2023-08-30 22:59:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:11,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:11,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234772545] [2023-08-30 22:59:11,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234772545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:11,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:11,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686584711] [2023-08-30 22:59:11,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 237 [2023-08-30 22:59:11,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:11,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:11,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 237 [2023-08-30 22:59:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:11,501 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2023-08-30 22:59:11,502 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 22:59:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 896 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2023-08-30 22:59:11,503 INFO L137 encePairwiseOnDemand]: 233/237 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-08-30 22:59:11,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2023-08-30 22:59:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2023-08-30 22:59:11,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409282700421941 [2023-08-30 22:59:11,505 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 209 transitions. [2023-08-30 22:59:11,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 209 transitions. [2023-08-30 22:59:11,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:11,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 209 transitions. [2023-08-30 22:59:11,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:11,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:11,508 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:11,508 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 2 states and 209 transitions. [2023-08-30 22:59:11,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2023-08-30 22:59:11,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:11,509 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 43 flow [2023-08-30 22:59:11,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=43, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-08-30 22:59:11,509 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-08-30 22:59:11,510 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 43 flow [2023-08-30 22:59:11,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:11,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:11,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:59:11,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:59:11,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 22:59:11,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:11,511 INFO L85 PathProgramCache]: Analyzing trace with hash -629585071, now seen corresponding path program 1 times [2023-08-30 22:59:11,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:11,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418280441] [2023-08-30 22:59:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:11,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:11,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:11,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:11,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:59:11,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:59:11,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:59:11,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:59:11,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:59:11,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:59:11,532 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:11,532 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:11,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:59:11,545 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:11,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,574 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 22:59:11,575 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:59:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 22:59:11,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,578 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:11,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 22:59:11,596 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 22:59:11,597 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:59:11,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 22:59:11,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-08-30 22:59:14,434 INFO L134 LiptonReduction]: Checked pairs total: 12143 [2023-08-30 22:59:14,434 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-30 22:59:14,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:14,445 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:14,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:59:14,446 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:14,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:14,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:14,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:14,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:59:14,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 32740208, now seen corresponding path program 1 times [2023-08-30 22:59:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633064765] [2023-08-30 22:59:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:14,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:14,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633064765] [2023-08-30 22:59:14,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633064765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:14,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:14,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:14,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221109197] [2023-08-30 22:59:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:14,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-08-30 22:59:14,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:14,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:14,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-08-30 22:59:14,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:14,558 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2023-08-30 22:59:14,560 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-08-30 22:59:14,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2023-08-30 22:59:14,564 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-30 22:59:14,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2023-08-30 22:59:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 263 transitions. [2023-08-30 22:59:14,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43833333333333335 [2023-08-30 22:59:14,568 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 263 transitions. [2023-08-30 22:59:14,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 263 transitions. [2023-08-30 22:59:14,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:14,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 263 transitions. [2023-08-30 22:59:14,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:14,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:14,575 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:14,575 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 2 states and 263 transitions. [2023-08-30 22:59:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2023-08-30 22:59:14,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:14,578 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 54 flow [2023-08-30 22:59:14,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-30 22:59:14,579 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2023-08-30 22:59:14,580 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 54 flow [2023-08-30 22:59:14,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:14,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:14,580 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:59:14,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 22:59:14,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1365754883, now seen corresponding path program 1 times [2023-08-30 22:59:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053622829] [2023-08-30 22:59:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:14,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:14,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:14,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 22:59:14,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 22:59:14,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:59:14,634 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:14,634 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:14,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 22:59:14,653 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:14,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,677 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 22:59:14,677 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:59:14,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 22:59:14,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:14,680 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,680 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 22:59:14,696 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 22:59:14,696 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:59:14,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 22:59:14,706 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-08-30 22:59:18,431 INFO L134 LiptonReduction]: Checked pairs total: 21309 [2023-08-30 22:59:18,431 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-30 22:59:18,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:18,432 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:18,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 22:59:18,433 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:18,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:18,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:18,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:18,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 22:59:18,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 44772881, now seen corresponding path program 1 times [2023-08-30 22:59:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:18,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521218438] [2023-08-30 22:59:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:18,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521218438] [2023-08-30 22:59:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521218438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:18,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:18,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684011896] [2023-08-30 22:59:18,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:18,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:18,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2023-08-30 22:59:18,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 101 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:18,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:18,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2023-08-30 22:59:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:18,746 INFO L130 PetriNetUnfolder]: 1946/2997 cut-off events. [2023-08-30 22:59:18,747 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2023-08-30 22:59:18,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15433 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1924. Up to 2675 conditions per place. [2023-08-30 22:59:18,758 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-30 22:59:18,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 119 flow [2023-08-30 22:59:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-08-30 22:59:18,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2023-08-30 22:59:18,760 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-08-30 22:59:18,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-08-30 22:59:18,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:18,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-08-30 22:59:18,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:18,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:18,763 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:18,763 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 101 flow. Second operand 2 states and 318 transitions. [2023-08-30 22:59:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 119 flow [2023-08-30 22:59:18,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 99 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:18,767 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 65 flow [2023-08-30 22:59:18,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-30 22:59:18,768 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-30 22:59:18,768 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 65 flow [2023-08-30 22:59:18,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:18,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:18,769 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:18,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:59:18,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 22:59:18,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash -510641466, now seen corresponding path program 1 times [2023-08-30 22:59:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:18,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684849478] [2023-08-30 22:59:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:18,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:18,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:18,802 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:18,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 22:59:18,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 22:59:18,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 22:59:18,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 22:59:18,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 22:59:18,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 22:59:18,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 22:59:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:59:18,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:18,805 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:18,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 22:59:18,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,868 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 22:59:18,868 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 22:59:18,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 22:59:18,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:18,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 22:59:18,895 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 22:59:18,896 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 22:59:18,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 22:59:18,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-08-30 22:59:22,750 INFO L134 LiptonReduction]: Checked pairs total: 28756 [2023-08-30 22:59:22,750 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-30 22:59:22,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:22,752 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:22,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 22:59:22,753 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:22,753 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:22,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:22,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:22,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 22:59:22,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 58971922, now seen corresponding path program 1 times [2023-08-30 22:59:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:22,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320481183] [2023-08-30 22:59:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:22,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320481183] [2023-08-30 22:59:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320481183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813685024] [2023-08-30 22:59:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:22,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 425 [2023-08-30 22:59:22,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:22,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:22,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 425 [2023-08-30 22:59:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:23,600 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2023-08-30 22:59:23,601 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2023-08-30 22:59:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57298 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2023-08-30 22:59:23,647 INFO L137 encePairwiseOnDemand]: 415/425 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-08-30 22:59:23,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2023-08-30 22:59:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 374 transitions. [2023-08-30 22:59:23,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-08-30 22:59:23,649 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 374 transitions. [2023-08-30 22:59:23,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 374 transitions. [2023-08-30 22:59:23,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:23,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 374 transitions. [2023-08-30 22:59:23,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.0) internal successors, (374), 2 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:23,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:23,652 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:23,652 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 132 flow. Second operand 2 states and 374 transitions. [2023-08-30 22:59:23,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2023-08-30 22:59:23,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:23,658 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 76 flow [2023-08-30 22:59:23,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-30 22:59:23,659 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -9 predicate places. [2023-08-30 22:59:23,659 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 76 flow [2023-08-30 22:59:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:23,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:23,659 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 22:59:23,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 22:59:23,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 304781237, now seen corresponding path program 1 times [2023-08-30 22:59:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747032905] [2023-08-30 22:59:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:23,675 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:23,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:23,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 22:59:23,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 22:59:23,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 22:59:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 22:59:23,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:23,693 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:23,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 22:59:23,713 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:23,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,741 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 22:59:23,742 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 22:59:23,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 22:59:23,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:23,746 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 22:59:23,794 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 22:59:23,794 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 22:59:23,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 22:59:23,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-08-30 22:59:28,774 INFO L134 LiptonReduction]: Checked pairs total: 41157 [2023-08-30 22:59:28,774 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-08-30 22:59:28,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:28,775 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:28,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 22:59:28,776 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:28,777 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:28,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:28,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:28,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 22:59:28,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash 74922768, now seen corresponding path program 1 times [2023-08-30 22:59:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:28,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095101109] [2023-08-30 22:59:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:28,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:28,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095101109] [2023-08-30 22:59:28,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095101109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:28,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:28,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897412834] [2023-08-30 22:59:28,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:28,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 499 [2023-08-30 22:59:28,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 153 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:28,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:28,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 499 [2023-08-30 22:59:28,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:31,598 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2023-08-30 22:59:31,598 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2023-08-30 22:59:31,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205736 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2023-08-30 22:59:31,795 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-30 22:59:31,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2023-08-30 22:59:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2023-08-30 22:59:31,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278557114228457 [2023-08-30 22:59:31,797 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2023-08-30 22:59:31,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2023-08-30 22:59:31,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:31,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2023-08-30 22:59:31,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:31,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:31,801 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:31,801 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 153 flow. Second operand 2 states and 427 transitions. [2023-08-30 22:59:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2023-08-30 22:59:31,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:31,841 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 87 flow [2023-08-30 22:59:31,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-08-30 22:59:31,842 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2023-08-30 22:59:31,842 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 87 flow [2023-08-30 22:59:31,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:31,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:31,842 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 22:59:31,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 22:59:31,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash -282970458, now seen corresponding path program 1 times [2023-08-30 22:59:31,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:31,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426451433] [2023-08-30 22:59:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:31,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:31,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:31,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:31,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 22:59:31,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 22:59:31,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 22:59:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 22:59:31,876 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:31,876 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:31,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-30 22:59:31,900 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:31,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,943 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 22:59:31,943 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 22:59:31,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 22:59:31,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:31,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 22:59:31,986 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 22:59:31,987 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 22:59:31,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 22:59:32,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-08-30 22:59:37,064 INFO L134 LiptonReduction]: Checked pairs total: 55579 [2023-08-30 22:59:37,064 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-30 22:59:37,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:37,065 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:37,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 22:59:37,066 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-30 22:59:37,066 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:37,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:37,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:37,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 22:59:37,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash 92945950, now seen corresponding path program 1 times [2023-08-30 22:59:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:37,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503048943] [2023-08-30 22:59:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503048943] [2023-08-30 22:59:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503048943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:37,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:37,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437011299] [2023-08-30 22:59:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:37,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 561 [2023-08-30 22:59:37,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:37,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:37,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 561 [2023-08-30 22:59:37,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:46,773 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2023-08-30 22:59:46,773 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2023-08-30 22:59:47,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716509 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2023-08-30 22:59:47,589 INFO L137 encePairwiseOnDemand]: 550/561 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-30 22:59:47,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2023-08-30 22:59:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 22:59:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 22:59:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-08-30 22:59:47,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698752228164 [2023-08-30 22:59:47,590 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-08-30 22:59:47,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-08-30 22:59:47,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:47,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-08-30 22:59:47,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:47,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:47,594 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:47,594 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 180 flow. Second operand 2 states and 481 transitions. [2023-08-30 22:59:47,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2023-08-30 22:59:47,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:47,790 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 98 flow [2023-08-30 22:59:47,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2023-08-30 22:59:47,791 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 22:59:47,791 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 98 flow [2023-08-30 22:59:47,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:47,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:47,791 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:47,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 22:59:47,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 22:59:47,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1099616246, now seen corresponding path program 1 times [2023-08-30 22:59:47,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880365921] [2023-08-30 22:59:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:47,802 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:47,810 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:47,810 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:47,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 22:59:47,810 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-08-30 22:59:47,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-08-30 22:59:47,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 22:59:47,812 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:47,812 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:47,812 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-30 22:59:47,832 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:47,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,870 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 22:59:47,870 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 22:59:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 22:59:47,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:47,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 22:59:47,915 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 22:59:47,915 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 22:59:47,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 22:59:47,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-08-30 22:59:53,593 INFO L134 LiptonReduction]: Checked pairs total: 68030 [2023-08-30 22:59:53,593 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-08-30 22:59:53,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:53,597 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:53,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 22:59:53,597 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 22:59:53,597 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:53,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:53,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 22:59:53,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 22:59:53,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash 113036301, now seen corresponding path program 1 times [2023-08-30 22:59:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022226447] [2023-08-30 22:59:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:53,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022226447] [2023-08-30 22:59:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022226447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:53,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:53,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:53,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450737125] [2023-08-30 22:59:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:53,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 22:59:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 22:59:53,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 22:59:53,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 623 [2023-08-30 22:59:53,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 209 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:59:53,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:53,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 623 [2023-08-30 22:59:53,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:00:27,468 INFO L130 PetriNetUnfolder]: 314930/400221 cut-off events. [2023-08-30 23:00:27,468 INFO L131 PetriNetUnfolder]: For 609352/609352 co-relation queries the response was YES. [2023-08-30 23:00:28,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926753 conditions, 400221 events. 314930/400221 cut-off events. For 609352/609352 co-relation queries the response was YES. Maximal size of possible extension queue 11911. Compared 2455429 event pairs, 314930 based on Foata normal form. 0/390380 useless extension candidates. Maximal degree in co-relation 282670. Up to 373979 conditions per place. [2023-08-30 23:00:29,799 INFO L137 encePairwiseOnDemand]: 611/623 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-30 23:00:29,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 32 transitions, 239 flow [2023-08-30 23:00:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 23:00:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 23:00:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 535 transitions. [2023-08-30 23:00:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42937399678972715 [2023-08-30 23:00:29,801 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 535 transitions. [2023-08-30 23:00:29,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 535 transitions. [2023-08-30 23:00:29,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:00:29,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 535 transitions. [2023-08-30 23:00:29,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.5) internal successors, (535), 2 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:29,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:29,804 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:29,804 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 209 flow. Second operand 2 states and 535 transitions. [2023-08-30 23:00:29,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 32 transitions, 239 flow [2023-08-30 23:00:30,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 167 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 23:00:30,801 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 109 flow [2023-08-30 23:00:30,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=109, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-08-30 23:00:30,801 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-08-30 23:00:30,801 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 109 flow [2023-08-30 23:00:30,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:30,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:30,802 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:00:30,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 23:00:30,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-08-30 23:00:30,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:30,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2089114799, now seen corresponding path program 1 times [2023-08-30 23:00:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040858511] [2023-08-30 23:00:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:00:30,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:00:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:00:30,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:00:30,838 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:00:30,838 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2023-08-30 23:00:30,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2023-08-30 23:00:30,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2023-08-30 23:00:30,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2023-08-30 23:00:30,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2023-08-30 23:00:30,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 23:00:30,840 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:00:30,840 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:00:30,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-30 23:00:30,869 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:00:30,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,924 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-08-30 23:00:30,924 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 23:00:30,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-08-30 23:00:30,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:00:30,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 23:00:30,984 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-08-30 23:00:30,984 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 23:00:30,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-08-30 23:00:31,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 85840 [2023-08-30 23:00:37,128 INFO L134 LiptonReduction]: Checked pairs total: 83168 [2023-08-30 23:00:37,129 INFO L136 LiptonReduction]: Total number of compositions: 362 [2023-08-30 23:00:37,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:00:37,130 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121005c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:00:37,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 23:00:37,131 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 23:00:37,131 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:00:37,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:37,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:00:37,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-08-30 23:00:37,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 135189984, now seen corresponding path program 1 times [2023-08-30 23:00:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:37,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273524885] [2023-08-30 23:00:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:00:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:37,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:00:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273524885] [2023-08-30 23:00:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273524885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:00:37,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:00:37,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:00:37,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924493301] [2023-08-30 23:00:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:00:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:00:37,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:00:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:00:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:00:37,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 686 [2023-08-30 23:00:37,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:00:37,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:00:37,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 686 [2023-08-30 23:00:37,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand