./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_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_12-ptr_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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:56:27,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:56:27,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:56:27,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:56:27,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:56:27,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:56:27,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:56:27,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:56:27,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:56:27,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:56:27,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:56:27,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:56:27,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:56:27,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:56:27,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:56:27,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:56:27,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:56:27,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:56:27,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:56:27,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:56:27,252 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:56:27,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:56:27,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:56:27,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:56:27,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:56:27,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:56:27,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:56:27,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:56:27,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:56:27,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:56:27,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:56:27,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:56:27,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:56:27,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:56:27,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:56:27,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:56:27,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:56:27,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:56:27,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:56:27,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:56:27,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:56:27,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:56:27,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:56:27,279 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:56:27,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:56:27,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:56:27,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:56:27,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:56:27,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:56:27,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:56:27,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:56:27,282 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:56:27,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:56:27,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:56:27,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:56:27,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:56:27,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:56:27,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:56:27,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:56:27,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:56:27,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:56:27,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:56:27,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:27,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:56:27,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:56:27,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:56:27,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:56:27,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:56:27,286 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:56:27,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:56:27,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:56:27,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-07-13 21:56:27,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:56:27,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:56:27,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:56:27,513 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:56:27,525 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:56:27,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-07-13 21:56:27,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a39029fb/ef84327285cd45178bf8375ea6bee69f/FLAG205d5c6fd [2022-07-13 21:56:27,969 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:56:27,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-07-13 21:56:27,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a39029fb/ef84327285cd45178bf8375ea6bee69f/FLAG205d5c6fd [2022-07-13 21:56:28,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a39029fb/ef84327285cd45178bf8375ea6bee69f [2022-07-13 21:56:28,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:56:28,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:56:28,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:28,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:56:28,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:56:28,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd4469d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28, skipping insertion in model container [2022-07-13 21:56:28,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:56:28,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:56:28,682 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_12-ptr_racefree.i[30176,30189] [2022-07-13 21:56:28,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:28,710 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:56:28,742 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_12-ptr_racefree.i[30176,30189] [2022-07-13 21:56:28,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:28,791 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:56:28,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28 WrapperNode [2022-07-13 21:56:28,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:28,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:28,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:56:28,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:56:28,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,844 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-13 21:56:28,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:28,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:56:28,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:56:28,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:56:28,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:56:28,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:56:28,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:56:28,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:56:28,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (1/1) ... [2022-07-13 21:56:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:28,901 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 21:56:28,908 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 21:56:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:56:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:56:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:56:28,935 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:56:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:56:28,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:56:28,936 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 21:56:29,041 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:56:29,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:56:29,214 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:56:29,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:56:29,220 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-13 21:56:29,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:29 BoogieIcfgContainer [2022-07-13 21:56:29,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:56:29,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:56:29,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:56:29,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:56:29,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:56:28" (1/3) ... [2022-07-13 21:56:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6ae6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:29, skipping insertion in model container [2022-07-13 21:56:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:28" (2/3) ... [2022-07-13 21:56:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6ae6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:29, skipping insertion in model container [2022-07-13 21:56:29,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:29" (3/3) ... [2022-07-13 21:56:29,227 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-07-13 21:56:29,232 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:56:29,247 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:56:29,248 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:56:29,248 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:56:29,296 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:56:29,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-07-13 21:56:29,376 INFO L129 PetriNetUnfolder]: 17/161 cut-off events. [2022-07-13 21:56:29,376 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:29,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 17/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 384 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-07-13 21:56:29,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-07-13 21:56:29,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2022-07-13 21:56:29,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:29,396 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:29,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:29,416 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-13 21:56:29,416 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:29,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,417 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] [2022-07-13 21:56:29,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash -41465577, now seen corresponding path program 1 times [2022-07-13 21:56:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061788395] [2022-07-13 21:56:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:29,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061788395] [2022-07-13 21:56:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061788395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:29,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45178877] [2022-07-13 21:56:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:29,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 123 [2022-07-13 21:56:29,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 241 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:29,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 123 [2022-07-13 21:56:29,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:29,648 INFO L129 PetriNetUnfolder]: 0/138 cut-off events. [2022-07-13 21:56:29,649 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:29,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 138 events. 0/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 215 event pairs, 0 based on Foata normal form. 16/148 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-13 21:56:29,650 INFO L132 encePairwiseOnDemand]: 112/123 looper letters, 1 selfloop transitions, 0 changer transitions 16/106 dead transitions. [2022-07-13 21:56:29,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 219 flow [2022-07-13 21:56:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2022-07-13 21:56:29,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-07-13 21:56:29,660 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2022-07-13 21:56:29,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2022-07-13 21:56:29,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:29,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2022-07-13 21:56:29,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,668 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,669 INFO L186 Difference]: Start difference. First operand has 110 places, 118 transitions, 241 flow. Second operand 2 states and 230 transitions. [2022-07-13 21:56:29,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 219 flow [2022-07-13 21:56:29,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 106 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:29,674 INFO L242 Difference]: Finished difference. Result has 110 places, 90 transitions, 185 flow [2022-07-13 21:56:29,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=110, PETRI_TRANSITIONS=90} [2022-07-13 21:56:29,678 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-07-13 21:56:29,678 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 90 transitions, 185 flow [2022-07-13 21:56:29,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,679 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,679 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] [2022-07-13 21:56:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:56:29,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 87617142, now seen corresponding path program 1 times [2022-07-13 21:56:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516952109] [2022-07-13 21:56:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516952109] [2022-07-13 21:56:29,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516952109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:29,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:29,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:29,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919046727] [2022-07-13 21:56:29,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:29,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 123 [2022-07-13 21:56:29,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 90 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:29,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 123 [2022-07-13 21:56:29,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:29,772 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2022-07-13 21:56:29,772 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:29,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 0/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 21:56:29,773 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 8 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-07-13 21:56:29,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 209 flow [2022-07-13 21:56:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-07-13 21:56:29,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8590785907859079 [2022-07-13 21:56:29,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-07-13 21:56:29,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-07-13 21:56:29,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:29,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-07-13 21:56:29,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,779 INFO L186 Difference]: Start difference. First operand has 110 places, 90 transitions, 185 flow. Second operand 3 states and 317 transitions. [2022-07-13 21:56:29,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 209 flow [2022-07-13 21:56:29,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:29,781 INFO L242 Difference]: Finished difference. Result has 97 places, 90 transitions, 193 flow [2022-07-13 21:56:29,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-07-13 21:56:29,782 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, -13 predicate places. [2022-07-13 21:56:29,782 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 193 flow [2022-07-13 21:56:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,783 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 21:56:29,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:56:29,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -228267936, now seen corresponding path program 1 times [2022-07-13 21:56:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740487773] [2022-07-13 21:56:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:29,831 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:29,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:29,880 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:29,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:56:29,883 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:29,885 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:29,885 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:56:29,900 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:56:29,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-07-13 21:56:29,928 INFO L129 PetriNetUnfolder]: 31/259 cut-off events. [2022-07-13 21:56:29,928 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:29,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 31/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 773 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2022-07-13 21:56:29,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-07-13 21:56:29,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-07-13 21:56:29,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:29,934 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:29,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:29,942 INFO L129 PetriNetUnfolder]: 5/96 cut-off events. [2022-07-13 21:56:29,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:29,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:29,943 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] [2022-07-13 21:56:29,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2129631895, now seen corresponding path program 1 times [2022-07-13 21:56:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985640170] [2022-07-13 21:56:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:29,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985640170] [2022-07-13 21:56:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985640170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:29,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685394097] [2022-07-13 21:56:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:29,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:29,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 158 [2022-07-13 21:56:29,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 334 flow. Second operand has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:29,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:29,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 158 [2022-07-13 21:56:29,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:30,016 INFO L129 PetriNetUnfolder]: 3/228 cut-off events. [2022-07-13 21:56:30,016 INFO L130 PetriNetUnfolder]: For 20/26 co-relation queries the response was YES. [2022-07-13 21:56:30,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 228 events. 3/228 cut-off events. For 20/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 575 event pairs, 0 based on Foata normal form. 42/260 useless extension candidates. Maximal degree in co-relation 147. Up to 7 conditions per place. [2022-07-13 21:56:30,017 INFO L132 encePairwiseOnDemand]: 141/158 looper letters, 2 selfloop transitions, 0 changer transitions 22/140 dead transitions. [2022-07-13 21:56:30,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 140 transitions, 306 flow [2022-07-13 21:56:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-07-13 21:56:30,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9272151898734177 [2022-07-13 21:56:30,020 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-07-13 21:56:30,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-07-13 21:56:30,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:30,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-07-13 21:56:30,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,022 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,022 INFO L186 Difference]: Start difference. First operand has 144 places, 158 transitions, 334 flow. Second operand 2 states and 293 transitions. [2022-07-13 21:56:30,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 140 transitions, 306 flow [2022-07-13 21:56:30,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:30,025 INFO L242 Difference]: Finished difference. Result has 144 places, 118 transitions, 248 flow [2022-07-13 21:56:30,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=144, PETRI_TRANSITIONS=118} [2022-07-13 21:56:30,026 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2022-07-13 21:56:30,026 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 118 transitions, 248 flow [2022-07-13 21:56:30,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,027 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,027 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] [2022-07-13 21:56:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:56:30,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2036252682, now seen corresponding path program 1 times [2022-07-13 21:56:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627531497] [2022-07-13 21:56:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:30,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627531497] [2022-07-13 21:56:30,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627531497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:30,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:30,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282579951] [2022-07-13 21:56:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:30,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 158 [2022-07-13 21:56:30,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 118 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:30,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 158 [2022-07-13 21:56:30,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:30,111 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2022-07-13 21:56:30,111 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:56:30,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 143 events. 0/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-13 21:56:30,112 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 11 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2022-07-13 21:56:30,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 282 flow [2022-07-13 21:56:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-07-13 21:56:30,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459915611814346 [2022-07-13 21:56:30,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-07-13 21:56:30,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-07-13 21:56:30,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:30,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-07-13 21:56:30,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,120 INFO L186 Difference]: Start difference. First operand has 144 places, 118 transitions, 248 flow. Second operand 3 states and 401 transitions. [2022-07-13 21:56:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 282 flow [2022-07-13 21:56:30,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 122 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:30,125 INFO L242 Difference]: Finished difference. Result has 127 places, 119 transitions, 258 flow [2022-07-13 21:56:30,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=127, PETRI_TRANSITIONS=119} [2022-07-13 21:56:30,127 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -17 predicate places. [2022-07-13 21:56:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 119 transitions, 258 flow [2022-07-13 21:56:30,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,128 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:56:30,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1109826934, now seen corresponding path program 1 times [2022-07-13 21:56:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678403031] [2022-07-13 21:56:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678403031] [2022-07-13 21:56:30,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678403031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339271902] [2022-07-13 21:56:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:30,228 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 21:56:30,228 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 21:56:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339271902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:30,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:30,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:30,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115206071] [2022-07-13 21:56:30,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:30,438 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 158 [2022-07-13 21:56:30,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 119 transitions, 258 flow. Second operand has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:30,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 158 [2022-07-13 21:56:30,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:30,507 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2022-07-13 21:56:30,507 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:56:30,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 119 events. 0/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-13 21:56:30,508 INFO L132 encePairwiseOnDemand]: 153/158 looper letters, 9 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2022-07-13 21:56:30,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 276 flow [2022-07-13 21:56:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1170 transitions. [2022-07-13 21:56:30,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8227848101265823 [2022-07-13 21:56:30,512 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1170 transitions. [2022-07-13 21:56:30,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1170 transitions. [2022-07-13 21:56:30,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:30,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1170 transitions. [2022-07-13 21:56:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 130.0) internal successors, (1170), 9 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,518 INFO L186 Difference]: Start difference. First operand has 127 places, 119 transitions, 258 flow. Second operand 9 states and 1170 transitions. [2022-07-13 21:56:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 276 flow [2022-07-13 21:56:30,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 113 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:30,522 INFO L242 Difference]: Finished difference. Result has 122 places, 109 transitions, 248 flow [2022-07-13 21:56:30,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=248, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2022-07-13 21:56:30,524 INFO L279 CegarLoopForPetriNet]: 144 programPoint places, -22 predicate places. [2022-07-13 21:56:30,525 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 248 flow [2022-07-13 21:56:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,526 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 21:56:30,575 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 21:56:30,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 21:56:30,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -253022611, now seen corresponding path program 1 times [2022-07-13 21:56:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290482216] [2022-07-13 21:56:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:30,787 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:30,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:30,821 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:30,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:30,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:56:30,821 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:56:30,822 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:30,822 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:56:30,858 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:56:30,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-07-13 21:56:30,898 INFO L129 PetriNetUnfolder]: 50/390 cut-off events. [2022-07-13 21:56:30,899 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:56:30,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1329 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2022-07-13 21:56:30,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-07-13 21:56:30,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-07-13 21:56:30,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:30,912 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:30,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:30,917 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-13 21:56:30,919 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:30,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:30,919 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:30,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 622618071, now seen corresponding path program 1 times [2022-07-13 21:56:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:30,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452304360] [2022-07-13 21:56:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:30,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452304360] [2022-07-13 21:56:30,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452304360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:30,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:30,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233196603] [2022-07-13 21:56:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:30,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:30,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 193 [2022-07-13 21:56:30,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 416 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:30,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:30,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 193 [2022-07-13 21:56:30,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,004 INFO L129 PetriNetUnfolder]: 8/344 cut-off events. [2022-07-13 21:56:31,004 INFO L130 PetriNetUnfolder]: For 55/69 co-relation queries the response was YES. [2022-07-13 21:56:31,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 344 events. 8/344 cut-off events. For 55/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1102 event pairs, 1 based on Foata normal form. 104/432 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2022-07-13 21:56:31,006 INFO L132 encePairwiseOnDemand]: 170/193 looper letters, 3 selfloop transitions, 0 changer transitions 23/169 dead transitions. [2022-07-13 21:56:31,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 380 flow [2022-07-13 21:56:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-07-13 21:56:31,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9196891191709845 [2022-07-13 21:56:31,008 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-07-13 21:56:31,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-07-13 21:56:31,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-07-13 21:56:31,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.5) internal successors, (355), 2 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,013 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,013 INFO L186 Difference]: Start difference. First operand has 174 places, 193 transitions, 416 flow. Second operand 2 states and 355 transitions. [2022-07-13 21:56:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 380 flow [2022-07-13 21:56:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:31,016 INFO L242 Difference]: Finished difference. Result has 174 places, 146 transitions, 313 flow [2022-07-13 21:56:31,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=313, PETRI_PLACES=174, PETRI_TRANSITIONS=146} [2022-07-13 21:56:31,018 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2022-07-13 21:56:31,018 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 146 transitions, 313 flow [2022-07-13 21:56:31,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,019 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] [2022-07-13 21:56:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:56:31,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash 751700790, now seen corresponding path program 1 times [2022-07-13 21:56:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16197549] [2022-07-13 21:56:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:31,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16197549] [2022-07-13 21:56:31,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16197549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:31,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:31,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:31,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983411097] [2022-07-13 21:56:31,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:31,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:31,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 193 [2022-07-13 21:56:31,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 146 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:31,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 193 [2022-07-13 21:56:31,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,103 INFO L129 PetriNetUnfolder]: 0/192 cut-off events. [2022-07-13 21:56:31,104 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:56:31,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 192 events. 0/192 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 399 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-13 21:56:31,105 INFO L132 encePairwiseOnDemand]: 190/193 looper letters, 12 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2022-07-13 21:56:31,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 150 transitions, 349 flow [2022-07-13 21:56:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-07-13 21:56:31,106 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8341968911917098 [2022-07-13 21:56:31,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-07-13 21:56:31,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-07-13 21:56:31,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-07-13 21:56:31,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,109 INFO L186 Difference]: Start difference. First operand has 174 places, 146 transitions, 313 flow. Second operand 3 states and 483 transitions. [2022-07-13 21:56:31,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 150 transitions, 349 flow [2022-07-13 21:56:31,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:31,112 INFO L242 Difference]: Finished difference. Result has 157 places, 147 transitions, 319 flow [2022-07-13 21:56:31,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=157, PETRI_TRANSITIONS=147} [2022-07-13 21:56:31,113 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -17 predicate places. [2022-07-13 21:56:31,114 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 147 transitions, 319 flow [2022-07-13 21:56:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,114 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,114 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] [2022-07-13 21:56:31,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:56:31,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 6057065, now seen corresponding path program 1 times [2022-07-13 21:56:31,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876781410] [2022-07-13 21:56:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:31,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876781410] [2022-07-13 21:56:31,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876781410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810650990] [2022-07-13 21:56:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:31,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:31,176 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 21:56:31,177 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 21:56:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:31,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810650990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:31,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:31,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224286772] [2022-07-13 21:56:31,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:31,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:31,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 193 [2022-07-13 21:56:31,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 147 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:31,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 193 [2022-07-13 21:56:31,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,413 INFO L129 PetriNetUnfolder]: 0/168 cut-off events. [2022-07-13 21:56:31,413 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 21:56:31,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 168 events. 0/168 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 255 event pairs, 0 based on Foata normal form. 2/170 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-13 21:56:31,414 INFO L132 encePairwiseOnDemand]: 187/193 looper letters, 13 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-07-13 21:56:31,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 157 transitions, 385 flow [2022-07-13 21:56:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1419 transitions. [2022-07-13 21:56:31,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8169257340241797 [2022-07-13 21:56:31,417 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1419 transitions. [2022-07-13 21:56:31,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1419 transitions. [2022-07-13 21:56:31,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1419 transitions. [2022-07-13 21:56:31,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.66666666666666) internal successors, (1419), 9 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,423 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,423 INFO L186 Difference]: Start difference. First operand has 157 places, 147 transitions, 319 flow. Second operand 9 states and 1419 transitions. [2022-07-13 21:56:31,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 157 transitions, 385 flow [2022-07-13 21:56:31,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 157 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:31,426 INFO L242 Difference]: Finished difference. Result has 167 places, 153 transitions, 367 flow [2022-07-13 21:56:31,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=167, PETRI_TRANSITIONS=153} [2022-07-13 21:56:31,427 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -7 predicate places. [2022-07-13 21:56:31,427 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 153 transitions, 367 flow [2022-07-13 21:56:31,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,428 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:31,461 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 21:56:31,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 21:56:31,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1094259264, now seen corresponding path program 1 times [2022-07-13 21:56:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013226743] [2022-07-13 21:56:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:31,684 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:31,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:31,730 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:31,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:31,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:56:31,731 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:56:31,731 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:31,731 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:56:31,747 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:56:31,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-07-13 21:56:31,802 INFO L129 PetriNetUnfolder]: 81/589 cut-off events. [2022-07-13 21:56:31,802 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:56:31,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 589 events. 81/589 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2294 event pairs, 6 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2022-07-13 21:56:31,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-07-13 21:56:31,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-07-13 21:56:31,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:31,813 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:31,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:31,819 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2022-07-13 21:56:31,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:31,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,819 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] [2022-07-13 21:56:31,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash -267539753, now seen corresponding path program 1 times [2022-07-13 21:56:31,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261087294] [2022-07-13 21:56:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261087294] [2022-07-13 21:56:31,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261087294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:31,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:31,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957780689] [2022-07-13 21:56:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:31,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:31,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 228 [2022-07-13 21:56:31,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 228 transitions, 500 flow. Second operand has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:31,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 228 [2022-07-13 21:56:31,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,901 INFO L129 PetriNetUnfolder]: 21/524 cut-off events. [2022-07-13 21:56:31,901 INFO L130 PetriNetUnfolder]: For 126/140 co-relation queries the response was YES. [2022-07-13 21:56:31,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 524 events. 21/524 cut-off events. For 126/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2086 event pairs, 6 based on Foata normal form. 248/746 useless extension candidates. Maximal degree in co-relation 379. Up to 37 conditions per place. [2022-07-13 21:56:31,905 INFO L132 encePairwiseOnDemand]: 199/228 looper letters, 4 selfloop transitions, 0 changer transitions 24/198 dead transitions. [2022-07-13 21:56:31,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 198 transitions, 456 flow [2022-07-13 21:56:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 417 transitions. [2022-07-13 21:56:31,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9144736842105263 [2022-07-13 21:56:31,907 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 417 transitions. [2022-07-13 21:56:31,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 417 transitions. [2022-07-13 21:56:31,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 417 transitions. [2022-07-13 21:56:31,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 208.5) internal successors, (417), 2 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,909 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,909 INFO L186 Difference]: Start difference. First operand has 204 places, 228 transitions, 500 flow. Second operand 2 states and 417 transitions. [2022-07-13 21:56:31,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 198 transitions, 456 flow [2022-07-13 21:56:31,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 198 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:31,922 INFO L242 Difference]: Finished difference. Result has 204 places, 174 transitions, 380 flow [2022-07-13 21:56:31,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=380, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2022-07-13 21:56:31,923 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2022-07-13 21:56:31,923 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 380 flow [2022-07-13 21:56:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,924 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,924 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] [2022-07-13 21:56:31,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:56:31,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -138457034, now seen corresponding path program 1 times [2022-07-13 21:56:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595191273] [2022-07-13 21:56:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595191273] [2022-07-13 21:56:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595191273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:31,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:31,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691397104] [2022-07-13 21:56:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:31,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:31,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:31,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 228 [2022-07-13 21:56:31,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:31,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 228 [2022-07-13 21:56:31,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:31,975 INFO L129 PetriNetUnfolder]: 0/241 cut-off events. [2022-07-13 21:56:31,976 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:56:31,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 241 events. 0/241 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-13 21:56:31,977 INFO L132 encePairwiseOnDemand]: 225/228 looper letters, 13 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2022-07-13 21:56:31,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 418 flow [2022-07-13 21:56:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-07-13 21:56:31,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8260233918128655 [2022-07-13 21:56:31,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-07-13 21:56:31,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-07-13 21:56:31,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:31,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-07-13 21:56:31,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,981 INFO L186 Difference]: Start difference. First operand has 204 places, 174 transitions, 380 flow. Second operand 3 states and 565 transitions. [2022-07-13 21:56:31,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 418 flow [2022-07-13 21:56:31,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 406 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:31,984 INFO L242 Difference]: Finished difference. Result has 187 places, 175 transitions, 380 flow [2022-07-13 21:56:31,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=187, PETRI_TRANSITIONS=175} [2022-07-13 21:56:31,984 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -17 predicate places. [2022-07-13 21:56:31,985 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 175 transitions, 380 flow [2022-07-13 21:56:31,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:31,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:31,985 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] [2022-07-13 21:56:31,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:56:31,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1594287592, now seen corresponding path program 1 times [2022-07-13 21:56:31,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668606257] [2022-07-13 21:56:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:31,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:32,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668606257] [2022-07-13 21:56:32,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668606257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:32,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379740038] [2022-07-13 21:56:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:32,013 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 21:56:32,014 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 21:56:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379740038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:32,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:32,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321920689] [2022-07-13 21:56:32,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:32,136 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-13 21:56:32,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 175 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:32,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-13 21:56:32,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:32,202 INFO L129 PetriNetUnfolder]: 0/217 cut-off events. [2022-07-13 21:56:32,202 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:32,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 217 events. 0/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 440 event pairs, 0 based on Foata normal form. 2/219 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-13 21:56:32,203 INFO L132 encePairwiseOnDemand]: 222/228 looper letters, 14 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-07-13 21:56:32,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 185 transitions, 448 flow [2022-07-13 21:56:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2022-07-13 21:56:32,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104288499025342 [2022-07-13 21:56:32,206 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2022-07-13 21:56:32,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2022-07-13 21:56:32,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:32,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2022-07-13 21:56:32,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,212 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 228.0) internal successors, (2280), 10 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,213 INFO L186 Difference]: Start difference. First operand has 187 places, 175 transitions, 380 flow. Second operand 9 states and 1663 transitions. [2022-07-13 21:56:32,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 185 transitions, 448 flow [2022-07-13 21:56:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 185 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:32,215 INFO L242 Difference]: Finished difference. Result has 197 places, 181 transitions, 428 flow [2022-07-13 21:56:32,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=197, PETRI_TRANSITIONS=181} [2022-07-13 21:56:32,216 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -7 predicate places. [2022-07-13 21:56:32,216 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 181 transitions, 428 flow [2022-07-13 21:56:32,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.3) internal successors, (1843), 10 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:32,218 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:32,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 21:56:32,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:32,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2107054441, now seen corresponding path program 1 times [2022-07-13 21:56:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130911085] [2022-07-13 21:56:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:32,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130911085] [2022-07-13 21:56:32,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130911085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:32,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376121504] [2022-07-13 21:56:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:32,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:32,524 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 21:56:32,525 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 21:56:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:32,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376121504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:32,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:32,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:32,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397115228] [2022-07-13 21:56:32,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:32,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:32,729 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 228 [2022-07-13 21:56:32,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 181 transitions, 428 flow. Second operand has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:32,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 228 [2022-07-13 21:56:32,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:32,838 INFO L129 PetriNetUnfolder]: 0/193 cut-off events. [2022-07-13 21:56:32,838 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-13 21:56:32,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 193 events. 0/193 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 21:56:32,839 INFO L132 encePairwiseOnDemand]: 223/228 looper letters, 15 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2022-07-13 21:56:32,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 179 transitions, 492 flow [2022-07-13 21:56:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:56:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 21:56:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2760 transitions. [2022-07-13 21:56:32,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8070175438596491 [2022-07-13 21:56:32,844 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2760 transitions. [2022-07-13 21:56:32,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2760 transitions. [2022-07-13 21:56:32,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:32,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2760 transitions. [2022-07-13 21:56:32,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,854 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,854 INFO L186 Difference]: Start difference. First operand has 197 places, 181 transitions, 428 flow. Second operand 15 states and 2760 transitions. [2022-07-13 21:56:32,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 179 transitions, 492 flow [2022-07-13 21:56:32,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 179 transitions, 475 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:32,857 INFO L242 Difference]: Finished difference. Result has 195 places, 172 transitions, 424 flow [2022-07-13 21:56:32,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=424, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2022-07-13 21:56:32,858 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -9 predicate places. [2022-07-13 21:56:32,858 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 424 flow [2022-07-13 21:56:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 184.61111111111111) internal successors, (3323), 18 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:32,860 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:32,860 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:32,880 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 21:56:33,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:56:33,076 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1678445639, now seen corresponding path program 1 times [2022-07-13 21:56:33,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:33,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751627949] [2022-07-13 21:56:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:33,089 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:33,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:33,103 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:33,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:33,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:33,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:56:33,103 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:33,104 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:33,104 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:56:33,124 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:56:33,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-07-13 21:56:33,255 INFO L129 PetriNetUnfolder]: 140/928 cut-off events. [2022-07-13 21:56:33,255 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:56:33,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 928 events. 140/928 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4372 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2022-07-13 21:56:33,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 263 transitions, 586 flow [2022-07-13 21:56:33,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 263 transitions, 586 flow [2022-07-13 21:56:33,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:33,278 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:33,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:33,282 INFO L129 PetriNetUnfolder]: 6/97 cut-off events. [2022-07-13 21:56:33,282 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:33,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:33,283 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] [2022-07-13 21:56:33,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -540841577, now seen corresponding path program 1 times [2022-07-13 21:56:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:33,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916428644] [2022-07-13 21:56:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:33,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916428644] [2022-07-13 21:56:33,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916428644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:33,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:33,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226856545] [2022-07-13 21:56:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:33,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 263 [2022-07-13 21:56:33,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 263 transitions, 586 flow. Second operand has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:33,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 263 [2022-07-13 21:56:33,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:33,429 INFO L129 PetriNetUnfolder]: 54/836 cut-off events. [2022-07-13 21:56:33,430 INFO L130 PetriNetUnfolder]: For 293/319 co-relation queries the response was YES. [2022-07-13 21:56:33,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 836 events. 54/836 cut-off events. For 293/319 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3952 event pairs, 23 based on Foata normal form. 574/1366 useless extension candidates. Maximal degree in co-relation 605. Up to 86 conditions per place. [2022-07-13 21:56:33,435 INFO L132 encePairwiseOnDemand]: 228/263 looper letters, 5 selfloop transitions, 0 changer transitions 25/227 dead transitions. [2022-07-13 21:56:33,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 227 transitions, 534 flow [2022-07-13 21:56:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-13 21:56:33,437 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9106463878326996 [2022-07-13 21:56:33,437 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-13 21:56:33,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-13 21:56:33,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:33,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-13 21:56:33,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,440 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,440 INFO L186 Difference]: Start difference. First operand has 234 places, 263 transitions, 586 flow. Second operand 2 states and 479 transitions. [2022-07-13 21:56:33,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 227 transitions, 534 flow [2022-07-13 21:56:33,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 227 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:33,443 INFO L242 Difference]: Finished difference. Result has 234 places, 202 transitions, 449 flow [2022-07-13 21:56:33,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=233, 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=449, PETRI_PLACES=234, PETRI_TRANSITIONS=202} [2022-07-13 21:56:33,444 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, 0 predicate places. [2022-07-13 21:56:33,444 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 202 transitions, 449 flow [2022-07-13 21:56:33,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:33,444 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] [2022-07-13 21:56:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:56:33,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash -411758858, now seen corresponding path program 1 times [2022-07-13 21:56:33,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:33,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889643757] [2022-07-13 21:56:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:33,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:33,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889643757] [2022-07-13 21:56:33,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889643757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:33,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:33,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541040332] [2022-07-13 21:56:33,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:33,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:33,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:33,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 263 [2022-07-13 21:56:33,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 202 transitions, 449 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:33,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 263 [2022-07-13 21:56:33,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:33,514 INFO L129 PetriNetUnfolder]: 0/290 cut-off events. [2022-07-13 21:56:33,514 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:56:33,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 290 events. 0/290 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 770 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-13 21:56:33,515 INFO L132 encePairwiseOnDemand]: 260/263 looper letters, 14 selfloop transitions, 2 changer transitions 0/206 dead transitions. [2022-07-13 21:56:33,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 206 transitions, 489 flow [2022-07-13 21:56:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-07-13 21:56:33,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8200253485424588 [2022-07-13 21:56:33,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-07-13 21:56:33,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-07-13 21:56:33,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:33,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-07-13 21:56:33,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,520 INFO L186 Difference]: Start difference. First operand has 234 places, 202 transitions, 449 flow. Second operand 3 states and 647 transitions. [2022-07-13 21:56:33,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 206 transitions, 489 flow [2022-07-13 21:56:33,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 206 transitions, 469 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:33,523 INFO L242 Difference]: Finished difference. Result has 217 places, 203 transitions, 441 flow [2022-07-13 21:56:33,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=217, PETRI_TRANSITIONS=203} [2022-07-13 21:56:33,524 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -17 predicate places. [2022-07-13 21:56:33,524 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 203 transitions, 441 flow [2022-07-13 21:56:33,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:33,525 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] [2022-07-13 21:56:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:56:33,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -640102649, now seen corresponding path program 1 times [2022-07-13 21:56:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136742396] [2022-07-13 21:56:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:33,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136742396] [2022-07-13 21:56:33,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136742396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496893267] [2022-07-13 21:56:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:33,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:33,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:33,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:33,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:56:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:33,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:33,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496893267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:33,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:33,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815165203] [2022-07-13 21:56:33,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:33,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:33,682 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-13 21:56:33,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 203 transitions, 441 flow. Second operand has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:33,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-13 21:56:33,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:33,773 INFO L129 PetriNetUnfolder]: 0/266 cut-off events. [2022-07-13 21:56:33,773 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:56:33,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 266 events. 0/266 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 624 event pairs, 0 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-13 21:56:33,774 INFO L132 encePairwiseOnDemand]: 257/263 looper letters, 15 selfloop transitions, 9 changer transitions 0/213 dead transitions. [2022-07-13 21:56:33,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 213 transitions, 511 flow [2022-07-13 21:56:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2022-07-13 21:56:33,778 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8056611744824672 [2022-07-13 21:56:33,778 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2022-07-13 21:56:33,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2022-07-13 21:56:33,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:33,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2022-07-13 21:56:33,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.88888888888889) internal successors, (1907), 9 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,785 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,785 INFO L186 Difference]: Start difference. First operand has 217 places, 203 transitions, 441 flow. Second operand 9 states and 1907 transitions. [2022-07-13 21:56:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 213 transitions, 511 flow [2022-07-13 21:56:33,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:33,788 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 489 flow [2022-07-13 21:56:33,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-07-13 21:56:33,789 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -7 predicate places. [2022-07-13 21:56:33,790 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 489 flow [2022-07-13 21:56:33,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 211.3) internal successors, (2113), 10 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:33,790 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:33,790 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:33,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:34,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1059240186, now seen corresponding path program 1 times [2022-07-13 21:56:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129896128] [2022-07-13 21:56:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:34,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:34,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129896128] [2022-07-13 21:56:34,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129896128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471274791] [2022-07-13 21:56:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:34,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:34,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:34,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:34,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:56:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:34,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:34,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471274791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:34,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:34,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921422110] [2022-07-13 21:56:34,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:34,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:34,280 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 263 [2022-07-13 21:56:34,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 489 flow. Second operand has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:34,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:34,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 263 [2022-07-13 21:56:34,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:34,405 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2022-07-13 21:56:34,405 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-13 21:56:34,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 230 events. 0/230 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 405 event pairs, 0 based on Foata normal form. 3/233 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-13 21:56:34,406 INFO L132 encePairwiseOnDemand]: 258/263 looper letters, 18 selfloop transitions, 16 changer transitions 0/212 dead transitions. [2022-07-13 21:56:34,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 212 transitions, 589 flow [2022-07-13 21:56:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:56:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:56:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3799 transitions. [2022-07-13 21:56:34,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024926066751161 [2022-07-13 21:56:34,412 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3799 transitions. [2022-07-13 21:56:34,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3799 transitions. [2022-07-13 21:56:34,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:34,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3799 transitions. [2022-07-13 21:56:34,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 211.05555555555554) internal successors, (3799), 18 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:34,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:34,425 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 263.0) internal successors, (4997), 19 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:34,425 INFO L186 Difference]: Start difference. First operand has 227 places, 209 transitions, 489 flow. Second operand 18 states and 3799 transitions. [2022-07-13 21:56:34,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 212 transitions, 589 flow [2022-07-13 21:56:34,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 212 transitions, 568 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:34,429 INFO L242 Difference]: Finished difference. Result has 228 places, 203 transitions, 504 flow [2022-07-13 21:56:34,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=203} [2022-07-13 21:56:34,430 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -6 predicate places. [2022-07-13 21:56:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 203 transitions, 504 flow [2022-07-13 21:56:34,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 211.61111111111111) internal successors, (3809), 18 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:34,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:34,431 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:34,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:34,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash -597627464, now seen corresponding path program 1 times [2022-07-13 21:56:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217631133] [2022-07-13 21:56:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:34,665 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:34,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:34,680 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:34,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:34,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:34,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:56:34,680 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:34,681 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:34,681 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-13 21:56:34,700 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-13 21:56:34,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 264 places, 298 transitions, 674 flow [2022-07-13 21:56:34,926 INFO L129 PetriNetUnfolder]: 263/1555 cut-off events. [2022-07-13 21:56:34,927 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-13 21:56:34,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 1555 events. 263/1555 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8892 event pairs, 72 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1027. Up to 192 conditions per place. [2022-07-13 21:56:34,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 298 transitions, 674 flow [2022-07-13 21:56:34,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 298 transitions, 674 flow [2022-07-13 21:56:34,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:34,955 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:34,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:34,959 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-13 21:56:34,959 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:34,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:34,960 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] [2022-07-13 21:56:34,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -197287401, now seen corresponding path program 1 times [2022-07-13 21:56:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823233635] [2022-07-13 21:56:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:34,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823233635] [2022-07-13 21:56:34,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823233635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:34,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:34,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:34,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475652181] [2022-07-13 21:56:34,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:34,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:34,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 298 [2022-07-13 21:56:34,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 298 transitions, 674 flow. Second operand has 2 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 21:56:34,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:34,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 298 [2022-07-13 21:56:34,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:35,223 INFO L129 PetriNetUnfolder]: 135/1420 cut-off events. [2022-07-13 21:56:35,224 INFO L130 PetriNetUnfolder]: For 651/675 co-relation queries the response was YES. [2022-07-13 21:56:35,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 1420 events. 135/1420 cut-off events. For 651/675 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8351 event pairs, 72 based on Foata normal form. 1306/2648 useless extension candidates. Maximal degree in co-relation 1020. Up to 199 conditions per place. [2022-07-13 21:56:35,234 INFO L132 encePairwiseOnDemand]: 257/298 looper letters, 6 selfloop transitions, 0 changer transitions 26/256 dead transitions. [2022-07-13 21:56:35,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 256 transitions, 614 flow [2022-07-13 21:56:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 541 transitions. [2022-07-13 21:56:35,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9077181208053692 [2022-07-13 21:56:35,235 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 541 transitions. [2022-07-13 21:56:35,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 541 transitions. [2022-07-13 21:56:35,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:35,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 541 transitions. [2022-07-13 21:56:35,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 270.5) internal successors, (541), 2 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,238 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,238 INFO L186 Difference]: Start difference. First operand has 264 places, 298 transitions, 674 flow. Second operand 2 states and 541 transitions. [2022-07-13 21:56:35,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 256 transitions, 614 flow [2022-07-13 21:56:35,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 256 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:35,242 INFO L242 Difference]: Finished difference. Result has 264 places, 230 transitions, 520 flow [2022-07-13 21:56:35,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=520, PETRI_PLACES=264, PETRI_TRANSITIONS=230} [2022-07-13 21:56:35,242 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, 0 predicate places. [2022-07-13 21:56:35,242 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 230 transitions, 520 flow [2022-07-13 21:56:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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 21:56:35,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,243 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] [2022-07-13 21:56:35,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:56:35,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -68204682, now seen corresponding path program 1 times [2022-07-13 21:56:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746846368] [2022-07-13 21:56:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:35,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746846368] [2022-07-13 21:56:35,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746846368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:35,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:35,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772085928] [2022-07-13 21:56:35,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:35,260 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 298 [2022-07-13 21:56:35,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 230 transitions, 520 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:35,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 298 [2022-07-13 21:56:35,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:35,309 INFO L129 PetriNetUnfolder]: 0/339 cut-off events. [2022-07-13 21:56:35,310 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-13 21:56:35,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 339 events. 0/339 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 954 event pairs, 0 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-13 21:56:35,311 INFO L132 encePairwiseOnDemand]: 295/298 looper letters, 15 selfloop transitions, 2 changer transitions 0/234 dead transitions. [2022-07-13 21:56:35,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 234 transitions, 562 flow [2022-07-13 21:56:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-07-13 21:56:35,313 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154362416107382 [2022-07-13 21:56:35,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-07-13 21:56:35,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-07-13 21:56:35,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:35,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-07-13 21:56:35,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,316 INFO L186 Difference]: Start difference. First operand has 264 places, 230 transitions, 520 flow. Second operand 3 states and 729 transitions. [2022-07-13 21:56:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 234 transitions, 562 flow [2022-07-13 21:56:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:35,319 INFO L242 Difference]: Finished difference. Result has 247 places, 231 transitions, 502 flow [2022-07-13 21:56:35,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=247, PETRI_TRANSITIONS=231} [2022-07-13 21:56:35,320 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -17 predicate places. [2022-07-13 21:56:35,320 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 231 transitions, 502 flow [2022-07-13 21:56:35,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,321 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] [2022-07-13 21:56:35,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:56:35,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1892820934, now seen corresponding path program 1 times [2022-07-13 21:56:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938562450] [2022-07-13 21:56:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938562450] [2022-07-13 21:56:35,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938562450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137607127] [2022-07-13 21:56:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:35,360 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 21:56:35,361 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 21:56:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137607127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:35,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:35,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748122100] [2022-07-13 21:56:35,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:35,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:35,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-13 21:56:35,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 231 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:35,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-13 21:56:35,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:35,587 INFO L129 PetriNetUnfolder]: 0/315 cut-off events. [2022-07-13 21:56:35,588 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:56:35,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 315 events. 0/315 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 811 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-13 21:56:35,588 INFO L132 encePairwiseOnDemand]: 292/298 looper letters, 16 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2022-07-13 21:56:35,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 241 transitions, 574 flow [2022-07-13 21:56:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2022-07-13 21:56:35,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.802013422818792 [2022-07-13 21:56:35,592 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2022-07-13 21:56:35,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2022-07-13 21:56:35,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:35,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2022-07-13 21:56:35,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 298.0) internal successors, (2980), 10 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,599 INFO L186 Difference]: Start difference. First operand has 247 places, 231 transitions, 502 flow. Second operand 9 states and 2151 transitions. [2022-07-13 21:56:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 241 transitions, 574 flow [2022-07-13 21:56:35,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 241 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:35,602 INFO L242 Difference]: Finished difference. Result has 257 places, 237 transitions, 550 flow [2022-07-13 21:56:35,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=257, PETRI_TRANSITIONS=237} [2022-07-13 21:56:35,603 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -7 predicate places. [2022-07-13 21:56:35,603 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 237 transitions, 550 flow [2022-07-13 21:56:35,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.3) internal successors, (2383), 10 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:35,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,604 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:35,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 21:56:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:35,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,825 INFO L85 PathProgramCache]: Analyzing trace with hash -947304445, now seen corresponding path program 1 times [2022-07-13 21:56:35,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003734127] [2022-07-13 21:56:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003734127] [2022-07-13 21:56:35,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003734127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:35,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719214939] [2022-07-13 21:56:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:35,881 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 21:56:35,882 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 21:56:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719214939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:36,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:36,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073883550] [2022-07-13 21:56:36,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:36,088 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 298 [2022-07-13 21:56:36,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 237 transitions, 550 flow. Second operand has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:36,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 298 [2022-07-13 21:56:36,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:36,283 INFO L129 PetriNetUnfolder]: 0/267 cut-off events. [2022-07-13 21:56:36,284 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:56:36,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 267 events. 0/267 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 509 event pairs, 0 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-13 21:56:36,285 INFO L132 encePairwiseOnDemand]: 293/298 looper letters, 21 selfloop transitions, 19 changer transitions 0/245 dead transitions. [2022-07-13 21:56:36,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 245 transitions, 686 flow [2022-07-13 21:56:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5000 transitions. [2022-07-13 21:56:36,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7989773090444231 [2022-07-13 21:56:36,289 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5000 transitions. [2022-07-13 21:56:36,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5000 transitions. [2022-07-13 21:56:36,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:36,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5000 transitions. [2022-07-13 21:56:36,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 238.0952380952381) internal successors, (5000), 21 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,305 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 298.0) internal successors, (6556), 22 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,305 INFO L186 Difference]: Start difference. First operand has 257 places, 237 transitions, 550 flow. Second operand 21 states and 5000 transitions. [2022-07-13 21:56:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 245 transitions, 686 flow [2022-07-13 21:56:36,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 245 transitions, 661 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:36,310 INFO L242 Difference]: Finished difference. Result has 261 places, 234 transitions, 584 flow [2022-07-13 21:56:36,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=584, PETRI_PLACES=261, PETRI_TRANSITIONS=234} [2022-07-13 21:56:36,311 INFO L279 CegarLoopForPetriNet]: 264 programPoint places, -3 predicate places. [2022-07-13 21:56:36,311 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 234 transitions, 584 flow [2022-07-13 21:56:36,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 238.61111111111111) internal successors, (4295), 18 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:36,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:36,312 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:36,334 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 21:56:36,532 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,SelfDestructingSolverStorable24 [2022-07-13 21:56:36,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash -480155363, now seen corresponding path program 1 times [2022-07-13 21:56:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:36,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331423311] [2022-07-13 21:56:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:36,558 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:36,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:36,577 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:36,578 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:36,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 21:56:36,578 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:36,580 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:36,580 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-13 21:56:36,619 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-13 21:56:36,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 294 places, 333 transitions, 764 flow [2022-07-13 21:56:37,060 INFO L129 PetriNetUnfolder]: 530/2774 cut-off events. [2022-07-13 21:56:37,061 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-13 21:56:37,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 2774 events. 530/2774 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 18746 event pairs, 201 based on Foata normal form. 0/2428 useless extension candidates. Maximal degree in co-relation 1773. Up to 448 conditions per place. [2022-07-13 21:56:37,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 333 transitions, 764 flow [2022-07-13 21:56:37,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 333 transitions, 764 flow [2022-07-13 21:56:37,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:37,136 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:37,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:37,141 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-13 21:56:37,141 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:37,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,142 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] [2022-07-13 21:56:37,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash 892205494, now seen corresponding path program 1 times [2022-07-13 21:56:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605382073] [2022-07-13 21:56:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605382073] [2022-07-13 21:56:37,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605382073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:37,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:37,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:37,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044825565] [2022-07-13 21:56:37,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:37,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:37,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:37,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 333 [2022-07-13 21:56:37,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 333 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 333 [2022-07-13 21:56:37,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,676 INFO L129 PetriNetUnfolder]: 327/2545 cut-off events. [2022-07-13 21:56:37,676 INFO L130 PetriNetUnfolder]: For 1469/1674 co-relation queries the response was YES. [2022-07-13 21:56:37,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3538 conditions, 2545 events. 327/2545 cut-off events. For 1469/1674 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18149 event pairs, 201 based on Foata normal form. 3525/5928 useless extension candidates. Maximal degree in co-relation 1851. Up to 490 conditions per place. [2022-07-13 21:56:37,697 INFO L132 encePairwiseOnDemand]: 283/333 looper letters, 16 selfloop transitions, 2 changer transitions 27/289 dead transitions. [2022-07-13 21:56:37,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 289 transitions, 726 flow [2022-07-13 21:56:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2022-07-13 21:56:37,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8728728728728729 [2022-07-13 21:56:37,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2022-07-13 21:56:37,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2022-07-13 21:56:37,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2022-07-13 21:56:37,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,703 INFO L186 Difference]: Start difference. First operand has 294 places, 333 transitions, 764 flow. Second operand 3 states and 872 transitions. [2022-07-13 21:56:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 289 transitions, 726 flow [2022-07-13 21:56:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 289 transitions, 726 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:37,707 INFO L242 Difference]: Finished difference. Result has 296 places, 259 transitions, 605 flow [2022-07-13 21:56:37,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=293, 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=605, PETRI_PLACES=296, PETRI_TRANSITIONS=259} [2022-07-13 21:56:37,708 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 2 predicate places. [2022-07-13 21:56:37,708 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 259 transitions, 605 flow [2022-07-13 21:56:37,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,709 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] [2022-07-13 21:56:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 21:56:37,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 603123749, now seen corresponding path program 1 times [2022-07-13 21:56:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257944994] [2022-07-13 21:56:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257944994] [2022-07-13 21:56:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257944994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196601207] [2022-07-13 21:56:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:37,743 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 21:56:37,744 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 21:56:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196601207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:37,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:37,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:37,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771610030] [2022-07-13 21:56:37,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:37,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:37,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-13 21:56:37,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 259 transitions, 605 flow. Second operand has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-13 21:56:37,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,979 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-13 21:56:37,979 INFO L130 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-07-13 21:56:37,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 364 events. 0/364 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 994 event pairs, 0 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-13 21:56:37,980 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 17 selfloop transitions, 9 changer transitions 0/269 dead transitions. [2022-07-13 21:56:37,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 269 transitions, 679 flow [2022-07-13 21:56:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2395 transitions. [2022-07-13 21:56:37,984 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991324657991324 [2022-07-13 21:56:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2395 transitions. [2022-07-13 21:56:37,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2395 transitions. [2022-07-13 21:56:37,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2395 transitions. [2022-07-13 21:56:37,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 266.1111111111111) internal successors, (2395), 9 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,992 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,992 INFO L186 Difference]: Start difference. First operand has 296 places, 259 transitions, 605 flow. Second operand 9 states and 2395 transitions. [2022-07-13 21:56:37,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 269 transitions, 679 flow [2022-07-13 21:56:37,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 269 transitions, 635 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:37,996 INFO L242 Difference]: Finished difference. Result has 286 places, 265 transitions, 611 flow [2022-07-13 21:56:37,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=611, PETRI_PLACES=286, PETRI_TRANSITIONS=265} [2022-07-13 21:56:37,998 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, -8 predicate places. [2022-07-13 21:56:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 265 transitions, 611 flow [2022-07-13 21:56:37,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 265.3) internal successors, (2653), 10 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:37,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,999 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:38,032 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 21:56:38,211 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,SelfDestructingSolverStorable27 [2022-07-13 21:56:38,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1852105632, now seen corresponding path program 1 times [2022-07-13 21:56:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882443922] [2022-07-13 21:56:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882443922] [2022-07-13 21:56:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882443922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068023022] [2022-07-13 21:56:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:38,287 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 21:56:38,313 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 21:56:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068023022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:38,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:38,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258862440] [2022-07-13 21:56:38,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:38,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:38,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 333 [2022-07-13 21:56:38,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 265 transitions, 611 flow. Second operand has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:38,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:38,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 333 [2022-07-13 21:56:38,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:38,709 INFO L129 PetriNetUnfolder]: 0/316 cut-off events. [2022-07-13 21:56:38,709 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-13 21:56:38,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 316 events. 0/316 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 670 event pairs, 0 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-13 21:56:38,710 INFO L132 encePairwiseOnDemand]: 327/333 looper letters, 25 selfloop transitions, 21 changer transitions 0/289 dead transitions. [2022-07-13 21:56:38,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 289 transitions, 811 flow [2022-07-13 21:56:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5573 transitions. [2022-07-13 21:56:38,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969397969397969 [2022-07-13 21:56:38,729 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5573 transitions. [2022-07-13 21:56:38,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5573 transitions. [2022-07-13 21:56:38,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:38,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5573 transitions. [2022-07-13 21:56:38,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 265.3809523809524) internal successors, (5573), 21 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:38,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:38,743 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:38,743 INFO L186 Difference]: Start difference. First operand has 286 places, 265 transitions, 611 flow. Second operand 21 states and 5573 transitions. [2022-07-13 21:56:38,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 289 transitions, 811 flow [2022-07-13 21:56:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 289 transitions, 797 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:38,749 INFO L242 Difference]: Finished difference. Result has 310 places, 278 transitions, 735 flow [2022-07-13 21:56:38,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=735, PETRI_PLACES=310, PETRI_TRANSITIONS=278} [2022-07-13 21:56:38,750 INFO L279 CegarLoopForPetriNet]: 294 programPoint places, 16 predicate places. [2022-07-13 21:56:38,750 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 278 transitions, 735 flow [2022-07-13 21:56:38,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 265.6111111111111) internal successors, (4781), 18 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:38,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:38,750 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 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] [2022-07-13 21:56:38,769 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 21:56:38,963 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,SelfDestructingSolverStorable28 [2022-07-13 21:56:38,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1397501112, now seen corresponding path program 1 times [2022-07-13 21:56:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:38,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750915707] [2022-07-13 21:56:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:38,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:38,979 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:38,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:38,994 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:38,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:38,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 21:56:38,994 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:56:38,995 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:38,995 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-13 21:56:39,015 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-13 21:56:39,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 324 places, 368 transitions, 856 flow [2022-07-13 21:56:40,021 INFO L129 PetriNetUnfolder]: 1117/5209 cut-off events. [2022-07-13 21:56:40,021 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-13 21:56:40,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6294 conditions, 5209 events. 1117/5209 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 41681 event pairs, 522 based on Foata normal form. 0/4595 useless extension candidates. Maximal degree in co-relation 3256. Up to 1024 conditions per place. [2022-07-13 21:56:40,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 324 places, 368 transitions, 856 flow [2022-07-13 21:56:40,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 368 transitions, 856 flow [2022-07-13 21:56:40,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:40,163 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:40,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:40,166 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-13 21:56:40,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:40,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:40,167 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] [2022-07-13 21:56:40,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1825495626, now seen corresponding path program 1 times [2022-07-13 21:56:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447307874] [2022-07-13 21:56:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:40,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447307874] [2022-07-13 21:56:40,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447307874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:40,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495018120] [2022-07-13 21:56:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:40,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 368 [2022-07-13 21:56:40,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 856 flow. Second operand has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:40,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:40,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 368 [2022-07-13 21:56:40,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:41,209 INFO L129 PetriNetUnfolder]: 776/4841 cut-off events. [2022-07-13 21:56:41,209 INFO L130 PetriNetUnfolder]: For 3248/3503 co-relation queries the response was YES. [2022-07-13 21:56:41,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7003 conditions, 4841 events. 776/4841 cut-off events. For 3248/3503 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40415 event pairs, 522 based on Foata normal form. 7350/11919 useless extension candidates. Maximal degree in co-relation 3522. Up to 1072 conditions per place. [2022-07-13 21:56:41,272 INFO L132 encePairwiseOnDemand]: 312/368 looper letters, 17 selfloop transitions, 2 changer transitions 28/318 dead transitions. [2022-07-13 21:56:41,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 318 transitions, 810 flow [2022-07-13 21:56:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 961 transitions. [2022-07-13 21:56:41,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8704710144927537 [2022-07-13 21:56:41,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 961 transitions. [2022-07-13 21:56:41,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 961 transitions. [2022-07-13 21:56:41,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:41,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 961 transitions. [2022-07-13 21:56:41,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,278 INFO L186 Difference]: Start difference. First operand has 324 places, 368 transitions, 856 flow. Second operand 3 states and 961 transitions. [2022-07-13 21:56:41,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 318 transitions, 810 flow [2022-07-13 21:56:41,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 318 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:41,285 INFO L242 Difference]: Finished difference. Result has 326 places, 287 transitions, 680 flow [2022-07-13 21:56:41,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=326, PETRI_TRANSITIONS=287} [2022-07-13 21:56:41,286 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 2 predicate places. [2022-07-13 21:56:41,286 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 287 transitions, 680 flow [2022-07-13 21:56:41,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,286 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,287 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] [2022-07-13 21:56:41,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 21:56:41,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash -214226908, now seen corresponding path program 1 times [2022-07-13 21:56:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798541889] [2022-07-13 21:56:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798541889] [2022-07-13 21:56:41,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798541889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811104105] [2022-07-13 21:56:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:41,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:41,322 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 21:56:41,323 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 21:56:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811104105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:41,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:41,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752543468] [2022-07-13 21:56:41,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:41,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-13 21:56:41,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 287 transitions, 680 flow. Second operand has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:41,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-13 21:56:41,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:41,606 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2022-07-13 21:56:41,606 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-13 21:56:41,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 413 events. 0/413 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1177 event pairs, 0 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-13 21:56:41,607 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 18 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-13 21:56:41,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 297 transitions, 756 flow [2022-07-13 21:56:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2639 transitions. [2022-07-13 21:56:41,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967995169082126 [2022-07-13 21:56:41,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2639 transitions. [2022-07-13 21:56:41,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2639 transitions. [2022-07-13 21:56:41,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:41,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2639 transitions. [2022-07-13 21:56:41,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.22222222222223) internal successors, (2639), 9 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,616 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 368.0) internal successors, (3680), 10 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,616 INFO L186 Difference]: Start difference. First operand has 326 places, 287 transitions, 680 flow. Second operand 9 states and 2639 transitions. [2022-07-13 21:56:41,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 297 transitions, 756 flow [2022-07-13 21:56:41,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 297 transitions, 698 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:41,621 INFO L242 Difference]: Finished difference. Result has 316 places, 293 transitions, 672 flow [2022-07-13 21:56:41,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=305, 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=672, PETRI_PLACES=316, PETRI_TRANSITIONS=293} [2022-07-13 21:56:41,623 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, -8 predicate places. [2022-07-13 21:56:41,623 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 293 transitions, 672 flow [2022-07-13 21:56:41,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 292.3) internal successors, (2923), 10 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:41,623 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,624 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:41,643 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 21:56:41,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-13 21:56:41,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 521323549, now seen corresponding path program 1 times [2022-07-13 21:56:41,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827910416] [2022-07-13 21:56:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827910416] [2022-07-13 21:56:42,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827910416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125202013] [2022-07-13 21:56:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:42,009 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 21:56:42,057 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 21:56:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125202013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:42,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:42,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94486256] [2022-07-13 21:56:42,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:42,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-13 21:56:42,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 293 transitions, 672 flow. Second operand has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:42,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:42,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-13 21:56:42,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:42,490 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2022-07-13 21:56:42,490 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-13 21:56:42,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 365 events. 0/365 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 856 event pairs, 0 based on Foata normal form. 4/369 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-13 21:56:42,491 INFO L132 encePairwiseOnDemand]: 362/368 looper letters, 26 selfloop transitions, 21 changer transitions 0/317 dead transitions. [2022-07-13 21:56:42,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 317 transitions, 874 flow [2022-07-13 21:56:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6141 transitions. [2022-07-13 21:56:42,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-13 21:56:42,496 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6141 transitions. [2022-07-13 21:56:42,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6141 transitions. [2022-07-13 21:56:42,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:42,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6141 transitions. [2022-07-13 21:56:42,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 292.42857142857144) internal successors, (6141), 21 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:42,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:42,509 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 368.0) internal successors, (8096), 22 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:42,509 INFO L186 Difference]: Start difference. First operand has 316 places, 293 transitions, 672 flow. Second operand 21 states and 6141 transitions. [2022-07-13 21:56:42,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 317 transitions, 874 flow [2022-07-13 21:56:42,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 317 transitions, 860 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:42,514 INFO L242 Difference]: Finished difference. Result has 340 places, 306 transitions, 796 flow [2022-07-13 21:56:42,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=796, PETRI_PLACES=340, PETRI_TRANSITIONS=306} [2022-07-13 21:56:42,515 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 16 predicate places. [2022-07-13 21:56:42,515 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 306 transitions, 796 flow [2022-07-13 21:56:42,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 292.6111111111111) internal successors, (5267), 18 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:42,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:42,516 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-13 21:56:42,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 21:56:42,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-13 21:56:42,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash -314164349, now seen corresponding path program 1 times [2022-07-13 21:56:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:42,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028624997] [2022-07-13 21:56:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028624997] [2022-07-13 21:56:42,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028624997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631382042] [2022-07-13 21:56:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:42,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:42,846 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:42,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 21:56:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:43,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:43,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631382042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:43,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:43,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334818336] [2022-07-13 21:56:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:43,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:43,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 368 [2022-07-13 21:56:43,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 306 transitions, 796 flow. Second operand has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:43,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:43,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 368 [2022-07-13 21:56:43,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:43,549 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2022-07-13 21:56:43,549 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-13 21:56:43,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 341 events. 0/341 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 717 event pairs, 0 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-13 21:56:43,550 INFO L132 encePairwiseOnDemand]: 363/368 looper letters, 27 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2022-07-13 21:56:43,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 311 transitions, 942 flow [2022-07-13 21:56:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:56:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:56:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7884 transitions. [2022-07-13 21:56:43,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934782608695652 [2022-07-13 21:56:43,556 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7884 transitions. [2022-07-13 21:56:43,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7884 transitions. [2022-07-13 21:56:43,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:43,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7884 transitions. [2022-07-13 21:56:43,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 292.0) internal successors, (7884), 27 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:43,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:43,572 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 368.0) internal successors, (10304), 28 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:43,573 INFO L186 Difference]: Start difference. First operand has 340 places, 306 transitions, 796 flow. Second operand 27 states and 7884 transitions. [2022-07-13 21:56:43,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 311 transitions, 942 flow [2022-07-13 21:56:43,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 311 transitions, 888 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:43,578 INFO L242 Difference]: Finished difference. Result has 341 places, 297 transitions, 781 flow [2022-07-13 21:56:43,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=781, PETRI_PLACES=341, PETRI_TRANSITIONS=297} [2022-07-13 21:56:43,579 INFO L279 CegarLoopForPetriNet]: 324 programPoint places, 17 predicate places. [2022-07-13 21:56:43,579 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 297 transitions, 781 flow [2022-07-13 21:56:43,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 292.79411764705884) internal successors, (9955), 34 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:43,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:43,580 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:43,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:43,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-13 21:56:43,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2097645159, now seen corresponding path program 1 times [2022-07-13 21:56:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:43,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357393299] [2022-07-13 21:56:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:43,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:43,819 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:43,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:43,836 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:43,836 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:43,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 21:56:43,836 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:43,837 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:43,837 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-13 21:56:43,861 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-13 21:56:43,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 354 places, 403 transitions, 950 flow [2022-07-13 21:56:45,873 INFO L129 PetriNetUnfolder]: 2408/10140 cut-off events. [2022-07-13 21:56:45,873 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-13 21:56:46,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12517 conditions, 10140 events. 2408/10140 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 95201 event pairs, 1291 based on Foata normal form. 0/9002 useless extension candidates. Maximal degree in co-relation 6276. Up to 2304 conditions per place. [2022-07-13 21:56:46,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 403 transitions, 950 flow [2022-07-13 21:56:46,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 403 transitions, 950 flow [2022-07-13 21:56:46,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:46,162 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:46,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:46,167 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-13 21:56:46,167 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:46,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:46,167 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] [2022-07-13 21:56:46,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 239543831, now seen corresponding path program 1 times [2022-07-13 21:56:46,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233897184] [2022-07-13 21:56:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:46,180 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 21:56:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:46,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233897184] [2022-07-13 21:56:46,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233897184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:46,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:46,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075802249] [2022-07-13 21:56:46,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:46,183 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 403 [2022-07-13 21:56:46,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 403 transitions, 950 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 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 21:56:46,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:46,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 403 [2022-07-13 21:56:46,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:48,385 INFO L129 PetriNetUnfolder]: 1802/9524 cut-off events. [2022-07-13 21:56:48,385 INFO L130 PetriNetUnfolder]: For 7120/7164 co-relation queries the response was YES. [2022-07-13 21:56:48,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 9524 events. 1802/9524 cut-off events. For 7120/7164 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91594 event pairs, 1291 based on Foata normal form. 14546/23538 useless extension candidates. Maximal degree in co-relation 6959. Up to 2314 conditions per place. [2022-07-13 21:56:48,478 INFO L132 encePairwiseOnDemand]: 344/403 looper letters, 9 selfloop transitions, 0 changer transitions 29/343 dead transitions. [2022-07-13 21:56:48,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 343 transitions, 866 flow [2022-07-13 21:56:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 727 transitions. [2022-07-13 21:56:48,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.901985111662531 [2022-07-13 21:56:48,484 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 727 transitions. [2022-07-13 21:56:48,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 727 transitions. [2022-07-13 21:56:48,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:48,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 727 transitions. [2022-07-13 21:56:48,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 363.5) internal successors, (727), 2 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,486 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,486 INFO L186 Difference]: Start difference. First operand has 354 places, 403 transitions, 950 flow. Second operand 2 states and 727 transitions. [2022-07-13 21:56:48,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 343 transitions, 866 flow [2022-07-13 21:56:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 343 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:48,492 INFO L242 Difference]: Finished difference. Result has 354 places, 314 transitions, 745 flow [2022-07-13 21:56:48,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=745, PETRI_PLACES=354, PETRI_TRANSITIONS=314} [2022-07-13 21:56:48,497 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 0 predicate places. [2022-07-13 21:56:48,497 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 314 transitions, 745 flow [2022-07-13 21:56:48,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 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 21:56:48,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:48,497 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] [2022-07-13 21:56:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-13 21:56:48,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash 368626550, now seen corresponding path program 1 times [2022-07-13 21:56:48,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:48,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936421433] [2022-07-13 21:56:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936421433] [2022-07-13 21:56:48,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936421433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:48,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:48,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:48,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790059150] [2022-07-13 21:56:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:48,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:48,513 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 403 [2022-07-13 21:56:48,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 314 transitions, 745 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:48,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 403 [2022-07-13 21:56:48,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:48,596 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-13 21:56:48,597 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-13 21:56:48,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 486 events. 0/486 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1507 event pairs, 0 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-13 21:56:48,598 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 18 selfloop transitions, 2 changer transitions 0/318 dead transitions. [2022-07-13 21:56:48,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 318 transitions, 793 flow [2022-07-13 21:56:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-07-13 21:56:48,599 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-13 21:56:48,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-07-13 21:56:48,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-07-13 21:56:48,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:48,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-07-13 21:56:48,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,602 INFO L186 Difference]: Start difference. First operand has 354 places, 314 transitions, 745 flow. Second operand 3 states and 975 transitions. [2022-07-13 21:56:48,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 318 transitions, 793 flow [2022-07-13 21:56:48,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 318 transitions, 721 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:48,606 INFO L242 Difference]: Finished difference. Result has 337 places, 315 transitions, 685 flow [2022-07-13 21:56:48,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=685, PETRI_PLACES=337, PETRI_TRANSITIONS=315} [2022-07-13 21:56:48,608 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -17 predicate places. [2022-07-13 21:56:48,609 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 315 transitions, 685 flow [2022-07-13 21:56:48,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:48,609 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] [2022-07-13 21:56:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-13 21:56:48,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -559231037, now seen corresponding path program 1 times [2022-07-13 21:56:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061600705] [2022-07-13 21:56:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061600705] [2022-07-13 21:56:48,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061600705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337975173] [2022-07-13 21:56:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:48,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:48,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:48,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 21:56:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337975173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:48,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:48,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604651522] [2022-07-13 21:56:48,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:48,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-13 21:56:48,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 315 transitions, 685 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:48,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:48,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-13 21:56:48,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:49,029 INFO L129 PetriNetUnfolder]: 0/462 cut-off events. [2022-07-13 21:56:49,030 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-13 21:56:49,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 462 events. 0/462 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1362 event pairs, 0 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-13 21:56:49,031 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 19 selfloop transitions, 9 changer transitions 0/325 dead transitions. [2022-07-13 21:56:49,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 325 transitions, 763 flow [2022-07-13 21:56:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2883 transitions. [2022-07-13 21:56:49,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-07-13 21:56:49,033 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2883 transitions. [2022-07-13 21:56:49,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2883 transitions. [2022-07-13 21:56:49,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:49,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2883 transitions. [2022-07-13 21:56:49,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.3333333333333) internal successors, (2883), 9 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,039 INFO L186 Difference]: Start difference. First operand has 337 places, 315 transitions, 685 flow. Second operand 9 states and 2883 transitions. [2022-07-13 21:56:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 325 transitions, 763 flow [2022-07-13 21:56:49,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 325 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:49,043 INFO L242 Difference]: Finished difference. Result has 347 places, 321 transitions, 733 flow [2022-07-13 21:56:49,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=733, PETRI_PLACES=347, PETRI_TRANSITIONS=321} [2022-07-13 21:56:49,043 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, -7 predicate places. [2022-07-13 21:56:49,043 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 321 transitions, 733 flow [2022-07-13 21:56:49,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,044 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:49,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:49,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:49,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1878015802, now seen corresponding path program 1 times [2022-07-13 21:56:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103121784] [2022-07-13 21:56:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103121784] [2022-07-13 21:56:49,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103121784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93155289] [2022-07-13 21:56:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:49,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:49,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 21:56:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93155289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:49,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:49,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:49,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733391037] [2022-07-13 21:56:49,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:49,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:49,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:49,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-13 21:56:49,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 321 transitions, 733 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:49,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-13 21:56:49,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:49,748 INFO L129 PetriNetUnfolder]: 0/414 cut-off events. [2022-07-13 21:56:49,749 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:56:49,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 414 events. 0/414 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1040 event pairs, 0 based on Foata normal form. 4/418 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-13 21:56:49,750 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 27 selfloop transitions, 21 changer transitions 0/345 dead transitions. [2022-07-13 21:56:49,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 345 transitions, 937 flow [2022-07-13 21:56:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6709 transitions. [2022-07-13 21:56:49,754 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927448895190831 [2022-07-13 21:56:49,754 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6709 transitions. [2022-07-13 21:56:49,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6709 transitions. [2022-07-13 21:56:49,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:49,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6709 transitions. [2022-07-13 21:56:49,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.4761904761905) internal successors, (6709), 21 states have internal predecessors, (6709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 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 21:56:49,765 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 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 21:56:49,765 INFO L186 Difference]: Start difference. First operand has 347 places, 321 transitions, 733 flow. Second operand 21 states and 6709 transitions. [2022-07-13 21:56:49,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 345 transitions, 937 flow [2022-07-13 21:56:49,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 345 transitions, 923 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:49,770 INFO L242 Difference]: Finished difference. Result has 371 places, 334 transitions, 857 flow [2022-07-13 21:56:49,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=857, PETRI_PLACES=371, PETRI_TRANSITIONS=334} [2022-07-13 21:56:49,771 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 17 predicate places. [2022-07-13 21:56:49,772 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 334 transitions, 857 flow [2022-07-13 21:56:49,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:49,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,772 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-13 21:56:49,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:49,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-13 21:56:49,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash -546906980, now seen corresponding path program 1 times [2022-07-13 21:56:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137921644] [2022-07-13 21:56:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137921644] [2022-07-13 21:56:50,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137921644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:50,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649892197] [2022-07-13 21:56:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:50,111 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:50,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 21:56:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649892197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:50,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:50,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:50,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590663684] [2022-07-13 21:56:50,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:50,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:50,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:50,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:50,594 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 403 [2022-07-13 21:56:50,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 334 transitions, 857 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:50,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:50,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 403 [2022-07-13 21:56:50,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:50,898 INFO L129 PetriNetUnfolder]: 0/378 cut-off events. [2022-07-13 21:56:50,898 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-13 21:56:50,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 378 events. 0/378 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 821 event pairs, 0 based on Foata normal form. 3/381 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-13 21:56:50,899 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 30 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-07-13 21:56:50,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 344 transitions, 1049 flow [2022-07-13 21:56:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:56:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:56:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9571 transitions. [2022-07-13 21:56:50,912 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791645988420182 [2022-07-13 21:56:50,913 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9571 transitions. [2022-07-13 21:56:50,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9571 transitions. [2022-07-13 21:56:50,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:50,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9571 transitions. [2022-07-13 21:56:50,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 319.03333333333336) internal successors, (9571), 30 states have internal predecessors, (9571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:50,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:50,978 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 403.0) internal successors, (12493), 31 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:50,978 INFO L186 Difference]: Start difference. First operand has 371 places, 334 transitions, 857 flow. Second operand 30 states and 9571 transitions. [2022-07-13 21:56:50,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 344 transitions, 1049 flow [2022-07-13 21:56:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 344 transitions, 989 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:50,983 INFO L242 Difference]: Finished difference. Result has 375 places, 328 transitions, 866 flow [2022-07-13 21:56:50,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=866, PETRI_PLACES=375, PETRI_TRANSITIONS=328} [2022-07-13 21:56:50,983 INFO L279 CegarLoopForPetriNet]: 354 programPoint places, 21 predicate places. [2022-07-13 21:56:50,983 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 328 transitions, 866 flow [2022-07-13 21:56:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:50,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:50,985 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:51,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-13 21:56:51,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2085713552, now seen corresponding path program 1 times [2022-07-13 21:56:51,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:51,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481903204] [2022-07-13 21:56:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:51,210 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:51,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:51,237 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:51,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:51,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:51,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 21:56:51,238 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:56:51,238 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:51,238 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-13 21:56:51,265 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-13 21:56:51,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 384 places, 438 transitions, 1046 flow [2022-07-13 21:56:55,740 INFO L129 PetriNetUnfolder]: 5235/20191 cut-off events. [2022-07-13 21:56:55,741 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-13 21:56:56,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25397 conditions, 20191 events. 5235/20191 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 211459 event pairs, 3084 based on Foata normal form. 0/18017 useless extension candidates. Maximal degree in co-relation 12497. Up to 5120 conditions per place. [2022-07-13 21:56:56,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 438 transitions, 1046 flow [2022-07-13 21:56:56,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 438 transitions, 1046 flow [2022-07-13 21:56:56,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:56,402 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:56:56,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:56,405 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-13 21:56:56,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:56,405 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:56,405 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] [2022-07-13 21:56:56,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1244445289, now seen corresponding path program 1 times [2022-07-13 21:56:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:56,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399039510] [2022-07-13 21:56:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:56,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:56,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:56,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399039510] [2022-07-13 21:56:56,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399039510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:56,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:56,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:56,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892440844] [2022-07-13 21:56:56,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:56,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:56,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:56,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 438 [2022-07-13 21:56:56,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 438 transitions, 1046 flow. Second operand has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:56,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:56,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 438 [2022-07-13 21:56:56,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:01,135 INFO L129 PetriNetUnfolder]: 4107/19052 cut-off events. [2022-07-13 21:57:01,135 INFO L130 PetriNetUnfolder]: For 15634/15684 co-relation queries the response was YES. [2022-07-13 21:57:01,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29389 conditions, 19052 events. 4107/19052 cut-off events. For 15634/15684 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 207205 event pairs, 3084 based on Foata normal form. 32006/50012 useless extension candidates. Maximal degree in co-relation 14194. Up to 5131 conditions per place. [2022-07-13 21:57:01,475 INFO L132 encePairwiseOnDemand]: 373/438 looper letters, 10 selfloop transitions, 0 changer transitions 30/372 dead transitions. [2022-07-13 21:57:01,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 372 transitions, 954 flow [2022-07-13 21:57:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-13 21:57:01,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9006849315068494 [2022-07-13 21:57:01,477 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-13 21:57:01,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-13 21:57:01,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:01,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-13 21:57:01,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states 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 21:57:01,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:57:01,479 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:57:01,479 INFO L186 Difference]: Start difference. First operand has 384 places, 438 transitions, 1046 flow. Second operand 2 states and 789 transitions. [2022-07-13 21:57:01,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 372 transitions, 954 flow [2022-07-13 21:57:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 372 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:01,489 INFO L242 Difference]: Finished difference. Result has 384 places, 342 transitions, 824 flow [2022-07-13 21:57:01,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=824, PETRI_PLACES=384, PETRI_TRANSITIONS=342} [2022-07-13 21:57:01,490 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 0 predicate places. [2022-07-13 21:57:01,490 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 342 transitions, 824 flow [2022-07-13 21:57:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 352.5) internal successors, (705), 2 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 21:57:01,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:01,491 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] [2022-07-13 21:57:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-13 21:57:01,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1115362570, now seen corresponding path program 1 times [2022-07-13 21:57:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840928800] [2022-07-13 21:57:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:01,505 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 21:57:01,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840928800] [2022-07-13 21:57:01,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840928800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:01,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:01,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144663944] [2022-07-13 21:57:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:01,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:01,508 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 438 [2022-07-13 21:57:01,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 342 transitions, 824 flow. Second operand has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 21:57:01,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:01,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 438 [2022-07-13 21:57:01,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:01,631 INFO L129 PetriNetUnfolder]: 0/535 cut-off events. [2022-07-13 21:57:01,631 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-13 21:57:01,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 535 events. 0/535 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1694 event pairs, 0 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-13 21:57:01,632 INFO L132 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 2 changer transitions 0/346 dead transitions. [2022-07-13 21:57:01,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 346 transitions, 874 flow [2022-07-13 21:57:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2022-07-13 21:57:01,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.80441400304414 [2022-07-13 21:57:01,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2022-07-13 21:57:01,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2022-07-13 21:57:01,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:01,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2022-07-13 21:57:01,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:01,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 21:57:01,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 21:57:01,636 INFO L186 Difference]: Start difference. First operand has 384 places, 342 transitions, 824 flow. Second operand 3 states and 1057 transitions. [2022-07-13 21:57:01,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 346 transitions, 874 flow [2022-07-13 21:57:01,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 346 transitions, 784 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:01,642 INFO L242 Difference]: Finished difference. Result has 367 places, 343 transitions, 746 flow [2022-07-13 21:57:01,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=746, PETRI_PLACES=367, PETRI_TRANSITIONS=343} [2022-07-13 21:57:01,642 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -17 predicate places. [2022-07-13 21:57:01,643 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 343 transitions, 746 flow [2022-07-13 21:57:01,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states 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 21:57:01,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:01,643 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] [2022-07-13 21:57:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-13 21:57:01,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -431888638, now seen corresponding path program 1 times [2022-07-13 21:57:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:01,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286470407] [2022-07-13 21:57:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:01,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:01,666 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 21:57:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:01,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286470407] [2022-07-13 21:57:01,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286470407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:01,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56726166] [2022-07-13 21:57:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:01,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:01,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:01,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 21:57:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:01,857 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 21:57:01,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:01,882 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 21:57:01,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56726166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:01,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:01,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409814372] [2022-07-13 21:57:01,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:01,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-13 21:57:01,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 343 transitions, 746 flow. Second operand has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states 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 21:57:01,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:01,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-13 21:57:01,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:02,125 INFO L129 PetriNetUnfolder]: 0/511 cut-off events. [2022-07-13 21:57:02,125 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-13 21:57:02,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 511 events. 0/511 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1549 event pairs, 0 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-13 21:57:02,126 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 20 selfloop transitions, 9 changer transitions 0/353 dead transitions. [2022-07-13 21:57:02,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 353 transitions, 826 flow [2022-07-13 21:57:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3127 transitions. [2022-07-13 21:57:02,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932521562658549 [2022-07-13 21:57:02,129 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3127 transitions. [2022-07-13 21:57:02,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3127 transitions. [2022-07-13 21:57:02,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:02,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3127 transitions. [2022-07-13 21:57:02,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 347.44444444444446) internal successors, (3127), 9 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states 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 21:57:02,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states 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 21:57:02,134 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states 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 21:57:02,134 INFO L186 Difference]: Start difference. First operand has 367 places, 343 transitions, 746 flow. Second operand 9 states and 3127 transitions. [2022-07-13 21:57:02,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 353 transitions, 826 flow [2022-07-13 21:57:02,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 353 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:02,139 INFO L242 Difference]: Finished difference. Result has 377 places, 349 transitions, 794 flow [2022-07-13 21:57:02,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=794, PETRI_PLACES=377, PETRI_TRANSITIONS=349} [2022-07-13 21:57:02,140 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, -7 predicate places. [2022-07-13 21:57:02,140 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 349 transitions, 794 flow [2022-07-13 21:57:02,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 346.3) internal successors, (3463), 10 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states 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 21:57:02,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:02,140 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:02,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:02,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2076996169, now seen corresponding path program 1 times [2022-07-13 21:57:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014538094] [2022-07-13 21:57:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014538094] [2022-07-13 21:57:02,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014538094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826714843] [2022-07-13 21:57:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:02,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:02,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:02,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 21:57:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826714843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:02,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:02,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736932949] [2022-07-13 21:57:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:02,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:02,670 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-13 21:57:02,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 349 transitions, 794 flow. Second operand has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states 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 21:57:02,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:02,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-13 21:57:02,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:02,913 INFO L129 PetriNetUnfolder]: 0/463 cut-off events. [2022-07-13 21:57:02,913 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-13 21:57:02,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 463 events. 0/463 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1224 event pairs, 0 based on Foata normal form. 4/467 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-13 21:57:02,915 INFO L132 encePairwiseOnDemand]: 432/438 looper letters, 28 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2022-07-13 21:57:02,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 373 transitions, 1000 flow [2022-07-13 21:57:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7277 transitions. [2022-07-13 21:57:02,927 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7911502500543597 [2022-07-13 21:57:02,927 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7277 transitions. [2022-07-13 21:57:02,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7277 transitions. [2022-07-13 21:57:02,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:02,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7277 transitions. [2022-07-13 21:57:02,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 346.5238095238095) internal successors, (7277), 21 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states 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 21:57:02,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states 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 21:57:02,938 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states 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 21:57:02,938 INFO L186 Difference]: Start difference. First operand has 377 places, 349 transitions, 794 flow. Second operand 21 states and 7277 transitions. [2022-07-13 21:57:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 373 transitions, 1000 flow [2022-07-13 21:57:02,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 373 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:02,944 INFO L242 Difference]: Finished difference. Result has 401 places, 362 transitions, 918 flow [2022-07-13 21:57:02,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=918, PETRI_PLACES=401, PETRI_TRANSITIONS=362} [2022-07-13 21:57:02,945 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 17 predicate places. [2022-07-13 21:57:02,946 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 362 transitions, 918 flow [2022-07-13 21:57:02,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 346.6111111111111) internal successors, (6239), 18 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states 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 21:57:02,946 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:02,947 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 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] [2022-07-13 21:57:02,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:03,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1154742421, now seen corresponding path program 1 times [2022-07-13 21:57:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:03,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942800987] [2022-07-13 21:57:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:03,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942800987] [2022-07-13 21:57:03,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942800987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94589172] [2022-07-13 21:57:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:03,294 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 21:57:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94589172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:03,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:03,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84352468] [2022-07-13 21:57:03,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:03,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:03,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:03,802 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 438 [2022-07-13 21:57:03,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 362 transitions, 918 flow. Second operand has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states 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 21:57:03,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:03,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 438 [2022-07-13 21:57:03,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:04,145 INFO L129 PetriNetUnfolder]: 0/415 cut-off events. [2022-07-13 21:57:04,145 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-13 21:57:04,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 415 events. 0/415 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 925 event pairs, 0 based on Foata normal form. 4/419 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-13 21:57:04,146 INFO L132 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 31 changer transitions 0/377 dead transitions. [2022-07-13 21:57:04,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 377 transitions, 1156 flow [2022-07-13 21:57:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:57:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:57:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11420 transitions. [2022-07-13 21:57:04,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7900927079009271 [2022-07-13 21:57:04,152 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11420 transitions. [2022-07-13 21:57:04,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11420 transitions. [2022-07-13 21:57:04,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:04,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11420 transitions. [2022-07-13 21:57:04,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 346.06060606060606) internal successors, (11420), 33 states have internal predecessors, (11420), 0 states have call successors, (0), 0 states 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 21:57:04,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states 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 21:57:04,170 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states 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 21:57:04,170 INFO L186 Difference]: Start difference. First operand has 401 places, 362 transitions, 918 flow. Second operand 33 states and 11420 transitions. [2022-07-13 21:57:04,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 377 transitions, 1156 flow [2022-07-13 21:57:04,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 377 transitions, 1090 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-13 21:57:04,176 INFO L242 Difference]: Finished difference. Result has 408 places, 359 transitions, 951 flow [2022-07-13 21:57:04,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=951, PETRI_PLACES=408, PETRI_TRANSITIONS=359} [2022-07-13 21:57:04,177 INFO L279 CegarLoopForPetriNet]: 384 programPoint places, 24 predicate places. [2022-07-13 21:57:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 359 transitions, 951 flow [2022-07-13 21:57:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 346.79411764705884) internal successors, (11791), 34 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states 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 21:57:04,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:04,179 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 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] [2022-07-13 21:57:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:04,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1867509715, now seen corresponding path program 1 times [2022-07-13 21:57:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:04,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133517173] [2022-07-13 21:57:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:04,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:04,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:04,445 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:04,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:04,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:04,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-13 21:57:04,446 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:57:04,446 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:04,446 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-13 21:57:04,472 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-13 21:57:04,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 414 places, 473 transitions, 1144 flow [2022-07-13 21:57:14,224 INFO L129 PetriNetUnfolder]: 11390/40738 cut-off events. [2022-07-13 21:57:14,225 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-13 21:57:16,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 40738 events. 11390/40738 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 481835 event pairs, 7181 based on Foata normal form. 0/36504 useless extension candidates. Maximal degree in co-relation 25375. Up to 11264 conditions per place. [2022-07-13 21:57:16,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 473 transitions, 1144 flow [2022-07-13 21:57:17,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 473 transitions, 1144 flow [2022-07-13 21:57:17,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:17,583 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@517b18d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a174e2c [2022-07-13 21:57:17,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:17,586 INFO L129 PetriNetUnfolder]: 3/87 cut-off events. [2022-07-13 21:57:17,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:17,586 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:17,587 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] [2022-07-13 21:57:17,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2111578409, now seen corresponding path program 1 times [2022-07-13 21:57:17,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:17,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217154297] [2022-07-13 21:57:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:17,596 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 21:57:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217154297] [2022-07-13 21:57:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217154297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:17,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:17,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385852287] [2022-07-13 21:57:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:17,598 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 473 [2022-07-13 21:57:17,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 473 transitions, 1144 flow. Second operand has 2 states, 2 states have (on average 379.5) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 21:57:17,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:17,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 473 [2022-07-13 21:57:17,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand