./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:32:26,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:32:26,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:32:26,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:32:26,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:32:26,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:32:26,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:32:26,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:32:26,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:32:26,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:32:26,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:32:26,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:32:26,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:32:26,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:32:26,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:32:26,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:32:26,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:32:26,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:32:26,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:32:26,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:32:26,968 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:32:26,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:32:26,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:32:26,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:32:26,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:32:26,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:32:26,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:32:26,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:32:26,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:32:26,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:32:26,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:32:26,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:32:26,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:32:26,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:32:26,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:32:26,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:32:26,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:32:26,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:32:26,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:32:26,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:32:26,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:32:26,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:32:26,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:32:27,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:32:27,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:32:27,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:32:27,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:32:27,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:32:27,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:32:27,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:32:27,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:32:27,017 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:32:27,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:32:27,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:32:27,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:32:27,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:32:27,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:32:27,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:32:27,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:32:27,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:32:27,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:32:27,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:32:27,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:32:27,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:32:27,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:32:27,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2022-07-22 21:32:27,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:32:27,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:32:27,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:32:27,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:32:27,231 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:32:27,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-07-22 21:32:27,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756588af2/33a5c0d328054c4d8800e8c15034f2d0/FLAG39bfca041 [2022-07-22 21:32:27,696 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:32:27,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-07-22 21:32:27,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756588af2/33a5c0d328054c4d8800e8c15034f2d0/FLAG39bfca041 [2022-07-22 21:32:27,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756588af2/33a5c0d328054c4d8800e8c15034f2d0 [2022-07-22 21:32:27,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:32:27,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:32:27,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:32:27,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:32:27,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:32:27,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:32:27" (1/1) ... [2022-07-22 21:32:27,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af5ba34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:27, skipping insertion in model container [2022-07-22 21:32:27,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:32:27" (1/1) ... [2022-07-22 21:32:27,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:32:27,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:32:28,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-07-22 21:32:28,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:32:28,122 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:32:28,150 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-07-22 21:32:28,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:32:28,211 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:32:28,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28 WrapperNode [2022-07-22 21:32:28,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:32:28,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:32:28,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:32:28,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:32:28,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,268 INFO L137 Inliner]: procedures = 270, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-07-22 21:32:28,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:32:28,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:32:28,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:32:28,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:32:28,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:32:28,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:32:28,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:32:28,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:32:28,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (1/1) ... [2022-07-22 21:32:28,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:32:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:28,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:32:28,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:32:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:32:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:32:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:32:28,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:32:28,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:32:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:32:28,379 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:32:28,481 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:32:28,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:32:28,663 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:32:28,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:32:28,669 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 21:32:28,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:32:28 BoogieIcfgContainer [2022-07-22 21:32:28,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:32:28,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:32:28,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:32:28,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:32:28,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:32:27" (1/3) ... [2022-07-22 21:32:28,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482bdaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:32:28, skipping insertion in model container [2022-07-22 21:32:28,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:32:28" (2/3) ... [2022-07-22 21:32:28,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482bdaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:32:28, skipping insertion in model container [2022-07-22 21:32:28,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:32:28" (3/3) ... [2022-07-22 21:32:28,677 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2022-07-22 21:32:28,681 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:32:28,687 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:32:28,687 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:32:28,688 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:32:28,719 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:32:28,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2022-07-22 21:32:28,825 INFO L129 PetriNetUnfolder]: 23/172 cut-off events. [2022-07-22 21:32:28,825 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:32:28,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 172 events. 23/172 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 385 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2022-07-22 21:32:28,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 127 transitions, 262 flow [2022-07-22 21:32:28,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 122 transitions, 249 flow [2022-07-22 21:32:28,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:32:28,854 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:32:28,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:32:28,887 INFO L129 PetriNetUnfolder]: 8/107 cut-off events. [2022-07-22 21:32:28,887 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:28,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:28,889 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:28,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1000137301, now seen corresponding path program 1 times [2022-07-22 21:32:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:28,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234272319] [2022-07-22 21:32:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:28,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:29,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:29,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234272319] [2022-07-22 21:32:29,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234272319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:29,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:29,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:32:29,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129000339] [2022-07-22 21:32:29,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:29,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:32:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:32:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:32:29,094 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 127 [2022-07-22 21:32:29,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 249 flow. Second operand has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:29,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 127 [2022-07-22 21:32:29,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:29,133 INFO L129 PetriNetUnfolder]: 6/149 cut-off events. [2022-07-22 21:32:29,133 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:32:29,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 149 events. 6/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 316 event pairs, 0 based on Foata normal form. 16/153 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-22 21:32:29,134 INFO L132 encePairwiseOnDemand]: 116/127 looper letters, 1 selfloop transitions, 0 changer transitions 19/110 dead transitions. [2022-07-22 21:32:29,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 227 flow [2022-07-22 21:32:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:32:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:32:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-07-22 21:32:29,146 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.937007874015748 [2022-07-22 21:32:29,146 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-07-22 21:32:29,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-07-22 21:32:29,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:29,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-07-22 21:32:29,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,158 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,159 INFO L186 Difference]: Start difference. First operand has 111 places, 122 transitions, 249 flow. Second operand 2 states and 238 transitions. [2022-07-22 21:32:29,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 227 flow [2022-07-22 21:32:29,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 110 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:29,170 INFO L242 Difference]: Finished difference. Result has 111 places, 91 transitions, 187 flow [2022-07-22 21:32:29,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=187, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2022-07-22 21:32:29,175 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 0 predicate places. [2022-07-22 21:32:29,175 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 187 flow [2022-07-22 21:32:29,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,176 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:32:29,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash 706734294, now seen corresponding path program 1 times [2022-07-22 21:32:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:29,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111547676] [2022-07-22 21:32:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:29,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:29,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111547676] [2022-07-22 21:32:29,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111547676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:29,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:32:29,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779447114] [2022-07-22 21:32:29,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:29,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:29,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:32:29,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 127 [2022-07-22 21:32:29,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:29,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 127 [2022-07-22 21:32:29,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:29,259 INFO L129 PetriNetUnfolder]: 1/95 cut-off events. [2022-07-22 21:32:29,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:29,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 95 events. 1/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2022-07-22 21:32:29,260 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2022-07-22 21:32:29,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 211 flow [2022-07-22 21:32:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-07-22 21:32:29,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863517060367454 [2022-07-22 21:32:29,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-07-22 21:32:29,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-07-22 21:32:29,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:29,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-07-22 21:32:29,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,268 INFO L186 Difference]: Start difference. First operand has 111 places, 91 transitions, 187 flow. Second operand 3 states and 329 transitions. [2022-07-22 21:32:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 211 flow [2022-07-22 21:32:29,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:29,270 INFO L242 Difference]: Finished difference. Result has 97 places, 91 transitions, 195 flow [2022-07-22 21:32:29,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2022-07-22 21:32:29,271 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -14 predicate places. [2022-07-22 21:32:29,271 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 195 flow [2022-07-22 21:32:29,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,272 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:32:29,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1070178912, now seen corresponding path program 1 times [2022-07-22 21:32:29,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:29,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701493197] [2022-07-22 21:32:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:29,299 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:32:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:29,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:32:29,358 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:32:29,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:32:29,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:32:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:32:29,361 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:32:29,364 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:32:29,364 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:32:29,389 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:32:29,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2022-07-22 21:32:29,409 INFO L129 PetriNetUnfolder]: 40/272 cut-off events. [2022-07-22 21:32:29,409 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:32:29,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 272 events. 40/272 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 771 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 174. Up to 9 conditions per place. [2022-07-22 21:32:29,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 157 transitions, 332 flow [2022-07-22 21:32:29,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 157 transitions, 332 flow [2022-07-22 21:32:29,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:32:29,414 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:32:29,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:32:29,419 INFO L129 PetriNetUnfolder]: 8/108 cut-off events. [2022-07-22 21:32:29,419 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:29,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,419 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -38755054, now seen corresponding path program 1 times [2022-07-22 21:32:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:29,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841807994] [2022-07-22 21:32:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:29,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841807994] [2022-07-22 21:32:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841807994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:29,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:32:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105593251] [2022-07-22 21:32:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:32:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:32:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:32:29,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 157 [2022-07-22 21:32:29,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 157 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:29,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 157 [2022-07-22 21:32:29,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:29,492 INFO L129 PetriNetUnfolder]: 12/241 cut-off events. [2022-07-22 21:32:29,492 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-22 21:32:29,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 241 events. 12/241 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 670 event pairs, 0 based on Foata normal form. 42/264 useless extension candidates. Maximal degree in co-relation 158. Up to 7 conditions per place. [2022-07-22 21:32:29,494 INFO L132 encePairwiseOnDemand]: 140/157 looper letters, 2 selfloop transitions, 0 changer transitions 25/139 dead transitions. [2022-07-22 21:32:29,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 139 transitions, 304 flow [2022-07-22 21:32:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:32:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:32:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-07-22 21:32:29,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9267515923566879 [2022-07-22 21:32:29,497 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-07-22 21:32:29,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-07-22 21:32:29,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:29,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-07-22 21:32:29,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,499 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,499 INFO L186 Difference]: Start difference. First operand has 140 places, 157 transitions, 332 flow. Second operand 2 states and 291 transitions. [2022-07-22 21:32:29,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 139 transitions, 304 flow [2022-07-22 21:32:29,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:29,502 INFO L242 Difference]: Finished difference. Result has 140 places, 114 transitions, 240 flow [2022-07-22 21:32:29,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=240, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2022-07-22 21:32:29,503 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2022-07-22 21:32:29,503 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 240 flow [2022-07-22 21:32:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,504 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:32:29,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash -332158061, now seen corresponding path program 1 times [2022-07-22 21:32:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737899551] [2022-07-22 21:32:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:29,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:29,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737899551] [2022-07-22 21:32:29,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737899551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:29,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:29,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:32:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193851330] [2022-07-22 21:32:29,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:29,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:32:29,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 157 [2022-07-22 21:32:29,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:29,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 157 [2022-07-22 21:32:29,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:29,607 INFO L129 PetriNetUnfolder]: 2/143 cut-off events. [2022-07-22 21:32:29,612 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:32:29,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 143 events. 2/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 232 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2022-07-22 21:32:29,613 INFO L132 encePairwiseOnDemand]: 154/157 looper letters, 11 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-07-22 21:32:29,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 274 flow [2022-07-22 21:32:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-07-22 21:32:29,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8450106157112527 [2022-07-22 21:32:29,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-07-22 21:32:29,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-07-22 21:32:29,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:29,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-07-22 21:32:29,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 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) [2022-07-22 21:32:29,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,619 INFO L186 Difference]: Start difference. First operand has 140 places, 114 transitions, 240 flow. Second operand 3 states and 398 transitions. [2022-07-22 21:32:29,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 274 flow [2022-07-22 21:32:29,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 118 transitions, 272 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:29,622 INFO L242 Difference]: Finished difference. Result has 122 places, 115 transitions, 250 flow [2022-07-22 21:32:29,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=122, PETRI_TRANSITIONS=115} [2022-07-22 21:32:29,623 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -18 predicate places. [2022-07-22 21:32:29,624 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 115 transitions, 250 flow [2022-07-22 21:32:29,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,625 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,625 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:32:29,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2039958608, now seen corresponding path program 1 times [2022-07-22 21:32:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:29,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774793676] [2022-07-22 21:32:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774793676] [2022-07-22 21:32:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774793676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525562864] [2022-07-22 21:32:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:29,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:29,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:32:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:29,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:32:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:32:29,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:32:29,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525562864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:29,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:32:29,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:32:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954824094] [2022-07-22 21:32:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:32:29,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 157 [2022-07-22 21:32:29,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 115 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:29,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 157 [2022-07-22 21:32:29,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:29,823 INFO L129 PetriNetUnfolder]: 0/145 cut-off events. [2022-07-22 21:32:29,823 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:32:29,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 0/145 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 249 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-22 21:32:29,824 INFO L132 encePairwiseOnDemand]: 155/157 looper letters, 6 selfloop transitions, 0 changer transitions 1/115 dead transitions. [2022-07-22 21:32:29,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 115 transitions, 264 flow [2022-07-22 21:32:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-07-22 21:32:29,825 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259023354564756 [2022-07-22 21:32:29,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-07-22 21:32:29,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-07-22 21:32:29,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:29,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-07-22 21:32:29,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,828 INFO L186 Difference]: Start difference. First operand has 122 places, 115 transitions, 250 flow. Second operand 3 states and 389 transitions. [2022-07-22 21:32:29,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 115 transitions, 264 flow [2022-07-22 21:32:29,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 115 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:29,830 INFO L242 Difference]: Finished difference. Result has 124 places, 114 transitions, 248 flow [2022-07-22 21:32:29,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2022-07-22 21:32:29,831 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -16 predicate places. [2022-07-22 21:32:29,831 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 248 flow [2022-07-22 21:32:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:29,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:29,835 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:29,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:30,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:32:30,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash -313844173, now seen corresponding path program 1 times [2022-07-22 21:32:30,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:30,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563132852] [2022-07-22 21:32:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:30,079 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:32:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:30,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:32:30,108 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:32:30,108 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:32:30,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:32:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:32:30,109 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:32:30,109 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:32:30,109 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:32:30,123 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:32:30,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2022-07-22 21:32:30,175 INFO L129 PetriNetUnfolder]: 62/405 cut-off events. [2022-07-22 21:32:30,177 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:32:30,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 405 events. 62/405 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1331 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 280. Up to 16 conditions per place. [2022-07-22 21:32:30,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 187 transitions, 404 flow [2022-07-22 21:32:30,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 187 transitions, 404 flow [2022-07-22 21:32:30,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:32:30,188 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:32:30,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:32:30,198 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-22 21:32:30,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:30,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:30,202 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:30,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1350713042, now seen corresponding path program 1 times [2022-07-22 21:32:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:30,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779617296] [2022-07-22 21:32:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779617296] [2022-07-22 21:32:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779617296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:30,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:32:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091753386] [2022-07-22 21:32:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:32:30,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 187 [2022-07-22 21:32:30,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 187 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:30,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 187 [2022-07-22 21:32:30,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:30,317 INFO L129 PetriNetUnfolder]: 16/333 cut-off events. [2022-07-22 21:32:30,318 INFO L130 PetriNetUnfolder]: For 73/157 co-relation queries the response was YES. [2022-07-22 21:32:30,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 333 events. 16/333 cut-off events. For 73/157 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1078 event pairs, 1 based on Foata normal form. 201/511 useless extension candidates. Maximal degree in co-relation 243. Up to 30 conditions per place. [2022-07-22 21:32:30,320 INFO L132 encePairwiseOnDemand]: 161/187 looper letters, 12 selfloop transitions, 2 changer transitions 26/167 dead transitions. [2022-07-22 21:32:30,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 167 transitions, 398 flow [2022-07-22 21:32:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-07-22 21:32:30,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8877005347593583 [2022-07-22 21:32:30,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-07-22 21:32:30,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-07-22 21:32:30,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:30,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-07-22 21:32:30,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 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) [2022-07-22 21:32:30,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,327 INFO L186 Difference]: Start difference. First operand has 165 places, 187 transitions, 404 flow. Second operand 3 states and 498 transitions. [2022-07-22 21:32:30,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 167 transitions, 398 flow [2022-07-22 21:32:30,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 167 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:30,330 INFO L242 Difference]: Finished difference. Result has 167 places, 138 transitions, 307 flow [2022-07-22 21:32:30,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=167, PETRI_TRANSITIONS=138} [2022-07-22 21:32:30,332 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-07-22 21:32:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 138 transitions, 307 flow [2022-07-22 21:32:30,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:30,333 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:30,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:32:30,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash 523178535, now seen corresponding path program 1 times [2022-07-22 21:32:30,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945099715] [2022-07-22 21:32:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:30,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945099715] [2022-07-22 21:32:30,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945099715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021898056] [2022-07-22 21:32:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:30,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:30,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:30,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:32:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:32:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:32:30,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:32:30,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021898056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:30,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:32:30,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:32:30,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686350051] [2022-07-22 21:32:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:32:30,486 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 187 [2022-07-22 21:32:30,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 138 transitions, 307 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:30,486 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 187 [2022-07-22 21:32:30,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:30,515 INFO L129 PetriNetUnfolder]: 0/194 cut-off events. [2022-07-22 21:32:30,515 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-22 21:32:30,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 194 events. 0/194 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-22 21:32:30,516 INFO L132 encePairwiseOnDemand]: 185/187 looper letters, 7 selfloop transitions, 0 changer transitions 1/138 dead transitions. [2022-07-22 21:32:30,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 138 transitions, 323 flow [2022-07-22 21:32:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2022-07-22 21:32:30,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8128342245989305 [2022-07-22 21:32:30,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2022-07-22 21:32:30,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2022-07-22 21:32:30,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:30,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2022-07-22 21:32:30,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,521 INFO L186 Difference]: Start difference. First operand has 167 places, 138 transitions, 307 flow. Second operand 3 states and 456 transitions. [2022-07-22 21:32:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 138 transitions, 323 flow [2022-07-22 21:32:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 138 transitions, 315 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:30,524 INFO L242 Difference]: Finished difference. Result has 148 places, 137 transitions, 299 flow [2022-07-22 21:32:30,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2022-07-22 21:32:30,525 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -17 predicate places. [2022-07-22 21:32:30,525 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 299 flow [2022-07-22 21:32:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:30,526 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:30,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 21:32:30,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -878662958, now seen corresponding path program 1 times [2022-07-22 21:32:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958439314] [2022-07-22 21:32:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:30,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:30,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958439314] [2022-07-22 21:32:30,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958439314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:30,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985013023] [2022-07-22 21:32:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:30,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:30,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:32:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:32:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:30,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:32:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:30,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985013023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:32:30,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:32:30,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:32:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069911893] [2022-07-22 21:32:30,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:32:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:32:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:32:30,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:32:30,968 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 187 [2022-07-22 21:32:30,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 151.3) internal successors, (1513), 10 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:30,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:30,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 187 [2022-07-22 21:32:30,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:31,038 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2022-07-22 21:32:31,039 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:32:31,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 158 events. 0/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 211 event pairs, 0 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:32:31,039 INFO L132 encePairwiseOnDemand]: 181/187 looper letters, 13 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2022-07-22 21:32:31,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 365 flow [2022-07-22 21:32:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:32:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:32:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-07-22 21:32:31,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8110516934046346 [2022-07-22 21:32:31,042 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-07-22 21:32:31,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-07-22 21:32:31,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:31,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-07-22 21:32:31,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,048 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,048 INFO L186 Difference]: Start difference. First operand has 148 places, 137 transitions, 299 flow. Second operand 9 states and 1365 transitions. [2022-07-22 21:32:31,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 365 flow [2022-07-22 21:32:31,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 363 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:31,050 INFO L242 Difference]: Finished difference. Result has 157 places, 143 transitions, 347 flow [2022-07-22 21:32:31,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=347, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2022-07-22 21:32:31,053 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -8 predicate places. [2022-07-22 21:32:31,053 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 347 flow [2022-07-22 21:32:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.3) internal successors, (1513), 10 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:31,054 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:31,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:31,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -734741859, now seen corresponding path program 1 times [2022-07-22 21:32:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156799768] [2022-07-22 21:32:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:31,291 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:32:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:31,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:32:31,324 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:32:31,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:32:31,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:32:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:32:31,325 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:32:31,326 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:32:31,326 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:32:31,349 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:32:31,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2022-07-22 21:32:31,401 INFO L129 PetriNetUnfolder]: 96/606 cut-off events. [2022-07-22 21:32:31,401 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:32:31,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 606 events. 96/606 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2290 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 425. Up to 32 conditions per place. [2022-07-22 21:32:31,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 478 flow [2022-07-22 21:32:31,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 478 flow [2022-07-22 21:32:31,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:32:31,414 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:32:31,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:32:31,426 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-22 21:32:31,426 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:31,426 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:31,427 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:31,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1946036647, now seen corresponding path program 1 times [2022-07-22 21:32:31,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:31,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864313517] [2022-07-22 21:32:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:31,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:31,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864313517] [2022-07-22 21:32:31,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864313517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:31,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:31,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:32:31,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981100237] [2022-07-22 21:32:31,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:31,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:31,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:32:31,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 217 [2022-07-22 21:32:31,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 217 transitions, 478 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:31,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 217 [2022-07-22 21:32:31,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:31,528 INFO L129 PetriNetUnfolder]: 32/515 cut-off events. [2022-07-22 21:32:31,528 INFO L130 PetriNetUnfolder]: For 154/276 co-relation queries the response was YES. [2022-07-22 21:32:31,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 515 events. 32/515 cut-off events. For 154/276 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2056 event pairs, 6 based on Foata normal form. 435/914 useless extension candidates. Maximal degree in co-relation 387. Up to 56 conditions per place. [2022-07-22 21:32:31,532 INFO L132 encePairwiseOnDemand]: 185/217 looper letters, 13 selfloop transitions, 2 changer transitions 27/191 dead transitions. [2022-07-22 21:32:31,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 191 transitions, 464 flow [2022-07-22 21:32:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-07-22 21:32:31,534 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8786482334869432 [2022-07-22 21:32:31,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-07-22 21:32:31,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-07-22 21:32:31,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:31,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-07-22 21:32:31,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,537 INFO L186 Difference]: Start difference. First operand has 190 places, 217 transitions, 478 flow. Second operand 3 states and 572 transitions. [2022-07-22 21:32:31,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 191 transitions, 464 flow [2022-07-22 21:32:31,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 191 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:31,541 INFO L242 Difference]: Finished difference. Result has 192 places, 161 transitions, 364 flow [2022-07-22 21:32:31,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=192, PETRI_TRANSITIONS=161} [2022-07-22 21:32:31,543 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, 2 predicate places. [2022-07-22 21:32:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 161 transitions, 364 flow [2022-07-22 21:32:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:31,543 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:31,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:32:31,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash 787898396, now seen corresponding path program 1 times [2022-07-22 21:32:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301215931] [2022-07-22 21:32:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:31,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301215931] [2022-07-22 21:32:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301215931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749496677] [2022-07-22 21:32:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:31,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:31,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:32:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:32:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:32:31,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:32:31,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749496677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:31,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:32:31,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:32:31,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742750739] [2022-07-22 21:32:31,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:31,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:31,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:31,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:32:31,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 217 [2022-07-22 21:32:31,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 161 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:31,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 217 [2022-07-22 21:32:31,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:31,700 INFO L129 PetriNetUnfolder]: 0/243 cut-off events. [2022-07-22 21:32:31,701 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-22 21:32:31,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 243 events. 0/243 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 621 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:32:31,702 INFO L132 encePairwiseOnDemand]: 215/217 looper letters, 8 selfloop transitions, 0 changer transitions 1/161 dead transitions. [2022-07-22 21:32:31,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 382 flow [2022-07-22 21:32:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2022-07-22 21:32:31,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8033794162826421 [2022-07-22 21:32:31,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2022-07-22 21:32:31,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2022-07-22 21:32:31,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:31,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2022-07-22 21:32:31,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,707 INFO L186 Difference]: Start difference. First operand has 192 places, 161 transitions, 364 flow. Second operand 3 states and 523 transitions. [2022-07-22 21:32:31,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 382 flow [2022-07-22 21:32:31,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 161 transitions, 368 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:31,709 INFO L242 Difference]: Finished difference. Result has 173 places, 160 transitions, 350 flow [2022-07-22 21:32:31,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=173, PETRI_TRANSITIONS=160} [2022-07-22 21:32:31,711 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -17 predicate places. [2022-07-22 21:32:31,711 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 160 transitions, 350 flow [2022-07-22 21:32:31,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:31,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:31,711 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:31,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:31,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:31,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 114059943, now seen corresponding path program 1 times [2022-07-22 21:32:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:31,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751076962] [2022-07-22 21:32:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751076962] [2022-07-22 21:32:31,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751076962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:31,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089914065] [2022-07-22 21:32:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:31,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:31,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:32:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:32:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:32:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:32,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089914065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:32:32,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:32:32,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:32:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018610421] [2022-07-22 21:32:32,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:32:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:32:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:32:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:32:32,103 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 217 [2022-07-22 21:32:32,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 160 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 173.3) internal successors, (1733), 10 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:32,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 217 [2022-07-22 21:32:32,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:32,166 INFO L129 PetriNetUnfolder]: 0/205 cut-off events. [2022-07-22 21:32:32,166 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:32:32,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 205 events. 0/205 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 379 event pairs, 0 based on Foata normal form. 2/207 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-22 21:32:32,167 INFO L132 encePairwiseOnDemand]: 211/217 looper letters, 14 selfloop transitions, 9 changer transitions 0/170 dead transitions. [2022-07-22 21:32:32,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 418 flow [2022-07-22 21:32:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:32:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:32:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1564 transitions. [2022-07-22 21:32:32,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8008192524321557 [2022-07-22 21:32:32,170 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1564 transitions. [2022-07-22 21:32:32,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1564 transitions. [2022-07-22 21:32:32,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:32,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1564 transitions. [2022-07-22 21:32:32,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.77777777777777) internal successors, (1564), 9 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,176 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 217.0) internal successors, (2170), 10 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,176 INFO L186 Difference]: Start difference. First operand has 173 places, 160 transitions, 350 flow. Second operand 9 states and 1564 transitions. [2022-07-22 21:32:32,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 418 flow [2022-07-22 21:32:32,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 170 transitions, 416 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:32,178 INFO L242 Difference]: Finished difference. Result has 182 places, 166 transitions, 398 flow [2022-07-22 21:32:32,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=398, PETRI_PLACES=182, PETRI_TRANSITIONS=166} [2022-07-22 21:32:32,179 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -8 predicate places. [2022-07-22 21:32:32,179 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 166 transitions, 398 flow [2022-07-22 21:32:32,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.3) internal successors, (1733), 10 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:32,180 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:32,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 21:32:32,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1833944158, now seen corresponding path program 1 times [2022-07-22 21:32:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:32,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254416242] [2022-07-22 21:32:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:32,412 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:32:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:32:32,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:32:32,427 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:32:32,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:32:32,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:32:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:32:32,428 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:32:32,428 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:32:32,428 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:32:32,443 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:32:32,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2022-07-22 21:32:32,559 INFO L129 PetriNetUnfolder]: 158/947 cut-off events. [2022-07-22 21:32:32,559 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:32:32,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 947 events. 158/947 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4170 event pairs, 23 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 651. Up to 80 conditions per place. [2022-07-22 21:32:32,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 247 transitions, 554 flow [2022-07-22 21:32:32,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 247 transitions, 554 flow [2022-07-22 21:32:32,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:32:32,579 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:32:32,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:32:32,583 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2022-07-22 21:32:32,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:32:32,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:32,584 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:32,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 968156414, now seen corresponding path program 1 times [2022-07-22 21:32:32,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:32,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578511155] [2022-07-22 21:32:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:32,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:32,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578511155] [2022-07-22 21:32:32,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578511155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:32,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:32,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:32:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051685031] [2022-07-22 21:32:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:32:32,600 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 247 [2022-07-22 21:32:32,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 247 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:32,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 247 [2022-07-22 21:32:32,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:32,709 INFO L129 PetriNetUnfolder]: 68/829 cut-off events. [2022-07-22 21:32:32,709 INFO L130 PetriNetUnfolder]: For 300/412 co-relation queries the response was YES. [2022-07-22 21:32:32,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 829 events. 68/829 cut-off events. For 300/412 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3978 event pairs, 23 based on Foata normal form. 880/1652 useless extension candidates. Maximal degree in co-relation 620. Up to 110 conditions per place. [2022-07-22 21:32:32,716 INFO L132 encePairwiseOnDemand]: 209/247 looper letters, 14 selfloop transitions, 2 changer transitions 28/215 dead transitions. [2022-07-22 21:32:32,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 215 transitions, 532 flow [2022-07-22 21:32:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2022-07-22 21:32:32,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8717948717948718 [2022-07-22 21:32:32,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2022-07-22 21:32:32,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2022-07-22 21:32:32,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:32,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2022-07-22 21:32:32,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,721 INFO L186 Difference]: Start difference. First operand has 215 places, 247 transitions, 554 flow. Second operand 3 states and 646 transitions. [2022-07-22 21:32:32,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 215 transitions, 532 flow [2022-07-22 21:32:32,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 215 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:32:32,754 INFO L242 Difference]: Finished difference. Result has 217 places, 184 transitions, 423 flow [2022-07-22 21:32:32,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=217, PETRI_TRANSITIONS=184} [2022-07-22 21:32:32,755 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-22 21:32:32,755 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 184 transitions, 423 flow [2022-07-22 21:32:32,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:32,755 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:32,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:32:32,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:32,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1460849105, now seen corresponding path program 1 times [2022-07-22 21:32:32,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:32,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920953009] [2022-07-22 21:32:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:32,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:32,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920953009] [2022-07-22 21:32:32,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920953009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:32,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116211985] [2022-07-22 21:32:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:32,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:32,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:32:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:32,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:32:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:32:32,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:32:32,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116211985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:32,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:32:32,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:32:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651010065] [2022-07-22 21:32:32,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:32:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:32:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:32:32,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-22 21:32:32,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 184 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:32,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-22 21:32:32,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:32,896 INFO L129 PetriNetUnfolder]: 0/292 cut-off events. [2022-07-22 21:32:32,896 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-07-22 21:32:32,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 292 events. 0/292 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 802 event pairs, 0 based on Foata normal form. 5/292 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-22 21:32:32,897 INFO L132 encePairwiseOnDemand]: 245/247 looper letters, 9 selfloop transitions, 0 changer transitions 1/184 dead transitions. [2022-07-22 21:32:32,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 184 transitions, 443 flow [2022-07-22 21:32:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:32:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:32:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-07-22 21:32:32,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.796221322537112 [2022-07-22 21:32:32,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-07-22 21:32:32,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-07-22 21:32:32,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:32,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-07-22 21:32:32,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,901 INFO L186 Difference]: Start difference. First operand has 217 places, 184 transitions, 423 flow. Second operand 3 states and 590 transitions. [2022-07-22 21:32:32,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 184 transitions, 443 flow [2022-07-22 21:32:32,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 184 transitions, 421 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:32,904 INFO L242 Difference]: Finished difference. Result has 198 places, 183 transitions, 401 flow [2022-07-22 21:32:32,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=198, PETRI_TRANSITIONS=183} [2022-07-22 21:32:32,904 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -17 predicate places. [2022-07-22 21:32:32,905 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 183 transitions, 401 flow [2022-07-22 21:32:32,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:32,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:32,905 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:32,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:32:33,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash -563730726, now seen corresponding path program 1 times [2022-07-22 21:32:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:33,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153357220] [2022-07-22 21:32:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153357220] [2022-07-22 21:32:33,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153357220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:33,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557200818] [2022-07-22 21:32:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:33,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:33,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:32:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:33,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:32:33,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:32:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:32:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557200818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:32:33,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:32:33,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:32:33,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785157221] [2022-07-22 21:32:33,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:32:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:32:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:32:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:32:33,260 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-22 21:32:33,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 183 transitions, 401 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:33,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-22 21:32:33,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:33,329 INFO L129 PetriNetUnfolder]: 0/252 cut-off events. [2022-07-22 21:32:33,329 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:32:33,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 252 events. 0/252 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 546 event pairs, 0 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:32:33,330 INFO L132 encePairwiseOnDemand]: 241/247 looper letters, 15 selfloop transitions, 9 changer transitions 0/193 dead transitions. [2022-07-22 21:32:33,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 193 transitions, 471 flow [2022-07-22 21:32:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:32:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:32:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1763 transitions. [2022-07-22 21:32:33,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930724246513721 [2022-07-22 21:32:33,333 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1763 transitions. [2022-07-22 21:32:33,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1763 transitions. [2022-07-22 21:32:33,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:33,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1763 transitions. [2022-07-22 21:32:33,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.88888888888889) internal successors, (1763), 9 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,340 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,340 INFO L186 Difference]: Start difference. First operand has 198 places, 183 transitions, 401 flow. Second operand 9 states and 1763 transitions. [2022-07-22 21:32:33,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 193 transitions, 471 flow [2022-07-22 21:32:33,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 193 transitions, 469 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:32:33,342 INFO L242 Difference]: Finished difference. Result has 207 places, 189 transitions, 449 flow [2022-07-22 21:32:33,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=449, PETRI_PLACES=207, PETRI_TRANSITIONS=189} [2022-07-22 21:32:33,343 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -8 predicate places. [2022-07-22 21:32:33,343 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 189 transitions, 449 flow [2022-07-22 21:32:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:33,344 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:33,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:33,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:32:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 504352831, now seen corresponding path program 1 times [2022-07-22 21:32:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:33,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41967244] [2022-07-22 21:32:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:32:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41967244] [2022-07-22 21:32:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41967244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:32:33,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:32:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:32:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259992398] [2022-07-22 21:32:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:32:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:32:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:32:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:32:33,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-07-22 21:32:33,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 189 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:33,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:33,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-07-22 21:32:33,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:59,495 INFO L129 PetriNetUnfolder]: 110509/245361 cut-off events. [2022-07-22 21:32:59,495 INFO L130 PetriNetUnfolder]: For 2354/2354 co-relation queries the response was YES. [2022-07-22 21:33:02,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389077 conditions, 245361 events. 110509/245361 cut-off events. For 2354/2354 co-relation queries the response was YES. Maximal size of possible extension queue 8896. Compared 3383195 event pairs, 63940 based on Foata normal form. 3875/244896 useless extension candidates. Maximal degree in co-relation 389065. Up to 88950 conditions per place. [2022-07-22 21:33:03,071 INFO L132 encePairwiseOnDemand]: 238/247 looper letters, 38 selfloop transitions, 6 changer transitions 65/268 dead transitions. [2022-07-22 21:33:03,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 268 transitions, 845 flow [2022-07-22 21:33:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:33:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:33:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1336 transitions. [2022-07-22 21:33:03,075 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.772700983227299 [2022-07-22 21:33:03,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1336 transitions. [2022-07-22 21:33:03,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1336 transitions. [2022-07-22 21:33:03,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:03,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1336 transitions. [2022-07-22 21:33:03,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,080 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,080 INFO L186 Difference]: Start difference. First operand has 207 places, 189 transitions, 449 flow. Second operand 7 states and 1336 transitions. [2022-07-22 21:33:03,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 268 transitions, 845 flow [2022-07-22 21:33:03,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 268 transitions, 839 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:03,085 INFO L242 Difference]: Finished difference. Result has 217 places, 194 transitions, 511 flow [2022-07-22 21:33:03,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=511, PETRI_PLACES=217, PETRI_TRANSITIONS=194} [2022-07-22 21:33:03,086 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-22 21:33:03,086 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 194 transitions, 511 flow [2022-07-22 21:33:03,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.6) internal successors, (883), 5 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:03,096 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:03,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:33:03,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash -941502955, now seen corresponding path program 1 times [2022-07-22 21:33:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:03,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324559362] [2022-07-22 21:33:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324559362] [2022-07-22 21:33:03,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324559362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367989977] [2022-07-22 21:33:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:03,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:03,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:33:03,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:33:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:03,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367989977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:03,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017231549] [2022-07-22 21:33:03,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:03,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-22 21:33:03,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 194 transitions, 511 flow. Second operand has 18 states, 18 states have (on average 195.61111111111111) internal successors, (3521), 18 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:03,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-22 21:33:03,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:03,536 INFO L129 PetriNetUnfolder]: 49/646 cut-off events. [2022-07-22 21:33:03,536 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-22 21:33:03,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 646 events. 49/646 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3370 event pairs, 23 based on Foata normal form. 3/632 useless extension candidates. Maximal degree in co-relation 962. Up to 81 conditions per place. [2022-07-22 21:33:03,544 INFO L132 encePairwiseOnDemand]: 242/247 looper letters, 18 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2022-07-22 21:33:03,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 194 transitions, 591 flow [2022-07-22 21:33:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:33:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:33:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3511 transitions. [2022-07-22 21:33:03,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7896986054880791 [2022-07-22 21:33:03,549 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3511 transitions. [2022-07-22 21:33:03,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3511 transitions. [2022-07-22 21:33:03,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:03,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3511 transitions. [2022-07-22 21:33:03,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 195.05555555555554) internal successors, (3511), 18 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,560 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 247.0) internal successors, (4693), 19 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,560 INFO L186 Difference]: Start difference. First operand has 217 places, 194 transitions, 511 flow. Second operand 18 states and 3511 transitions. [2022-07-22 21:33:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 194 transitions, 591 flow [2022-07-22 21:33:03,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 194 transitions, 554 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-22 21:33:03,564 INFO L242 Difference]: Finished difference. Result has 209 places, 185 transitions, 490 flow [2022-07-22 21:33:03,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=490, PETRI_PLACES=209, PETRI_TRANSITIONS=185} [2022-07-22 21:33:03,564 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, -6 predicate places. [2022-07-22 21:33:03,564 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 185 transitions, 490 flow [2022-07-22 21:33:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 195.61111111111111) internal successors, (3521), 18 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:03,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:03,566 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:03,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:03,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 240254198, now seen corresponding path program 1 times [2022-07-22 21:33:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876105912] [2022-07-22 21:33:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:03,800 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:03,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:03,822 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:03,822 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:03,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:33:03,822 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:33:03,823 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:03,823 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:33:03,841 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:33:03,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 240 places, 277 transitions, 632 flow [2022-07-22 21:33:04,090 INFO L129 PetriNetUnfolder]: 284/1576 cut-off events. [2022-07-22 21:33:04,090 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-22 21:33:04,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 1576 events. 284/1576 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8592 event pairs, 72 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1046. Up to 192 conditions per place. [2022-07-22 21:33:04,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 277 transitions, 632 flow [2022-07-22 21:33:04,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 277 transitions, 632 flow [2022-07-22 21:33:04,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:04,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@236977b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142c61b3 [2022-07-22 21:33:04,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:04,128 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-22 21:33:04,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:04,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:04,128 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:04,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash 304016562, now seen corresponding path program 1 times [2022-07-22 21:33:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:04,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966766647] [2022-07-22 21:33:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:04,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966766647] [2022-07-22 21:33:04,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966766647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:04,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:04,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242152231] [2022-07-22 21:33:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:04,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:04,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-07-22 21:33:04,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 277 transitions, 632 flow. Second operand has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:04,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-07-22 21:33:04,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:04,316 INFO L129 PetriNetUnfolder]: 156/1441 cut-off events. [2022-07-22 21:33:04,317 INFO L130 PetriNetUnfolder]: For 654/684 co-relation queries the response was YES. [2022-07-22 21:33:04,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 1441 events. 156/1441 cut-off events. For 654/684 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8423 event pairs, 72 based on Foata normal form. 1314/2656 useless extension candidates. Maximal degree in co-relation 1039. Up to 199 conditions per place. [2022-07-22 21:33:04,334 INFO L132 encePairwiseOnDemand]: 236/277 looper letters, 6 selfloop transitions, 0 changer transitions 29/235 dead transitions. [2022-07-22 21:33:04,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 235 transitions, 572 flow [2022-07-22 21:33:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 499 transitions. [2022-07-22 21:33:04,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9007220216606499 [2022-07-22 21:33:04,335 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 499 transitions. [2022-07-22 21:33:04,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 499 transitions. [2022-07-22 21:33:04,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:04,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 499 transitions. [2022-07-22 21:33:04,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 249.5) internal successors, (499), 2 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,338 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,338 INFO L186 Difference]: Start difference. First operand has 240 places, 277 transitions, 632 flow. Second operand 2 states and 499 transitions. [2022-07-22 21:33:04,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 235 transitions, 572 flow [2022-07-22 21:33:04,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 235 transitions, 572 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:04,341 INFO L242 Difference]: Finished difference. Result has 240 places, 206 transitions, 472 flow [2022-07-22 21:33:04,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=472, PETRI_PLACES=240, PETRI_TRANSITIONS=206} [2022-07-22 21:33:04,343 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, 0 predicate places. [2022-07-22 21:33:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 206 transitions, 472 flow [2022-07-22 21:33:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 223.5) internal successors, (447), 2 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:04,344 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:04,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:33:04,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash 10613555, now seen corresponding path program 1 times [2022-07-22 21:33:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745467065] [2022-07-22 21:33:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745467065] [2022-07-22 21:33:04,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745467065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:04,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:04,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529922183] [2022-07-22 21:33:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:04,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:04,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:04,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:04,366 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 277 [2022-07-22 21:33:04,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 206 transitions, 472 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:04,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 277 [2022-07-22 21:33:04,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:04,407 INFO L129 PetriNetUnfolder]: 6/335 cut-off events. [2022-07-22 21:33:04,408 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:33:04,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 335 events. 6/335 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 918 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 408. Up to 36 conditions per place. [2022-07-22 21:33:04,410 INFO L132 encePairwiseOnDemand]: 274/277 looper letters, 15 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2022-07-22 21:33:04,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 210 transitions, 514 flow [2022-07-22 21:33:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-07-22 21:33:04,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8014440433212996 [2022-07-22 21:33:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-07-22 21:33:04,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-07-22 21:33:04,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:04,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-07-22 21:33:04,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,416 INFO L186 Difference]: Start difference. First operand has 240 places, 206 transitions, 472 flow. Second operand 3 states and 666 transitions. [2022-07-22 21:33:04,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 210 transitions, 514 flow [2022-07-22 21:33:04,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 210 transitions, 484 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:04,418 INFO L242 Difference]: Finished difference. Result has 222 places, 207 transitions, 454 flow [2022-07-22 21:33:04,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=222, PETRI_TRANSITIONS=207} [2022-07-22 21:33:04,419 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -18 predicate places. [2022-07-22 21:33:04,419 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 207 transitions, 454 flow [2022-07-22 21:33:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:04,420 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:33:04,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1928096672, now seen corresponding path program 1 times [2022-07-22 21:33:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515538239] [2022-07-22 21:33:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515538239] [2022-07-22 21:33:04,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515538239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619542843] [2022-07-22 21:33:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:04,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:33:04,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:33:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:33:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:33:04,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:33:04,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619542843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:04,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:33:04,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:33:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770577445] [2022-07-22 21:33:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:33:04,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 277 [2022-07-22 21:33:04,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 207 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:04,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 277 [2022-07-22 21:33:04,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:04,570 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2022-07-22 21:33:04,570 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:33:04,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 341 events. 0/341 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 987 event pairs, 0 based on Foata normal form. 6/341 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-22 21:33:04,570 INFO L132 encePairwiseOnDemand]: 275/277 looper letters, 10 selfloop transitions, 0 changer transitions 1/207 dead transitions. [2022-07-22 21:33:04,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 207 transitions, 476 flow [2022-07-22 21:33:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2022-07-22 21:33:04,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7906137184115524 [2022-07-22 21:33:04,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2022-07-22 21:33:04,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2022-07-22 21:33:04,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:04,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2022-07-22 21:33:04,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,575 INFO L186 Difference]: Start difference. First operand has 222 places, 207 transitions, 454 flow. Second operand 3 states and 657 transitions. [2022-07-22 21:33:04,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 207 transitions, 476 flow [2022-07-22 21:33:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 207 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:04,577 INFO L242 Difference]: Finished difference. Result has 224 places, 206 transitions, 452 flow [2022-07-22 21:33:04,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=224, PETRI_TRANSITIONS=206} [2022-07-22 21:33:04,578 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -16 predicate places. [2022-07-22 21:33:04,578 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 206 transitions, 452 flow [2022-07-22 21:33:04,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:04,579 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:04,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:04,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 21:33:04,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:04,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1382932331, now seen corresponding path program 1 times [2022-07-22 21:33:04,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:04,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272116551] [2022-07-22 21:33:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272116551] [2022-07-22 21:33:04,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272116551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478065197] [2022-07-22 21:33:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:04,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:04,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:04,814 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:33:04,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:33:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:04,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478065197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:04,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:04,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:04,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742858562] [2022-07-22 21:33:04,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:04,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:04,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:04,937 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 277 [2022-07-22 21:33:04,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 206 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 217.3) internal successors, (2173), 10 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:04,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:04,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 277 [2022-07-22 21:33:04,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:05,014 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2022-07-22 21:33:05,014 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:33:05,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 299 events. 0/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 715 event pairs, 0 based on Foata normal form. 2/301 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-22 21:33:05,015 INFO L132 encePairwiseOnDemand]: 271/277 looper letters, 16 selfloop transitions, 9 changer transitions 0/216 dead transitions. [2022-07-22 21:33:05,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 216 transitions, 524 flow [2022-07-22 21:33:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1962 transitions. [2022-07-22 21:33:05,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7870036101083032 [2022-07-22 21:33:05,020 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1962 transitions. [2022-07-22 21:33:05,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1962 transitions. [2022-07-22 21:33:05,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:05,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1962 transitions. [2022-07-22 21:33:05,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 218.0) internal successors, (1962), 9 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:05,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:05,026 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:05,026 INFO L186 Difference]: Start difference. First operand has 224 places, 206 transitions, 452 flow. Second operand 9 states and 1962 transitions. [2022-07-22 21:33:05,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 216 transitions, 524 flow [2022-07-22 21:33:05,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 216 transitions, 522 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:05,030 INFO L242 Difference]: Finished difference. Result has 233 places, 212 transitions, 500 flow [2022-07-22 21:33:05,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=500, PETRI_PLACES=233, PETRI_TRANSITIONS=212} [2022-07-22 21:33:05,030 INFO L279 CegarLoopForPetriNet]: 240 programPoint places, -7 predicate places. [2022-07-22 21:33:05,030 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 212 transitions, 500 flow [2022-07-22 21:33:05,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.3) internal successors, (2173), 10 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:05,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:05,031 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:05,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 21:33:05,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1385977400, now seen corresponding path program 1 times [2022-07-22 21:33:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:05,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929286774] [2022-07-22 21:33:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 21:33:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929286774] [2022-07-22 21:33:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929286774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:05,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:05,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:33:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582307157] [2022-07-22 21:33:05,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:33:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:33:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:33:05,306 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 277 [2022-07-22 21:33:05,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 212 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:05,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:05,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 277 [2022-07-22 21:33:05,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand