./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:42:40,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:42:40,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:42:40,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:42:40,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:42:40,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:42:40,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:42:40,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:42:40,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:42:40,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:42:40,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:42:40,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:42:40,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:42:40,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:42:40,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:42:40,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:42:40,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:42:40,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:42:40,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:42:40,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:42:40,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:42:40,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:42:40,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:42:40,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:42:40,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:42:40,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:42:40,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:42:40,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:42:40,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:42:40,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:42:40,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:42:40,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:42:40,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:42:40,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:42:40,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:42:40,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:42:40,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:42:40,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:42:40,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:42:40,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:42:40,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:42:40,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:42:40,239 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:42:40,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:42:40,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:42:40,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:42:40,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:42:40,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:42:40,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:42:40,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:42:40,243 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:42:40,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:42:40,244 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:42:40,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:42:40,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:42:40,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:42:40,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:42:40,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:42:40,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:42:40,245 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:42:40,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:42:40,245 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:42:40,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:42:40,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:42:40,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:42:40,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:42:40,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:42:40,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:42:40,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:42:40,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:42:40,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:42:40,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:42:40,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:42:40,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:42:40,248 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:42:40,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:42:40,248 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:42:40,249 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:42:40,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:42:40,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:42:40,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:42:40,567 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:42:40,567 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:42:40,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-30 17:42:41,709 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:42:41,927 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:42:41,931 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-30 17:42:41,951 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/181d6ee18/3e280a0e653644fea125d549532d4e5c/FLAGd2fd56da3 [2023-08-30 17:42:41,963 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/181d6ee18/3e280a0e653644fea125d549532d4e5c [2023-08-30 17:42:41,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:42:41,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:42:41,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:42:41,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:42:41,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:42:41,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:42:41" (1/1) ... [2023-08-30 17:42:41,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227a7bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:41, skipping insertion in model container [2023-08-30 17:42:41,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:42:41" (1/1) ... [2023-08-30 17:42:41,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:42:42,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:42:42,358 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-08-30 17:42:42,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:42:42,395 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:42:42,431 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2023-08-30 17:42:42,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:42:42,498 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:42:42,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42 WrapperNode [2023-08-30 17:42:42,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:42:42,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:42:42,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:42:42,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:42:42,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,563 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-30 17:42:42,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:42:42,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:42:42,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:42:42,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:42:42,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:42:42,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:42:42,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:42:42,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:42:42,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (1/1) ... [2023-08-30 17:42:42,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:42:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:42:42,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 17:42:42,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 17:42:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:42:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:42:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:42:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:42:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:42:42,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:42:42,671 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:42:42,770 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:42:42,772 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:42:42,982 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:42:42,989 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:42:42,989 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:42:42,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:42:42 BoogieIcfgContainer [2023-08-30 17:42:42,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:42:42,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:42:42,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:42:42,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:42:42,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:42:41" (1/3) ... [2023-08-30 17:42:42,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368aac11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:42:42, skipping insertion in model container [2023-08-30 17:42:42,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:42:42" (2/3) ... [2023-08-30 17:42:42,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368aac11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:42:42, skipping insertion in model container [2023-08-30 17:42:42,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:42:42" (3/3) ... [2023-08-30 17:42:42,999 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-08-30 17:42:43,007 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:42:43,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:42:43,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:42:43,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:42:43,067 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:42:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 220 flow [2023-08-30 17:42:43,168 INFO L130 PetriNetUnfolder]: 17/139 cut-off events. [2023-08-30 17:42:43,169 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:42:43,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 139 events. 17/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-30 17:42:43,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 220 flow [2023-08-30 17:42:43,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:43,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:43,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:43,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:43,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:43,223 INFO L130 PetriNetUnfolder]: 16/134 cut-off events. [2023-08-30 17:42:43,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:43,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 16/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 288 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-30 17:42:43,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-30 17:42:45,821 INFO L134 LiptonReduction]: Checked pairs total: 3727 [2023-08-30 17:42:45,821 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-30 17:42:45,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:42:45,840 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:42:45,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:42:45,843 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 17:42:45,843 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:45,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:45,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:42:45,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:42:45,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 12454527, now seen corresponding path program 1 times [2023-08-30 17:42:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005193417] [2023-08-30 17:42:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:46,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:42:46,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005193417] [2023-08-30 17:42:46,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005193417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:42:46,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:42:46,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:42:46,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156337826] [2023-08-30 17:42:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:42:46,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:42:46,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:42:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:42:46,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:42:46,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 187 [2023-08-30 17:42:46,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:42:46,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 187 [2023-08-30 17:42:46,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:42:46,314 INFO L130 PetriNetUnfolder]: 88/208 cut-off events. [2023-08-30 17:42:46,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:46,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 208 events. 88/208 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 875 event pairs, 0 based on Foata normal form. 21/193 useless extension candidates. Maximal degree in co-relation 391. Up to 188 conditions per place. [2023-08-30 17:42:46,317 INFO L137 encePairwiseOnDemand]: 175/187 looper letters, 21 selfloop transitions, 2 changer transitions 8/32 dead transitions. [2023-08-30 17:42:46,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 129 flow [2023-08-30 17:42:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:42:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:42:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-30 17:42:46,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525846702317291 [2023-08-30 17:42:46,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-30 17:42:46,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-30 17:42:46,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:42:46,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-30 17:42:46,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,345 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 310 transitions. [2023-08-30 17:42:46,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 129 flow [2023-08-30 17:42:46,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:42:46,350 INFO L231 Difference]: Finished difference. Result has 29 places, 16 transitions, 43 flow [2023-08-30 17:42:46,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2023-08-30 17:42:46,355 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-30 17:42:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 43 flow [2023-08-30 17:42:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:46,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:42:46,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:42:46,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:42:46,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1433079744, now seen corresponding path program 1 times [2023-08-30 17:42:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577141399] [2023-08-30 17:42:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:42:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577141399] [2023-08-30 17:42:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577141399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:42:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037760842] [2023-08-30 17:42:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:46,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:42:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:42:46,521 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) [2023-08-30 17:42:46,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:42:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:42:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:42:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:46,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:42:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037760842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:42:46,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:42:46,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:42:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623249319] [2023-08-30 17:42:46,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:42:46,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:42:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:42:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:42:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:42:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 187 [2023-08-30 17:42:46,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 43 flow. Second operand has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:42:46,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 187 [2023-08-30 17:42:46,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:42:46,784 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-30 17:42:46,785 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:42:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 46 events. 16/46 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-30 17:42:46,785 INFO L137 encePairwiseOnDemand]: 184/187 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 17:42:46,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-08-30 17:42:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:42:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:42:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-08-30 17:42:46,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2023-08-30 17:42:46,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-08-30 17:42:46,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-08-30 17:42:46,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:42:46,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-08-30 17:42:46,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,806 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,806 INFO L175 Difference]: Start difference. First operand has 29 places, 16 transitions, 43 flow. Second operand 4 states and 370 transitions. [2023-08-30 17:42:46,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-08-30 17:42:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:42:46,807 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-30 17:42:46,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-30 17:42:46,808 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-30 17:42:46,808 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-30 17:42:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:46,811 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:42:46,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:42:47,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:42:47,012 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:42:47,014 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:42:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 220 flow [2023-08-30 17:42:47,031 INFO L130 PetriNetUnfolder]: 17/139 cut-off events. [2023-08-30 17:42:47,031 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:42:47,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 139 events. 17/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-30 17:42:47,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 220 flow [2023-08-30 17:42:47,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:47,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:47,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:47,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 101 transitions, 207 flow [2023-08-30 17:42:47,045 INFO L130 PetriNetUnfolder]: 16/134 cut-off events. [2023-08-30 17:42:47,045 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:47,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 16/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 288 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-30 17:42:47,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-30 17:42:49,449 INFO L134 LiptonReduction]: Checked pairs total: 3575 [2023-08-30 17:42:49,450 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-30 17:42:49,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:42:49,453 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:42:49,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:42:49,456 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-30 17:42:49,456 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:49,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:49,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:42:49,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:42:49,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:49,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1554284883, now seen corresponding path program 1 times [2023-08-30 17:42:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:49,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213251559] [2023-08-30 17:42:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:42:49,495 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:42:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:42:49,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:42:49,531 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:42:49,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:42:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:42:49,532 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:42:49,533 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:42:49,533 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:42:49,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:42:49,554 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:42:49,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,575 INFO L130 PetriNetUnfolder]: 31/226 cut-off events. [2023-08-30 17:42:49,576 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:42:49,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-30 17:42:49,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:49,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:49,597 INFO L130 PetriNetUnfolder]: 31/226 cut-off events. [2023-08-30 17:42:49,598 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:42:49,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-30 17:42:49,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-30 17:42:52,062 INFO L134 LiptonReduction]: Checked pairs total: 15612 [2023-08-30 17:42:52,062 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 17:42:52,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:42:52,065 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:42:52,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:42:52,067 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 17:42:52,067 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:52,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:52,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:42:52,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:42:52,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash 23074324, now seen corresponding path program 1 times [2023-08-30 17:42:52,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:52,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11460768] [2023-08-30 17:42:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:52,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:42:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11460768] [2023-08-30 17:42:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11460768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:42:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:42:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:42:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233864921] [2023-08-30 17:42:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:42:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:42:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:42:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:42:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:42:52,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 231 [2023-08-30 17:42:52,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:42:52,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 231 [2023-08-30 17:42:52,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:42:52,344 INFO L130 PetriNetUnfolder]: 1376/2498 cut-off events. [2023-08-30 17:42:52,344 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 17:42:52,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 2498 events. 1376/2498 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15256 event pairs, 648 based on Foata normal form. 569/2763 useless extension candidates. Maximal degree in co-relation 645. Up to 2257 conditions per place. [2023-08-30 17:42:52,353 INFO L137 encePairwiseOnDemand]: 213/231 looper letters, 28 selfloop transitions, 2 changer transitions 11/50 dead transitions. [2023-08-30 17:42:52,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-08-30 17:42:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:42:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:42:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-08-30 17:42:52,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642135642135642 [2023-08-30 17:42:52,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-08-30 17:42:52,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-08-30 17:42:52,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:42:52,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-08-30 17:42:52,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,361 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 391 transitions. [2023-08-30 17:42:52,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-08-30 17:42:52,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:42:52,363 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-30 17:42:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-30 17:42:52,364 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-30 17:42:52,365 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-30 17:42:52,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:52,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:42:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:42:52,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:42:52,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2013097128, now seen corresponding path program 1 times [2023-08-30 17:42:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196752058] [2023-08-30 17:42:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:42:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196752058] [2023-08-30 17:42:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196752058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:42:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830818693] [2023-08-30 17:42:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:52,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:42:52,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:42:52,412 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) [2023-08-30 17:42:52,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:42:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:42:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:42:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:52,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:42:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830818693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:42:52,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:42:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:42:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663772205] [2023-08-30 17:42:52,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:42:52,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:42:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:42:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:42:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:42:52,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 231 [2023-08-30 17:42:52,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:42:52,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 231 [2023-08-30 17:42:52,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:42:52,644 INFO L130 PetriNetUnfolder]: 286/546 cut-off events. [2023-08-30 17:42:52,644 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2023-08-30 17:42:52,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 546 events. 286/546 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2566 event pairs, 49 based on Foata normal form. 70/616 useless extension candidates. Maximal degree in co-relation 166. Up to 346 conditions per place. [2023-08-30 17:42:52,646 INFO L137 encePairwiseOnDemand]: 228/231 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-30 17:42:52,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 202 flow [2023-08-30 17:42:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:42:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:42:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-30 17:42:52,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099567099567099 [2023-08-30 17:42:52,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-30 17:42:52,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-30 17:42:52,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:42:52,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-30 17:42:52,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,654 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,655 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 5 states and 589 transitions. [2023-08-30 17:42:52,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 202 flow [2023-08-30 17:42:52,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:42:52,656 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:42:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-30 17:42:52,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-08-30 17:42:52,657 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:42:52,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:52,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:42:52,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:42:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:42:52,864 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:42:52,865 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:42:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,885 INFO L130 PetriNetUnfolder]: 31/226 cut-off events. [2023-08-30 17:42:52,886 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:42:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-30 17:42:52,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:52,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-30 17:42:52,906 INFO L130 PetriNetUnfolder]: 31/226 cut-off events. [2023-08-30 17:42:52,907 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:42:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-30 17:42:52,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-30 17:42:55,258 INFO L134 LiptonReduction]: Checked pairs total: 15492 [2023-08-30 17:42:55,258 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 17:42:55,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:42:55,260 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:42:55,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:42:55,265 INFO L130 PetriNetUnfolder]: 12/60 cut-off events. [2023-08-30 17:42:55,265 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:42:55,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:55,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:42:55,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:42:55,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash -97876852, now seen corresponding path program 1 times [2023-08-30 17:42:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:55,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566897450] [2023-08-30 17:42:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:42:55,283 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:42:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:42:55,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:42:55,296 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:42:55,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:42:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:42:55,296 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:42:55,297 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:42:55,297 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:42:55,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:42:55,317 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:42:55,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,345 INFO L130 PetriNetUnfolder]: 50/344 cut-off events. [2023-08-30 17:42:55,345 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:42:55,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 344 events. 50/344 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1037 event pairs, 1 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 234. Up to 16 conditions per place. [2023-08-30 17:42:55,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:42:55,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:42:55,374 INFO L130 PetriNetUnfolder]: 50/344 cut-off events. [2023-08-30 17:42:55,374 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:42:55,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 344 events. 50/344 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1037 event pairs, 1 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 234. Up to 16 conditions per place. [2023-08-30 17:42:55,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-08-30 17:42:57,824 INFO L134 LiptonReduction]: Checked pairs total: 33416 [2023-08-30 17:42:57,824 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-30 17:42:57,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:42:57,833 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:42:57,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:42:57,835 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-08-30 17:42:57,835 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:42:57,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:42:57,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:42:57,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:42:57,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:42:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 35417498, now seen corresponding path program 1 times [2023-08-30 17:42:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:42:57,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058317570] [2023-08-30 17:42:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:42:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:42:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:42:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:42:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:42:57,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058317570] [2023-08-30 17:42:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058317570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:42:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:42:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:42:57,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902715300] [2023-08-30 17:42:57,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:42:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:42:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:42:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:42:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:42:57,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 276 [2023-08-30 17:42:57,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:42:57,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:42:57,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 276 [2023-08-30 17:42:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:00,869 INFO L130 PetriNetUnfolder]: 25911/38927 cut-off events. [2023-08-30 17:43:00,870 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-08-30 17:43:00,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76221 conditions, 38927 events. 25911/38927 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 271385 event pairs, 16705 based on Foata normal form. 8551/43652 useless extension candidates. Maximal degree in co-relation 6185. Up to 36545 conditions per place. [2023-08-30 17:43:00,986 INFO L137 encePairwiseOnDemand]: 252/276 looper letters, 41 selfloop transitions, 2 changer transitions 12/65 dead transitions. [2023-08-30 17:43:00,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 266 flow [2023-08-30 17:43:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:43:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:43:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-30 17:43:00,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2023-08-30 17:43:00,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-30 17:43:00,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-30 17:43:00,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:00,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-30 17:43:00,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:00,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:00,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:00,993 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 477 transitions. [2023-08-30 17:43:00,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 266 flow [2023-08-30 17:43:00,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:43:00,996 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 113 flow [2023-08-30 17:43:00,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-30 17:43:00,997 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-30 17:43:00,997 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 113 flow [2023-08-30 17:43:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:00,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:00,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:43:00,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:00,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 431580926, now seen corresponding path program 1 times [2023-08-30 17:43:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246366465] [2023-08-30 17:43:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246366465] [2023-08-30 17:43:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246366465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:43:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408494535] [2023-08-30 17:43:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:01,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:01,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:43:01,121 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) [2023-08-30 17:43:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:43:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:43:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:43:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:01,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:43:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:01,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408494535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:43:01,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:43:01,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:43:01,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866671798] [2023-08-30 17:43:01,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:43:01,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:43:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:43:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:43:01,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 276 [2023-08-30 17:43:01,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:01,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:01,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 276 [2023-08-30 17:43:01,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:01,731 INFO L130 PetriNetUnfolder]: 5560/8248 cut-off events. [2023-08-30 17:43:01,731 INFO L131 PetriNetUnfolder]: For 1296/1296 co-relation queries the response was YES. [2023-08-30 17:43:01,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17456 conditions, 8248 events. 5560/8248 cut-off events. For 1296/1296 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 47418 event pairs, 630 based on Foata normal form. 819/9049 useless extension candidates. Maximal degree in co-relation 1994. Up to 5346 conditions per place. [2023-08-30 17:43:01,745 INFO L137 encePairwiseOnDemand]: 273/276 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-30 17:43:01,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 377 flow [2023-08-30 17:43:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:43:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:43:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 872 transitions. [2023-08-30 17:43:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265700483091788 [2023-08-30 17:43:01,749 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 872 transitions. [2023-08-30 17:43:01,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 872 transitions. [2023-08-30 17:43:01,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:01,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 872 transitions. [2023-08-30 17:43:01,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.33333333333334) internal successors, (872), 6 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) [2023-08-30 17:43:01,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:01,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:01,755 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 113 flow. Second operand 6 states and 872 transitions. [2023-08-30 17:43:01,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 377 flow [2023-08-30 17:43:01,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 93 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:43:01,759 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:43:01,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-30 17:43:01,762 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-30 17:43:01,762 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:43:01,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:01,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:43:01,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 17:43:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:01,968 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:43:01,969 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:43:01,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:01,997 INFO L130 PetriNetUnfolder]: 50/344 cut-off events. [2023-08-30 17:43:01,997 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:43:01,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 344 events. 50/344 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1037 event pairs, 1 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 234. Up to 16 conditions per place. [2023-08-30 17:43:01,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:02,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:02,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:02,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:02,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:02,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 166 transitions, 362 flow [2023-08-30 17:43:02,073 INFO L130 PetriNetUnfolder]: 50/344 cut-off events. [2023-08-30 17:43:02,073 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:43:02,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 344 events. 50/344 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1037 event pairs, 1 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 234. Up to 16 conditions per place. [2023-08-30 17:43:02,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-08-30 17:43:04,310 INFO L134 LiptonReduction]: Checked pairs total: 33188 [2023-08-30 17:43:04,310 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-30 17:43:04,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:43:04,312 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:04,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:43:04,317 INFO L130 PetriNetUnfolder]: 22/97 cut-off events. [2023-08-30 17:43:04,318 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:43:04,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:04,318 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:43:04,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:43:04,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash -743160108, now seen corresponding path program 1 times [2023-08-30 17:43:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:04,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426355455] [2023-08-30 17:43:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:04,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:04,332 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:43:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:04,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:43:04,344 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:43:04,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:43:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:43:04,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:43:04,345 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:43:04,346 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:43:04,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:43:04,362 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:43:04,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,408 INFO L130 PetriNetUnfolder]: 81/526 cut-off events. [2023-08-30 17:43:04,409 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:43:04,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 526 events. 81/526 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1911 event pairs, 6 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 364. Up to 32 conditions per place. [2023-08-30 17:43:04,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:04,415 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,415 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:04,456 INFO L130 PetriNetUnfolder]: 81/526 cut-off events. [2023-08-30 17:43:04,456 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:43:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 526 events. 81/526 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1911 event pairs, 6 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 364. Up to 32 conditions per place. [2023-08-30 17:43:04,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-08-30 17:43:06,907 INFO L134 LiptonReduction]: Checked pairs total: 62273 [2023-08-30 17:43:06,907 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 17:43:06,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:43:06,909 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:06,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:43:06,910 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 17:43:06,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:43:06,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:06,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:43:06,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:06,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 49608643, now seen corresponding path program 1 times [2023-08-30 17:43:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:06,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135287164] [2023-08-30 17:43:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135287164] [2023-08-30 17:43:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135287164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:43:06,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:43:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:43:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487138563] [2023-08-30 17:43:06,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:43:06,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:43:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:43:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:43:06,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 321 [2023-08-30 17:43:06,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:06,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:06,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 321 [2023-08-30 17:43:06,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:26,654 INFO L130 PetriNetUnfolder]: 230525/321526 cut-off events. [2023-08-30 17:43:26,655 INFO L131 PetriNetUnfolder]: For 12215/12215 co-relation queries the response was YES. [2023-08-30 17:43:27,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630108 conditions, 321526 events. 230525/321526 cut-off events. For 12215/12215 co-relation queries the response was YES. Maximal size of possible extension queue 7337. Compared 2528479 event pairs, 170178 based on Foata normal form. 60141/356337 useless extension candidates. Maximal degree in co-relation 60884. Up to 301798 conditions per place. [2023-08-30 17:43:27,722 INFO L137 encePairwiseOnDemand]: 291/321 looper letters, 46 selfloop transitions, 2 changer transitions 13/77 dead transitions. [2023-08-30 17:43:27,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 316 flow [2023-08-30 17:43:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:43:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:43:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-08-30 17:43:27,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763239875389408 [2023-08-30 17:43:27,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-08-30 17:43:27,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-08-30 17:43:27,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:27,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-08-30 17:43:27,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:27,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:27,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:27,729 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 555 transitions. [2023-08-30 17:43:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 316 flow [2023-08-30 17:43:27,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:43:27,734 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 146 flow [2023-08-30 17:43:27,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2023-08-30 17:43:27,735 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 17:43:27,735 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 146 flow [2023-08-30 17:43:27,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:27,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:27,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:27,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:43:27,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:27,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1182095284, now seen corresponding path program 1 times [2023-08-30 17:43:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:27,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555492889] [2023-08-30 17:43:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555492889] [2023-08-30 17:43:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555492889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:43:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567776582] [2023-08-30 17:43:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:43:27,784 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) [2023-08-30 17:43:27,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:43:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:43:27,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:43:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:27,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:43:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:27,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567776582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:43:27,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:43:27,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:43:27,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800152255] [2023-08-30 17:43:27,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:43:27,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:43:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:43:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:43:27,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 321 [2023-08-30 17:43:27,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:27,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:27,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 321 [2023-08-30 17:43:27,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:35,142 INFO L130 PetriNetUnfolder]: 96934/131885 cut-off events. [2023-08-30 17:43:35,142 INFO L131 PetriNetUnfolder]: For 12432/12432 co-relation queries the response was YES. [2023-08-30 17:43:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270880 conditions, 131885 events. 96934/131885 cut-off events. For 12432/12432 co-relation queries the response was YES. Maximal size of possible extension queue 3457. Compared 920134 event pairs, 13696 based on Foata normal form. 584/132341 useless extension candidates. Maximal degree in co-relation 34772. Up to 83201 conditions per place. [2023-08-30 17:43:35,765 INFO L137 encePairwiseOnDemand]: 317/321 looper letters, 111 selfloop transitions, 5 changer transitions 1/133 dead transitions. [2023-08-30 17:43:35,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 133 transitions, 538 flow [2023-08-30 17:43:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:43:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:43:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-08-30 17:43:35,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389408099688473 [2023-08-30 17:43:35,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-08-30 17:43:35,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-08-30 17:43:35,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:35,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-08-30 17:43:35,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 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) [2023-08-30 17:43:35,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:35,780 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:35,780 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 146 flow. Second operand 6 states and 1038 transitions. [2023-08-30 17:43:35,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 133 transitions, 538 flow [2023-08-30 17:43:35,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 133 transitions, 530 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:43:35,788 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-30 17:43:35,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-30 17:43:35,789 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-30 17:43:35,790 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-30 17:43:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:35,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:35,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:35,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 17:43:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:35,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:35,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1827445599, now seen corresponding path program 1 times [2023-08-30 17:43:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:35,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194210816] [2023-08-30 17:43:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-30 17:43:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194210816] [2023-08-30 17:43:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194210816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:43:36,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:43:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:43:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813322419] [2023-08-30 17:43:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:43:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:43:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:43:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:43:36,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 321 [2023-08-30 17:43:36,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:36,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:36,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 321 [2023-08-30 17:43:36,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:45,051 INFO L130 PetriNetUnfolder]: 116044/156865 cut-off events. [2023-08-30 17:43:45,051 INFO L131 PetriNetUnfolder]: For 112884/112884 co-relation queries the response was YES. [2023-08-30 17:43:45,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359760 conditions, 156865 events. 116044/156865 cut-off events. For 112884/112884 co-relation queries the response was YES. Maximal size of possible extension queue 3687. Compared 1073530 event pairs, 59668 based on Foata normal form. 81/156863 useless extension candidates. Maximal degree in co-relation 278234. Up to 149797 conditions per place. [2023-08-30 17:43:45,851 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 62 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-30 17:43:45,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 398 flow [2023-08-30 17:43:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:43:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:43:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-30 17:43:45,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285565939771547 [2023-08-30 17:43:45,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-30 17:43:45,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-30 17:43:45,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:45,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-30 17:43:45,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:45,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:45,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:45,856 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 3 states and 509 transitions. [2023-08-30 17:43:45,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 398 flow [2023-08-30 17:43:45,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 378 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 17:43:45,883 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 194 flow [2023-08-30 17:43:45,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-30 17:43:45,883 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-30 17:43:45,884 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 194 flow [2023-08-30 17:43:45,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:45,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:45,884 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:45,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:43:45,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:45,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 791835587, now seen corresponding path program 1 times [2023-08-30 17:43:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:45,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038958412] [2023-08-30 17:43:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:45,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038958412] [2023-08-30 17:43:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038958412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:43:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024109222] [2023-08-30 17:43:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:45,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:43:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:43:45,979 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) [2023-08-30 17:43:45,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:43:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:46,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:43:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:43:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:46,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:43:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024109222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:43:46,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:43:46,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:43:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550935215] [2023-08-30 17:43:46,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:43:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:43:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:43:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:43:46,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 321 [2023-08-30 17:43:46,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:46,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:46,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 321 [2023-08-30 17:43:46,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:43:49,198 INFO L130 PetriNetUnfolder]: 35752/50591 cut-off events. [2023-08-30 17:43:49,199 INFO L131 PetriNetUnfolder]: For 38291/38291 co-relation queries the response was YES. [2023-08-30 17:43:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112190 conditions, 50591 events. 35752/50591 cut-off events. For 38291/38291 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 342924 event pairs, 767 based on Foata normal form. 5157/55528 useless extension candidates. Maximal degree in co-relation 66420. Up to 23220 conditions per place. [2023-08-30 17:43:49,315 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 0 selfloop transitions, 0 changer transitions 139/139 dead transitions. [2023-08-30 17:43:49,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 621 flow [2023-08-30 17:43:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:43:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:43:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1185 transitions. [2023-08-30 17:43:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527369826435247 [2023-08-30 17:43:49,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1185 transitions. [2023-08-30 17:43:49,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1185 transitions. [2023-08-30 17:43:49,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:43:49,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1185 transitions. [2023-08-30 17:43:49,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.28571428571428) internal successors, (1185), 7 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:49,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:49,325 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:49,325 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 194 flow. Second operand 7 states and 1185 transitions. [2023-08-30 17:43:49,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 621 flow [2023-08-30 17:43:49,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 601 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 17:43:49,333 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-30 17:43:49,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-30 17:43:49,333 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-30 17:43:49,334 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-30 17:43:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:49,335 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:43:49,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:43:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 17:43:49,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:43:49,540 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:43:49,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,574 INFO L130 PetriNetUnfolder]: 81/526 cut-off events. [2023-08-30 17:43:49,575 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:43:49,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 526 events. 81/526 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1911 event pairs, 6 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 364. Up to 32 conditions per place. [2023-08-30 17:43:49,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:49,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 196 transitions, 436 flow [2023-08-30 17:43:49,610 INFO L130 PetriNetUnfolder]: 81/526 cut-off events. [2023-08-30 17:43:49,610 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:43:49,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 526 events. 81/526 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1911 event pairs, 6 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 364. Up to 32 conditions per place. [2023-08-30 17:43:49,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-08-30 17:43:51,991 INFO L134 LiptonReduction]: Checked pairs total: 62273 [2023-08-30 17:43:51,992 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 17:43:51,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:43:51,993 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:51,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:43:51,999 INFO L130 PetriNetUnfolder]: 33/140 cut-off events. [2023-08-30 17:43:52,000 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:43:52,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:52,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:43:52,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:43:52,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -36810051, now seen corresponding path program 1 times [2023-08-30 17:43:52,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:52,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046737062] [2023-08-30 17:43:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:52,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:43:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:43:52,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:43:52,046 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:43:52,046 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:43:52,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:43:52,046 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:43:52,049 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:43:52,049 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:43:52,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:43:52,078 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:43:52,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,168 INFO L130 PetriNetUnfolder]: 140/840 cut-off events. [2023-08-30 17:43:52,169 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:43:52,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 840 events. 140/840 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3585 event pairs, 23 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 571. Up to 80 conditions per place. [2023-08-30 17:43:52,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,181 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:43:52,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 226 transitions, 512 flow [2023-08-30 17:43:52,420 INFO L130 PetriNetUnfolder]: 140/840 cut-off events. [2023-08-30 17:43:52,420 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:43:52,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 840 events. 140/840 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3585 event pairs, 23 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 571. Up to 80 conditions per place. [2023-08-30 17:43:52,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-08-30 17:43:54,882 INFO L134 LiptonReduction]: Checked pairs total: 94562 [2023-08-30 17:43:54,882 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 17:43:54,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:43:54,884 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28726f09, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:43:54,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:43:54,885 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 17:43:54,885 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:43:54,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:43:54,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:43:54,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:43:54,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:43:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 65646673, now seen corresponding path program 1 times [2023-08-30 17:43:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:43:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563156624] [2023-08-30 17:43:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:43:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:43:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:43:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:43:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:43:54,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563156624] [2023-08-30 17:43:54,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563156624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:43:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:43:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:43:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598006378] [2023-08-30 17:43:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:43:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:43:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:43:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:43:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:43:54,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 366 [2023-08-30 17:43:54,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:43:54,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:43:54,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 366 [2023-08-30 17:43:54,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand