./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:57:50,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:57:50,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:57:50,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:57:50,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:57:50,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:57:50,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:57:50,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:57:50,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:57:50,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:57:50,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:57:50,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:57:50,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:57:50,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:57:50,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:57:50,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:57:50,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:57:50,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:57:50,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:57:50,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:57:50,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:57:50,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:57:50,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:57:50,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:57:50,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:57:50,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:57:50,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:57:50,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:57:50,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:57:50,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:57:50,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:57:50,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:57:50,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:57:50,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:57:50,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:57:50,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:57:50,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:57:50,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:57:50,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:57:50,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:57:50,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:57:50,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:57:50,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:57:50,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:57:50,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:57:50,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:57:50,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:57:50,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:57:50,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:57:50,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:57:50,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:57:50,303 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:57:50,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:57:50,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:57:50,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:57:50,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:57:50,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:57:50,305 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:57:50,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:57:50,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:57:50,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:57:50,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:57:50,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:57:50,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:57:50,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:57:50,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:57:50,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:57:50,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:57:50,313 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:57:50,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:57:50,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:57:50,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-07-13 21:57:50,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:57:50,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:57:50,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:57:50,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:57:50,550 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:57:50,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-07-13 21:57:50,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b75c22a0/9e28313de519439986692e5bafa37607/FLAG7c6115edf [2022-07-13 21:57:51,098 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:57:51,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-07-13 21:57:51,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b75c22a0/9e28313de519439986692e5bafa37607/FLAG7c6115edf [2022-07-13 21:57:51,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b75c22a0/9e28313de519439986692e5bafa37607 [2022-07-13 21:57:51,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:57:51,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:57:51,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:57:51,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:57:51,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:57:51,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:57:51" (1/1) ... [2022-07-13 21:57:51,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334fd84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:51, skipping insertion in model container [2022-07-13 21:57:51,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:57:51" (1/1) ... [2022-07-13 21:57:51,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:57:51,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:57:51,917 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_75-tricky_address2_racefree.i[41323,41336] [2022-07-13 21:57:51,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:57:51,950 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:57:51,992 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_75-tricky_address2_racefree.i[41323,41336] [2022-07-13 21:57:52,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:57:52,062 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:57:52,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52 WrapperNode [2022-07-13 21:57:52,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:57:52,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:57:52,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:57:52,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:57:52,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,128 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-07-13 21:57:52,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:57:52,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:57:52,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:57:52,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:57:52,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:57:52,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:57:52,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:57:52,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:57:52,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (1/1) ... [2022-07-13 21:57:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:57:52,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:52,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:57:52,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:57:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:57:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:57:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:57:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:57:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:57:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:57:52,252 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:57:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:57:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:57:52,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:57:52,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:57:52,255 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:57:52,399 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:57:52,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:57:52,647 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:57:52,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:57:52,661 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-13 21:57:52,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:57:52 BoogieIcfgContainer [2022-07-13 21:57:52,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:57:52,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:57:52,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:57:52,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:57:52,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:57:51" (1/3) ... [2022-07-13 21:57:52,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca88f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:57:52, skipping insertion in model container [2022-07-13 21:57:52,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:52" (2/3) ... [2022-07-13 21:57:52,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca88f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:57:52, skipping insertion in model container [2022-07-13 21:57:52,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:57:52" (3/3) ... [2022-07-13 21:57:52,674 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-07-13 21:57:52,678 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:57:52,685 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:57:52,685 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:57:52,685 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:57:52,767 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:57:52,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-07-13 21:57:52,867 INFO L129 PetriNetUnfolder]: 45/269 cut-off events. [2022-07-13 21:57:52,867 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-13 21:57:52,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 860 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-07-13 21:57:52,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-07-13 21:57:52,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-07-13 21:57:52,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:52,895 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@17c05519, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7af95e51 [2022-07-13 21:57:52,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:57:52,915 INFO L129 PetriNetUnfolder]: 12/127 cut-off events. [2022-07-13 21:57:52,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:52,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:52,917 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] [2022-07-13 21:57:52,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1893756395, now seen corresponding path program 1 times [2022-07-13 21:57:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:52,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354654847] [2022-07-13 21:57:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:53,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354654847] [2022-07-13 21:57:53,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354654847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:53,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:53,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79252049] [2022-07-13 21:57:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:53,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:53,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 197 [2022-07-13 21:57:53,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 192 transitions, 389 flow. Second operand has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:53,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 197 [2022-07-13 21:57:53,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:53,238 INFO L129 PetriNetUnfolder]: 4/221 cut-off events. [2022-07-13 21:57:53,239 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:53,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 221 events. 4/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 636 event pairs, 0 based on Foata normal form. 40/248 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-07-13 21:57:53,242 INFO L132 encePairwiseOnDemand]: 170/197 looper letters, 1 selfloop transitions, 0 changer transitions 1/163 dead transitions. [2022-07-13 21:57:53,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 163 transitions, 333 flow [2022-07-13 21:57:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 360 transitions. [2022-07-13 21:57:53,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9137055837563451 [2022-07-13 21:57:53,266 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 360 transitions. [2022-07-13 21:57:53,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 360 transitions. [2022-07-13 21:57:53,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:53,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 360 transitions. [2022-07-13 21:57:53,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,280 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,282 INFO L186 Difference]: Start difference. First operand has 165 places, 192 transitions, 389 flow. Second operand 2 states and 360 transitions. [2022-07-13 21:57:53,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 163 transitions, 333 flow [2022-07-13 21:57:53,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 163 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:53,298 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 329 flow [2022-07-13 21:57:53,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=329, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2022-07-13 21:57:53,305 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -1 predicate places. [2022-07-13 21:57:53,306 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 329 flow [2022-07-13 21:57:53,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:53,307 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] [2022-07-13 21:57:53,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:57:53,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1763164273, now seen corresponding path program 1 times [2022-07-13 21:57:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:53,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86452778] [2022-07-13 21:57:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:53,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86452778] [2022-07-13 21:57:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86452778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:53,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:53,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077583403] [2022-07-13 21:57:53,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:53,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-13 21:57:53,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:53,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-13 21:57:53,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:53,456 INFO L129 PetriNetUnfolder]: 4/224 cut-off events. [2022-07-13 21:57:53,456 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:53,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-07-13 21:57:53,459 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 10 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-13 21:57:53,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 166 transitions, 361 flow [2022-07-13 21:57:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-07-13 21:57:53,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291032148900169 [2022-07-13 21:57:53,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-07-13 21:57:53,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-07-13 21:57:53,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:53,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-07-13 21:57:53,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,471 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 329 flow. Second operand 3 states and 490 transitions. [2022-07-13 21:57:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 166 transitions, 361 flow [2022-07-13 21:57:53,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 361 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:53,477 INFO L242 Difference]: Finished difference. Result has 166 places, 163 transitions, 341 flow [2022-07-13 21:57:53,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-07-13 21:57:53,479 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 1 predicate places. [2022-07-13 21:57:53,479 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 341 flow [2022-07-13 21:57:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:53,481 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] [2022-07-13 21:57:53,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:57:53,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2008438335, now seen corresponding path program 1 times [2022-07-13 21:57:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:53,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150708169] [2022-07-13 21:57:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:53,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:53,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150708169] [2022-07-13 21:57:53,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150708169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109350498] [2022-07-13 21:57:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:53,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:53,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:57:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:57:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:57:53,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:57:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109350498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:53,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:57:53,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:57:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312820566] [2022-07-13 21:57:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:53,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:57:53,757 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-13 21:57:53,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:53,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-13 21:57:53,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:53,813 INFO L129 PetriNetUnfolder]: 3/170 cut-off events. [2022-07-13 21:57:53,814 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:53,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 170 events. 3/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 188. Up to 6 conditions per place. [2022-07-13 21:57:53,821 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 8 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2022-07-13 21:57:53,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 365 flow [2022-07-13 21:57:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-07-13 21:57:53,828 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8257191201353637 [2022-07-13 21:57:53,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-07-13 21:57:53,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-07-13 21:57:53,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:53,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-07-13 21:57:53,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,834 INFO L186 Difference]: Start difference. First operand has 166 places, 163 transitions, 341 flow. Second operand 3 states and 488 transitions. [2022-07-13 21:57:53,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 365 flow [2022-07-13 21:57:53,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:53,841 INFO L242 Difference]: Finished difference. Result has 168 places, 163 transitions, 347 flow [2022-07-13 21:57:53,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2022-07-13 21:57:53,843 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-07-13 21:57:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 347 flow [2022-07-13 21:57:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:53,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:53,844 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] [2022-07-13 21:57:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:54,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -408777690, now seen corresponding path program 1 times [2022-07-13 21:57:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:54,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224825090] [2022-07-13 21:57:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224825090] [2022-07-13 21:57:54,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224825090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:54,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225534959] [2022-07-13 21:57:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:54,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:54,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:54,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:57:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:54,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:54,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225534959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:54,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:54,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088072535] [2022-07-13 21:57:54,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:54,362 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-13 21:57:54,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:54,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-13 21:57:54,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:54,447 INFO L129 PetriNetUnfolder]: 3/177 cut-off events. [2022-07-13 21:57:54,448 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:57:54,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 177 events. 3/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 209. Up to 6 conditions per place. [2022-07-13 21:57:54,450 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-13 21:57:54,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 173 transitions, 409 flow [2022-07-13 21:57:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-07-13 21:57:54,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.81443880428652 [2022-07-13 21:57:54,454 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-07-13 21:57:54,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-07-13 21:57:54,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:54,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-07-13 21:57:54,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,463 INFO L186 Difference]: Start difference. First operand has 168 places, 163 transitions, 347 flow. Second operand 9 states and 1444 transitions. [2022-07-13 21:57:54,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 173 transitions, 409 flow [2022-07-13 21:57:54,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:57:54,470 INFO L242 Difference]: Finished difference. Result has 177 places, 169 transitions, 393 flow [2022-07-13 21:57:54,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=177, PETRI_TRANSITIONS=169} [2022-07-13 21:57:54,472 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 12 predicate places. [2022-07-13 21:57:54,472 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 169 transitions, 393 flow [2022-07-13 21:57:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:54,474 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-13 21:57:54,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 21:57:54,695 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,SelfDestructingSolverStorable3 [2022-07-13 21:57:54,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash 81295910, now seen corresponding path program 2 times [2022-07-13 21:57:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077394403] [2022-07-13 21:57:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:54,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077394403] [2022-07-13 21:57:54,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077394403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483788925] [2022-07-13 21:57:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:57:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:54,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:54,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:57:54,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:57:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:57:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:54,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:55,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483788925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:55,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:55,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:55,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922626101] [2022-07-13 21:57:55,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:55,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:55,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:55,056 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-13 21:57:55,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 169 transitions, 393 flow. Second operand has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:55,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:55,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-13 21:57:55,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:55,249 INFO L129 PetriNetUnfolder]: 3/197 cut-off events. [2022-07-13 21:57:55,249 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 21:57:55,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 197 events. 3/197 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 295. Up to 11 conditions per place. [2022-07-13 21:57:55,251 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 19 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2022-07-13 21:57:55,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 193 transitions, 581 flow [2022-07-13 21:57:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3362 transitions. [2022-07-13 21:57:55,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8126661832245589 [2022-07-13 21:57:55,259 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3362 transitions. [2022-07-13 21:57:55,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3362 transitions. [2022-07-13 21:57:55,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:55,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3362 transitions. [2022-07-13 21:57:55,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0952380952381) internal successors, (3362), 21 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:55,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:55,276 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:55,276 INFO L186 Difference]: Start difference. First operand has 177 places, 169 transitions, 393 flow. Second operand 21 states and 3362 transitions. [2022-07-13 21:57:55,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 193 transitions, 581 flow [2022-07-13 21:57:55,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 567 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:55,281 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 517 flow [2022-07-13 21:57:55,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=517, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2022-07-13 21:57:55,282 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 36 predicate places. [2022-07-13 21:57:55,282 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 517 flow [2022-07-13 21:57:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:55,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:55,284 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-13 21:57:55,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:55,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:55,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 653252134, now seen corresponding path program 3 times [2022-07-13 21:57:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:55,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275901935] [2022-07-13 21:57:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:55,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275901935] [2022-07-13 21:57:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275901935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684306126] [2022-07-13 21:57:55,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:57:55,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:55,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:57:55,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:57:55,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:57:55,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:55,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:57:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684306126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:56,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:57:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823396552] [2022-07-13 21:57:56,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:57:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:57:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:57:56,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-13 21:57:56,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 517 flow. Second operand has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:56,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-13 21:57:56,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:56,331 INFO L129 PetriNetUnfolder]: 3/212 cut-off events. [2022-07-13 21:57:56,331 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:57:56,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 212 events. 3/212 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 391. Up to 17 conditions per place. [2022-07-13 21:57:56,334 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 25 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-07-13 21:57:56,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 208 transitions, 773 flow [2022-07-13 21:57:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:57:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:57:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4798 transitions. [2022-07-13 21:57:56,344 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811844331641286 [2022-07-13 21:57:56,344 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4798 transitions. [2022-07-13 21:57:56,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4798 transitions. [2022-07-13 21:57:56,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:56,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4798 transitions. [2022-07-13 21:57:56,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.93333333333334) internal successors, (4798), 30 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,372 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,373 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 517 flow. Second operand 30 states and 4798 transitions. [2022-07-13 21:57:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 208 transitions, 773 flow [2022-07-13 21:57:56,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 208 transitions, 743 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:56,383 INFO L242 Difference]: Finished difference. Result has 228 places, 192 transitions, 645 flow [2022-07-13 21:57:56,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=645, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2022-07-13 21:57:56,386 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 63 predicate places. [2022-07-13 21:57:56,386 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 645 flow [2022-07-13 21:57:56,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,388 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-13 21:57:56,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:56,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:56,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-13 21:57:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2059256618, now seen corresponding path program 4 times [2022-07-13 21:57:56,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300024896] [2022-07-13 21:57:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:56,642 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:56,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:56,693 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:56,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:57:56,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:57:56,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-13 21:57:56,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:57:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:57:56,697 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-13 21:57:56,699 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:56,699 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:57:56,722 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:57:56,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-07-13 21:57:56,775 INFO L129 PetriNetUnfolder]: 75/438 cut-off events. [2022-07-13 21:57:56,775 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-13 21:57:56,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1746 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-07-13 21:57:56,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-07-13 21:57:56,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-07-13 21:57:56,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:56,787 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@17c05519, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7af95e51 [2022-07-13 21:57:56,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:57:56,795 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-13 21:57:56,795 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:56,795 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,795 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] [2022-07-13 21:57:56,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash -280318449, now seen corresponding path program 1 times [2022-07-13 21:57:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771310900] [2022-07-13 21:57:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:56,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771310900] [2022-07-13 21:57:56,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771310900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:56,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:56,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417004820] [2022-07-13 21:57:56,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:56,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:56,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:56,815 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 269 [2022-07-13 21:57:56,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 556 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:56,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 269 [2022-07-13 21:57:56,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:56,864 INFO L129 PetriNetUnfolder]: 9/367 cut-off events. [2022-07-13 21:57:56,865 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-13 21:57:56,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 367 events. 9/367 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1431 event pairs, 0 based on Foata normal form. 91/437 useless extension candidates. Maximal degree in co-relation 230. Up to 7 conditions per place. [2022-07-13 21:57:56,869 INFO L132 encePairwiseOnDemand]: 230/269 looper letters, 4 selfloop transitions, 0 changer transitions 1/227 dead transitions. [2022-07-13 21:57:56,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 480 flow [2022-07-13 21:57:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 489 transitions. [2022-07-13 21:57:56,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9089219330855018 [2022-07-13 21:57:56,872 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 489 transitions. [2022-07-13 21:57:56,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 489 transitions. [2022-07-13 21:57:56,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:56,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 489 transitions. [2022-07-13 21:57:56,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,875 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,875 INFO L186 Difference]: Start difference. First operand has 229 places, 269 transitions, 556 flow. Second operand 2 states and 489 transitions. [2022-07-13 21:57:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 480 flow [2022-07-13 21:57:56,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:56,879 INFO L242 Difference]: Finished difference. Result has 227 places, 226 transitions, 470 flow [2022-07-13 21:57:56,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-07-13 21:57:56,880 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, -2 predicate places. [2022-07-13 21:57:56,881 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 470 flow [2022-07-13 21:57:56,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,881 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] [2022-07-13 21:57:56,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:57:56,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2106119919, now seen corresponding path program 1 times [2022-07-13 21:57:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135289993] [2022-07-13 21:57:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:56,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135289993] [2022-07-13 21:57:56,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135289993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:56,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:56,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:56,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864204419] [2022-07-13 21:57:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:56,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-13 21:57:56,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 470 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) [2022-07-13 21:57:56,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:56,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-13 21:57:56,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:56,978 INFO L129 PetriNetUnfolder]: 9/370 cut-off events. [2022-07-13 21:57:56,978 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-13 21:57:56,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 370 events. 9/370 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1428 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 398. Up to 14 conditions per place. [2022-07-13 21:57:56,984 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-07-13 21:57:56,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-07-13 21:57:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-13 21:57:56,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-13 21:57:56,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-13 21:57:56,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-13 21:57:56,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:56,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-13 21:57:56,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,990 INFO L186 Difference]: Start difference. First operand has 227 places, 226 transitions, 470 flow. Second operand 3 states and 664 transitions. [2022-07-13 21:57:56,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-07-13 21:57:56,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:56,995 INFO L242 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-07-13 21:57:56,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-07-13 21:57:56,996 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 0 predicate places. [2022-07-13 21:57:56,996 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-07-13 21:57:56,997 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) [2022-07-13 21:57:56,997 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,997 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] [2022-07-13 21:57:56,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:57:56,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 178238190, now seen corresponding path program 1 times [2022-07-13 21:57:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376323867] [2022-07-13 21:57:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376323867] [2022-07-13 21:57:57,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376323867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918892170] [2022-07-13 21:57:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:57,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:57,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:57:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:57:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:57:57,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:57:57,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918892170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:57,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:57:57,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:57:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233194738] [2022-07-13 21:57:57,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:57,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:57:57,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-13 21:57:57,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 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) [2022-07-13 21:57:57,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:57,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-13 21:57:57,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:57,188 INFO L129 PetriNetUnfolder]: 7/325 cut-off events. [2022-07-13 21:57:57,188 INFO L130 PetriNetUnfolder]: For 15/34 co-relation queries the response was YES. [2022-07-13 21:57:57,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 325 events. 7/325 cut-off events. For 15/34 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1109 event pairs, 0 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2022-07-13 21:57:57,193 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/231 dead transitions. [2022-07-13 21:57:57,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 231 transitions, 520 flow [2022-07-13 21:57:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-13 21:57:57,196 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-13 21:57:57,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-13 21:57:57,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-13 21:57:57,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:57,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-13 21:57:57,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,200 INFO L186 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 3 states and 664 transitions. [2022-07-13 21:57:57,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 231 transitions, 520 flow [2022-07-13 21:57:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 231 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:57,204 INFO L242 Difference]: Finished difference. Result has 231 places, 228 transitions, 492 flow [2022-07-13 21:57:57,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=231, PETRI_TRANSITIONS=228} [2022-07-13 21:57:57,206 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 2 predicate places. [2022-07-13 21:57:57,206 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 228 transitions, 492 flow [2022-07-13 21:57:57,206 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) [2022-07-13 21:57:57,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:57,207 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] [2022-07-13 21:57:57,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 21:57:57,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1515379677, now seen corresponding path program 1 times [2022-07-13 21:57:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95860610] [2022-07-13 21:57:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:57,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:57,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95860610] [2022-07-13 21:57:57,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95860610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:57,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533861544] [2022-07-13 21:57:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:57,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:57,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:57:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:57,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:57,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533861544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:57,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:57,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:57,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405631991] [2022-07-13 21:57:57,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:57,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:57,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:57,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-13 21:57:57,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 228 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:57,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-13 21:57:57,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:57,726 INFO L129 PetriNetUnfolder]: 7/332 cut-off events. [2022-07-13 21:57:57,727 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-13 21:57:57,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 332 events. 7/332 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 379. Up to 11 conditions per place. [2022-07-13 21:57:57,731 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 14 selfloop transitions, 9 changer transitions 0/238 dead transitions. [2022-07-13 21:57:57,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 238 transitions, 560 flow [2022-07-13 21:57:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1960 transitions. [2022-07-13 21:57:57,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095828170177612 [2022-07-13 21:57:57,736 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1960 transitions. [2022-07-13 21:57:57,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1960 transitions. [2022-07-13 21:57:57,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:57,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1960 transitions. [2022-07-13 21:57:57,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.77777777777777) internal successors, (1960), 9 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,744 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,745 INFO L186 Difference]: Start difference. First operand has 231 places, 228 transitions, 492 flow. Second operand 9 states and 1960 transitions. [2022-07-13 21:57:57,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 238 transitions, 560 flow [2022-07-13 21:57:57,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 238 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:57,749 INFO L242 Difference]: Finished difference. Result has 241 places, 234 transitions, 540 flow [2022-07-13 21:57:57,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=241, PETRI_TRANSITIONS=234} [2022-07-13 21:57:57,750 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 12 predicate places. [2022-07-13 21:57:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 234 transitions, 540 flow [2022-07-13 21:57:57,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:57,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:57,751 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-13 21:57:57,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 21:57:57,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:57,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -412502595, now seen corresponding path program 2 times [2022-07-13 21:57:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:57,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502125912] [2022-07-13 21:57:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:58,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:58,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502125912] [2022-07-13 21:57:58,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502125912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566728849] [2022-07-13 21:57:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:57:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:58,068 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) [2022-07-13 21:57:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:57:58,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:57:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:57:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:58,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566728849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:58,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492514171] [2022-07-13 21:57:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:58,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-13 21:57:58,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 234 transitions, 540 flow. Second operand has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:58,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-13 21:57:58,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:58,536 INFO L129 PetriNetUnfolder]: 7/352 cut-off events. [2022-07-13 21:57:58,537 INFO L130 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2022-07-13 21:57:58,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 352 events. 7/352 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 4/342 useless extension candidates. Maximal degree in co-relation 466. Up to 11 conditions per place. [2022-07-13 21:57:58,542 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 22 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-07-13 21:57:58,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 258 transitions, 734 flow [2022-07-13 21:57:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4562 transitions. [2022-07-13 21:57:58,552 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8075765622234023 [2022-07-13 21:57:58,552 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4562 transitions. [2022-07-13 21:57:58,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4562 transitions. [2022-07-13 21:57:58,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:58,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4562 transitions. [2022-07-13 21:57:58,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 217.23809523809524) internal successors, (4562), 21 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,573 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,573 INFO L186 Difference]: Start difference. First operand has 241 places, 234 transitions, 540 flow. Second operand 21 states and 4562 transitions. [2022-07-13 21:57:58,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 258 transitions, 734 flow [2022-07-13 21:57:58,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 720 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:58,579 INFO L242 Difference]: Finished difference. Result has 265 places, 247 transitions, 664 flow [2022-07-13 21:57:58,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=664, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-07-13 21:57:58,580 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 36 predicate places. [2022-07-13 21:57:58,580 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 664 flow [2022-07-13 21:57:58,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:58,582 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-13 21:57:58,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:58,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:58,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2002198147, now seen corresponding path program 3 times [2022-07-13 21:57:58,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130011440] [2022-07-13 21:57:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:58,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:58,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130011440] [2022-07-13 21:57:58,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130011440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:58,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436973078] [2022-07-13 21:57:58,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:57:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:58,948 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) [2022-07-13 21:57:58,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:57:59,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:57:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:57:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:59,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 21:57:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436973078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:59,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:59,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:57:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485231047] [2022-07-13 21:57:59,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:59,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:57:59,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:57:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:57:59,244 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-13 21:57:59,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 664 flow. Second operand has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:59,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:59,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-13 21:57:59,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:59,582 INFO L129 PetriNetUnfolder]: 7/367 cut-off events. [2022-07-13 21:57:59,583 INFO L130 PetriNetUnfolder]: For 127/131 co-relation queries the response was YES. [2022-07-13 21:57:59,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 367 events. 7/367 cut-off events. For 127/131 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 562. Up to 17 conditions per place. [2022-07-13 21:57:59,588 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 28 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2022-07-13 21:57:59,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 926 flow [2022-07-13 21:57:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:57:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:57:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6511 transitions. [2022-07-13 21:57:59,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8068153655514251 [2022-07-13 21:57:59,596 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6511 transitions. [2022-07-13 21:57:59,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6511 transitions. [2022-07-13 21:57:59,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:59,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6511 transitions. [2022-07-13 21:57:59,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 217.03333333333333) internal successors, (6511), 30 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:59,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:59,624 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:59,624 INFO L186 Difference]: Start difference. First operand has 265 places, 247 transitions, 664 flow. Second operand 30 states and 6511 transitions. [2022-07-13 21:57:59,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 926 flow [2022-07-13 21:57:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 273 transitions, 896 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:59,631 INFO L242 Difference]: Finished difference. Result has 292 places, 257 transitions, 792 flow [2022-07-13 21:57:59,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=792, PETRI_PLACES=292, PETRI_TRANSITIONS=257} [2022-07-13 21:57:59,633 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 63 predicate places. [2022-07-13 21:57:59,633 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 257 transitions, 792 flow [2022-07-13 21:57:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:59,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:59,635 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-13 21:57:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 21:57:59,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-13 21:57:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1312549664, now seen corresponding path program 4 times [2022-07-13 21:57:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:59,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804120940] [2022-07-13 21:57:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:59,880 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:59,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:59,909 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:59,909 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:57:59,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:57:59,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-13 21:57:59,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:57:59,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:57:59,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:57:59,910 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-13 21:57:59,911 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:59,911 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:57:59,938 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:57:59,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-07-13 21:58:00,022 INFO L129 PetriNetUnfolder]: 110/640 cut-off events. [2022-07-13 21:58:00,022 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-13 21:58:00,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2841 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-07-13 21:58:00,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-07-13 21:58:00,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-07-13 21:58:00,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:00,043 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@17c05519, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7af95e51 [2022-07-13 21:58:00,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:58:00,049 INFO L129 PetriNetUnfolder]: 15/139 cut-off events. [2022-07-13 21:58:00,049 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:58:00,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:00,049 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] [2022-07-13 21:58:00,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 936600048, now seen corresponding path program 1 times [2022-07-13 21:58:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780267568] [2022-07-13 21:58:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:00,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:00,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780267568] [2022-07-13 21:58:00,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780267568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:00,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:00,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:58:00,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348600851] [2022-07-13 21:58:00,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:00,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:58:00,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:58:00,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:58:00,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 341 [2022-07-13 21:58:00,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 341 transitions, 712 flow. Second operand has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:00,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 341 [2022-07-13 21:58:00,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:00,143 INFO L129 PetriNetUnfolder]: 16/539 cut-off events. [2022-07-13 21:58:00,143 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-13 21:58:00,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 539 events. 16/539 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2476 event pairs, 1 based on Foata normal form. 209/717 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2022-07-13 21:58:00,153 INFO L132 encePairwiseOnDemand]: 290/341 looper letters, 6 selfloop transitions, 0 changer transitions 1/286 dead transitions. [2022-07-13 21:58:00,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 286 transitions, 614 flow [2022-07-13 21:58:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:58:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:58:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-07-13 21:58:00,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9046920821114369 [2022-07-13 21:58:00,155 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-07-13 21:58:00,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-07-13 21:58:00,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:00,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-07-13 21:58:00,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,157 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,157 INFO L186 Difference]: Start difference. First operand has 289 places, 341 transitions, 712 flow. Second operand 2 states and 617 transitions. [2022-07-13 21:58:00,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 286 transitions, 614 flow [2022-07-13 21:58:00,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 286 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:00,162 INFO L242 Difference]: Finished difference. Result has 286 places, 285 transitions, 600 flow [2022-07-13 21:58:00,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=600, PETRI_PLACES=286, PETRI_TRANSITIONS=285} [2022-07-13 21:58:00,163 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -3 predicate places. [2022-07-13 21:58:00,163 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 285 transitions, 600 flow [2022-07-13 21:58:00,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,164 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:00,164 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] [2022-07-13 21:58:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:58:00,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1898214065, now seen corresponding path program 1 times [2022-07-13 21:58:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:00,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807739694] [2022-07-13 21:58:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:00,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807739694] [2022-07-13 21:58:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807739694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:00,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:00,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908293766] [2022-07-13 21:58:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:00,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:00,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-13 21:58:00,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 285 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:00,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-13 21:58:00,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:00,277 INFO L129 PetriNetUnfolder]: 16/542 cut-off events. [2022-07-13 21:58:00,277 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-13 21:58:00,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 542 events. 16/542 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2473 event pairs, 1 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 592. Up to 23 conditions per place. [2022-07-13 21:58:00,287 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-07-13 21:58:00,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 289 transitions, 642 flow [2022-07-13 21:58:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-13 21:58:00,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-13 21:58:00,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:00,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,292 INFO L186 Difference]: Start difference. First operand has 286 places, 285 transitions, 600 flow. Second operand 3 states and 837 transitions. [2022-07-13 21:58:00,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 289 transitions, 642 flow [2022-07-13 21:58:00,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 289 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:00,297 INFO L242 Difference]: Finished difference. Result has 288 places, 286 transitions, 612 flow [2022-07-13 21:58:00,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=288, PETRI_TRANSITIONS=286} [2022-07-13 21:58:00,298 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -1 predicate places. [2022-07-13 21:58:00,298 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 286 transitions, 612 flow [2022-07-13 21:58:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:00,299 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] [2022-07-13 21:58:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:58:00,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -163255965, now seen corresponding path program 1 times [2022-07-13 21:58:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:00,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773854189] [2022-07-13 21:58:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:00,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773854189] [2022-07-13 21:58:00,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773854189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162454625] [2022-07-13 21:58:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:00,327 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) [2022-07-13 21:58:00,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:58:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:58:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:00,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:58:00,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162454625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:00,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:58:00,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 21:58:00,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509195571] [2022-07-13 21:58:00,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:00,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:58:00,429 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-13 21:58:00,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 286 transitions, 612 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:00,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-13 21:58:00,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:00,535 INFO L129 PetriNetUnfolder]: 14/497 cut-off events. [2022-07-13 21:58:00,535 INFO L130 PetriNetUnfolder]: For 62/152 co-relation queries the response was YES. [2022-07-13 21:58:00,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 497 events. 14/497 cut-off events. For 62/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2138 event pairs, 1 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 560. Up to 30 conditions per place. [2022-07-13 21:58:00,543 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-07-13 21:58:00,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 290 transitions, 654 flow [2022-07-13 21:58:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-13 21:58:00,545 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-13 21:58:00,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:00,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-13 21:58:00,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,550 INFO L186 Difference]: Start difference. First operand has 288 places, 286 transitions, 612 flow. Second operand 3 states and 837 transitions. [2022-07-13 21:58:00,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 290 transitions, 654 flow [2022-07-13 21:58:00,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 290 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:00,555 INFO L242 Difference]: Finished difference. Result has 290 places, 287 transitions, 622 flow [2022-07-13 21:58:00,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=290, PETRI_TRANSITIONS=287} [2022-07-13 21:58:00,557 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2022-07-13 21:58:00,557 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 287 transitions, 622 flow [2022-07-13 21:58:00,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:00,557 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] [2022-07-13 21:58:00,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:00,779 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,SelfDestructingSolverStorable16 [2022-07-13 21:58:00,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -522046394, now seen corresponding path program 1 times [2022-07-13 21:58:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120182021] [2022-07-13 21:58:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:00,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:00,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120182021] [2022-07-13 21:58:00,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120182021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:00,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781832808] [2022-07-13 21:58:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:00,809 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) [2022-07-13 21:58:00,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:58:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:00,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781832808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:00,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673742442] [2022-07-13 21:58:00,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:00,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:00,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:00,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-13 21:58:00,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 287 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:00,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:00,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-13 21:58:00,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:01,093 INFO L129 PetriNetUnfolder]: 14/504 cut-off events. [2022-07-13 21:58:01,094 INFO L130 PetriNetUnfolder]: For 54/69 co-relation queries the response was YES. [2022-07-13 21:58:01,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 504 events. 14/504 cut-off events. For 54/69 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2133 event pairs, 1 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 575. Up to 20 conditions per place. [2022-07-13 21:58:01,103 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 16 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-13 21:58:01,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 694 flow [2022-07-13 21:58:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2475 transitions. [2022-07-13 21:58:01,106 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-13 21:58:01,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2475 transitions. [2022-07-13 21:58:01,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2475 transitions. [2022-07-13 21:58:01,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:01,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2475 transitions. [2022-07-13 21:58:01,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.0) internal successors, (2475), 9 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,114 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,115 INFO L186 Difference]: Start difference. First operand has 290 places, 287 transitions, 622 flow. Second operand 9 states and 2475 transitions. [2022-07-13 21:58:01,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 694 flow [2022-07-13 21:58:01,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 297 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:01,121 INFO L242 Difference]: Finished difference. Result has 300 places, 293 transitions, 670 flow [2022-07-13 21:58:01,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2022-07-13 21:58:01,121 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 11 predicate places. [2022-07-13 21:58:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 670 flow [2022-07-13 21:58:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:01,123 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 21:58:01,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:01,347 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,SelfDestructingSolverStorable17 [2022-07-13 21:58:01,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2078839546, now seen corresponding path program 2 times [2022-07-13 21:58:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:01,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600258236] [2022-07-13 21:58:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:01,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 21:58:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600258236] [2022-07-13 21:58:01,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600258236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867028085] [2022-07-13 21:58:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:58:01,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:01,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:01,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:01,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:58:01,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:58:01,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:58:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:01,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:58:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867028085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:01,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:01,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-13 21:58:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514335367] [2022-07-13 21:58:01,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:58:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:58:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:58:01,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 341 [2022-07-13 21:58:01,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:01,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 341 [2022-07-13 21:58:01,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:01,972 INFO L129 PetriNetUnfolder]: 12/479 cut-off events. [2022-07-13 21:58:01,973 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-13 21:58:01,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 479 events. 12/479 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1720 event pairs, 2 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 636. Up to 29 conditions per place. [2022-07-13 21:58:01,983 INFO L132 encePairwiseOnDemand]: 330/341 looper letters, 35 selfloop transitions, 26 changer transitions 0/325 dead transitions. [2022-07-13 21:58:01,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 325 transitions, 918 flow [2022-07-13 21:58:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:58:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:58:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6691 transitions. [2022-07-13 21:58:01,992 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7848680351906159 [2022-07-13 21:58:01,992 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6691 transitions. [2022-07-13 21:58:01,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6691 transitions. [2022-07-13 21:58:01,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:01,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6691 transitions. [2022-07-13 21:58:02,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 267.64) internal successors, (6691), 25 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:02,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:02,013 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:02,013 INFO L186 Difference]: Start difference. First operand has 300 places, 293 transitions, 670 flow. Second operand 25 states and 6691 transitions. [2022-07-13 21:58:02,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 325 transitions, 918 flow [2022-07-13 21:58:02,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 325 transitions, 904 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:02,020 INFO L242 Difference]: Finished difference. Result has 331 places, 309 transitions, 828 flow [2022-07-13 21:58:02,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=828, PETRI_PLACES=331, PETRI_TRANSITIONS=309} [2022-07-13 21:58:02,021 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 42 predicate places. [2022-07-13 21:58:02,021 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 309 transitions, 828 flow [2022-07-13 21:58:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:02,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:02,023 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:02,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:02,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -497132495, now seen corresponding path program 1 times [2022-07-13 21:58:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:02,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702807743] [2022-07-13 21:58:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702807743] [2022-07-13 21:58:02,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702807743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084189666] [2022-07-13 21:58:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:02,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:02,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:58:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:02,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084189666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:02,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-13 21:58:02,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23830875] [2022-07-13 21:58:02,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:58:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:02,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:58:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-13 21:58:02,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-13 21:58:02,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 309 transitions, 828 flow. Second operand has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:02,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:02,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-13 21:58:02,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:03,078 INFO L129 PetriNetUnfolder]: 12/494 cut-off events. [2022-07-13 21:58:03,078 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-13 21:58:03,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 494 events. 12/494 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1721 event pairs, 2 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 728. Up to 20 conditions per place. [2022-07-13 21:58:03,088 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 30 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2022-07-13 21:58:03,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 335 transitions, 1094 flow [2022-07-13 21:58:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:58:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:58:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8223 transitions. [2022-07-13 21:58:03,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038123167155425 [2022-07-13 21:58:03,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8223 transitions. [2022-07-13 21:58:03,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8223 transitions. [2022-07-13 21:58:03,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:03,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8223 transitions. [2022-07-13 21:58:03,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 274.1) internal successors, (8223), 30 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:03,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:03,147 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:03,147 INFO L186 Difference]: Start difference. First operand has 331 places, 309 transitions, 828 flow. Second operand 30 states and 8223 transitions. [2022-07-13 21:58:03,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 335 transitions, 1094 flow [2022-07-13 21:58:03,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 335 transitions, 1060 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-13 21:58:03,155 INFO L242 Difference]: Finished difference. Result has 357 places, 319 transitions, 952 flow [2022-07-13 21:58:03,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=952, PETRI_PLACES=357, PETRI_TRANSITIONS=319} [2022-07-13 21:58:03,157 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 68 predicate places. [2022-07-13 21:58:03,157 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 319 transitions, 952 flow [2022-07-13 21:58:03,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:03,158 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:03,159 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:03,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:03,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:03,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:58:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash 28146467, now seen corresponding path program 2 times [2022-07-13 21:58:03,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:03,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658153208] [2022-07-13 21:58:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:03,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 21:58:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658153208] [2022-07-13 21:58:03,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658153208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:03,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:03,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 21:58:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011858761] [2022-07-13 21:58:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:58:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:58:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:58:03,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 341 [2022-07-13 21:58:03,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 319 transitions, 952 flow. Second operand has 13 states, 13 states have (on average 203.23076923076923) internal successors, (2642), 13 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:03,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:03,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 341 [2022-07-13 21:58:03,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand