./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.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_41-trylock_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --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 17:54:15,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:54:15,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:54:15,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:54:15,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:54:15,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:54:15,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:54:15,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:54:15,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:54:15,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:54:15,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:54:15,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:54:15,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:54:15,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:54:15,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:54:15,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:54:15,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:54:15,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:54:15,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:54:15,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:54:15,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:54:15,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:54:15,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:54:15,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:54:15,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:54:15,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:54:15,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:54:15,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:54:15,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:54:15,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:54:15,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:54:15,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:54:15,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:54:15,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:54:15,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:54:15,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:54:15,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:54:15,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:54:15,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:54:15,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:54:15,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:54:15,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:54:15,215 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:54:15,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:54:15,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:54:15,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:54:15,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:54:15,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:54:15,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:54:15,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:54:15,217 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:54:15,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:54:15,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:54:15,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:54:15,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:54:15,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:54:15,219 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:54:15,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:54:15,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:54:15,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:54:15,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:54:15,221 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:54:15,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:54:15,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:54:15,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:54:15,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:54:15,463 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:54:15,463 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:54:15,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-30 17:54:16,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:54:16,608 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:54:16,609 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-30 17:54:16,616 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c2fefa69/6795d74ba62f4bf38b7054c73370c9c4/FLAG3d89c2c4e [2023-08-30 17:54:16,627 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c2fefa69/6795d74ba62f4bf38b7054c73370c9c4 [2023-08-30 17:54:16,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:54:16,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:54:16,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:54:16,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:54:16,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:54:16,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:54:16" (1/1) ... [2023-08-30 17:54:16,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41546d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:16, skipping insertion in model container [2023-08-30 17:54:16,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:54:16" (1/1) ... [2023-08-30 17:54:16,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:54:16,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:54:16,920 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_41-trylock_racefree.i[30176,30189] [2023-08-30 17:54:16,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:54:16,950 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:54:16,981 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_41-trylock_racefree.i[30176,30189] [2023-08-30 17:54:16,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:54:17,022 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:54:17,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17 WrapperNode [2023-08-30 17:54:17,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:54:17,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:54:17,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:54:17,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:54:17,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,070 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-30 17:54:17,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:54:17,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:54:17,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:54:17,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:54:17,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:54:17,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:54:17,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:54:17,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:54:17,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (1/1) ... [2023-08-30 17:54:17,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:54:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:17,127 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 17:54:17,128 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 17:54:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:54:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:54:17,147 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:54:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:54:17,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:54:17,148 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 17:54:17,261 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:54:17,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:54:17,431 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:54:17,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:54:17,436 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 17:54:17,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:54:17 BoogieIcfgContainer [2023-08-30 17:54:17,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:54:17,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:54:17,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:54:17,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:54:17,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:54:16" (1/3) ... [2023-08-30 17:54:17,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0bada9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:54:17, skipping insertion in model container [2023-08-30 17:54:17,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:17" (2/3) ... [2023-08-30 17:54:17,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0bada9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:54:17, skipping insertion in model container [2023-08-30 17:54:17,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:54:17" (3/3) ... [2023-08-30 17:54:17,443 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-30 17:54:17,447 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:54:17,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:54:17,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:54:17,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:54:17,485 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:54:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-08-30 17:54:17,544 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-08-30 17:54:17,544 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:54:17,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 17:54:17,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-08-30 17:54:17,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:17,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:17,564 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:17,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:17,583 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-08-30 17:54:17,583 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:17,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 17:54:17,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-08-30 17:54:19,252 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-08-30 17:54:19,253 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-30 17:54:19,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:19,266 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:19,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:19,271 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 17:54:19,272 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:19,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:19,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:54:19,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:19,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 383557292, now seen corresponding path program 1 times [2023-08-30 17:54:19,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:19,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679242279] [2023-08-30 17:54:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:19,416 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 17:54:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679242279] [2023-08-30 17:54:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679242279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:19,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:19,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207073151] [2023-08-30 17:54:19,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:19,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-30 17:54:19,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 17:54:19,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:19,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-30 17:54:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:19,512 INFO L130 PetriNetUnfolder]: 89/209 cut-off events. [2023-08-30 17:54:19,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:19,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 842 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-08-30 17:54:19,517 INFO L137 encePairwiseOnDemand]: 170/181 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-08-30 17:54:19,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 131 flow [2023-08-30 17:54:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-30 17:54:19,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469613259668509 [2023-08-30 17:54:19,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-30 17:54:19,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-30 17:54:19,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:19,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-30 17:54:19,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 17:54:19,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 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 17:54:19,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 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 17:54:19,544 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 297 transitions. [2023-08-30 17:54:19,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 131 flow [2023-08-30 17:54:19,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:19,548 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-30 17:54:19,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 17:54:19,552 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-30 17:54:19,552 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-30 17:54:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 17:54:19,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:19,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:19,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:54:19,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:19,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1427432239, now seen corresponding path program 1 times [2023-08-30 17:54:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:19,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843144559] [2023-08-30 17:54:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:19,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:19,673 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 17:54:19,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843144559] [2023-08-30 17:54:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843144559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809592889] [2023-08-30 17:54:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:19,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:19,676 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 17:54:19,677 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 17:54:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:19,795 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 17:54:19,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:19,807 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 17:54:19,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809592889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:19,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:19,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040432840] [2023-08-30 17:54:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:19,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:19,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-08-30 17:54:19,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 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 17:54:19,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:19,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-08-30 17:54:19,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:19,859 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-30 17:54:19,860 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:54:19,860 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 17:54:19,860 INFO L137 encePairwiseOnDemand]: 178/181 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 17:54:19,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-08-30 17:54:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:54:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:54:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2023-08-30 17:54:19,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889502762430939 [2023-08-30 17:54:19,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2023-08-30 17:54:19,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2023-08-30 17:54:19,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:19,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2023-08-30 17:54:19,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 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 17:54:19,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 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 17:54:19,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 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 17:54:19,867 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 354 transitions. [2023-08-30 17:54:19,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-08-30 17:54:19,868 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 17:54:19,868 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-30 17:54:19,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, 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 17:54:19,869 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-30 17:54:19,869 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-30 17:54:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 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 17:54:19,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:54:19,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:54:20,075 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 17:54:20,075 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:54:20,077 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:54:20,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-08-30 17:54:20,087 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-08-30 17:54:20,087 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:54:20,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 17:54:20,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-08-30 17:54:20,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:20,088 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:20,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:20,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:20,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-08-30 17:54:20,095 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-08-30 17:54:20,095 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:20,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 17:54:20,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-08-30 17:54:21,607 INFO L134 LiptonReduction]: Checked pairs total: 3405 [2023-08-30 17:54:21,607 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-30 17:54:21,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:54:21,609 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:21,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:21,611 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-08-30 17:54:21,611 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:21,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:21,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:54:21,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:54:21,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1353910618, now seen corresponding path program 1 times [2023-08-30 17:54:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:21,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734130267] [2023-08-30 17:54:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:21,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:21,633 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:54:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:21,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:54:21,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:54:21,664 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:54:21,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:54:21,664 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:54:21,664 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:54:21,665 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:54:21,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:54:21,676 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:54:21,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,689 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-30 17:54:21,689 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:21,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-30 17:54:21,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:21,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:21,703 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-30 17:54:21,703 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:21,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-30 17:54:21,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-08-30 17:54:23,298 INFO L134 LiptonReduction]: Checked pairs total: 16435 [2023-08-30 17:54:23,298 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-30 17:54:23,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:23,301 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:23,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:23,302 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 17:54:23,302 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:23,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:23,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:54:23,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:23,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash 701192273, now seen corresponding path program 1 times [2023-08-30 17:54:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:23,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646469293] [2023-08-30 17:54:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:23,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:23,321 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 17:54:23,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:23,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646469293] [2023-08-30 17:54:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646469293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:23,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:23,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128830915] [2023-08-30 17:54:23,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:23,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:23,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:23,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 224 [2023-08-30 17:54:23,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 17:54:23,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:23,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 224 [2023-08-30 17:54:23,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:23,516 INFO L130 PetriNetUnfolder]: 1665/2829 cut-off events. [2023-08-30 17:54:23,516 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 17:54:23,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16010 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-08-30 17:54:23,525 INFO L137 encePairwiseOnDemand]: 206/224 looper letters, 32 selfloop transitions, 2 changer transitions 10/52 dead transitions. [2023-08-30 17:54:23,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-08-30 17:54:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 17:54:23,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2023-08-30 17:54:23,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 17:54:23,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 17:54:23,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:23,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 17:54:23,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 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 17:54:23,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 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 17:54:23,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 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 17:54:23,554 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 382 transitions. [2023-08-30 17:54:23,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-08-30 17:54:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:23,556 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 86 flow [2023-08-30 17:54:23,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-30 17:54:23,557 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-30 17:54:23,557 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 86 flow [2023-08-30 17:54:23,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 17:54:23,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:23,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:23,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:54:23,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:23,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1040326354, now seen corresponding path program 1 times [2023-08-30 17:54:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109337965] [2023-08-30 17:54:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:23,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:23,594 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 17:54:23,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:23,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109337965] [2023-08-30 17:54:23,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109337965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097000140] [2023-08-30 17:54:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:23,597 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 17:54:23,604 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 17:54:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:23,653 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 17:54:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:23,670 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 17:54:23,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097000140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:23,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:23,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457939139] [2023-08-30 17:54:23,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:23,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 224 [2023-08-30 17:54:23,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 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 17:54:23,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:23,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 224 [2023-08-30 17:54:23,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:23,751 INFO L130 PetriNetUnfolder]: 331/599 cut-off events. [2023-08-30 17:54:23,752 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 17:54:23,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 599 events. 331/599 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2769 event pairs, 50 based on Foata normal form. 80/676 useless extension candidates. Maximal degree in co-relation 905. Up to 398 conditions per place. [2023-08-30 17:54:23,753 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 0 selfloop transitions, 0 changer transitions 53/53 dead transitions. [2023-08-30 17:54:23,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 212 flow [2023-08-30 17:54:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:54:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:54:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2023-08-30 17:54:23,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2023-08-30 17:54:23,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2023-08-30 17:54:23,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2023-08-30 17:54:23,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:23,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2023-08-30 17:54:23,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:54:23,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 17:54:23,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 17:54:23,760 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 86 flow. Second operand 5 states and 572 transitions. [2023-08-30 17:54:23,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 212 flow [2023-08-30 17:54:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:54:23,762 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:54:23,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, 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 17:54:23,765 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2023-08-30 17:54:23,766 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:54:23,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 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 17:54:23,766 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:54:23,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 17:54:23,970 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 17:54:23,971 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:54:23,971 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:54:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:23,983 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-30 17:54:23,983 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:23,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-30 17:54:23,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:23,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:23,984 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:23,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:23,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:23,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-30 17:54:24,011 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-30 17:54:24,011 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:24,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-30 17:54:24,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-08-30 17:54:25,515 INFO L134 LiptonReduction]: Checked pairs total: 16417 [2023-08-30 17:54:25,515 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-30 17:54:25,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:54:25,517 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:25,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:25,520 INFO L130 PetriNetUnfolder]: 13/59 cut-off events. [2023-08-30 17:54:25,520 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:54:25,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:25,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:54:25,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:54:25,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 419103144, now seen corresponding path program 1 times [2023-08-30 17:54:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871576334] [2023-08-30 17:54:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:25,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:54:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:25,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:54:25,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:54:25,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:54:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:54:25,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:54:25,556 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:54:25,556 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:54:25,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:54:25,573 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:54:25,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,592 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-30 17:54:25,592 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:25,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-30 17:54:25,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:25,596 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:25,613 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-30 17:54:25,613 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-30 17:54:25,621 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-08-30 17:54:27,220 INFO L134 LiptonReduction]: Checked pairs total: 29489 [2023-08-30 17:54:27,220 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-30 17:54:27,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:27,221 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:27,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:27,223 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 17:54:27,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:27,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:27,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:54:27,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:27,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1074176198, now seen corresponding path program 1 times [2023-08-30 17:54:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899155770] [2023-08-30 17:54:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:27,250 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 17:54:27,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899155770] [2023-08-30 17:54:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899155770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:27,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:27,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:27,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062775098] [2023-08-30 17:54:27,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:27,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:27,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 269 [2023-08-30 17:54:27,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:54:27,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:27,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 269 [2023-08-30 17:54:27,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:29,194 INFO L130 PetriNetUnfolder]: 21048/32110 cut-off events. [2023-08-30 17:54:29,194 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2023-08-30 17:54:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 32110 events. 21048/32110 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 227786 event pairs, 12977 based on Foata normal form. 5716/34332 useless extension candidates. Maximal degree in co-relation 6327. Up to 29586 conditions per place. [2023-08-30 17:54:29,276 INFO L137 encePairwiseOnDemand]: 245/269 looper letters, 41 selfloop transitions, 2 changer transitions 11/66 dead transitions. [2023-08-30 17:54:29,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 266 flow [2023-08-30 17:54:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 17:54:29,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749690210656754 [2023-08-30 17:54:29,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 17:54:29,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 17:54:29,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:29,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 17:54:29,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 17:54:29,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:54:29,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:54:29,280 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 464 transitions. [2023-08-30 17:54:29,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 266 flow [2023-08-30 17:54:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:29,283 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 117 flow [2023-08-30 17:54:29,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-30 17:54:29,283 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-30 17:54:29,283 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 117 flow [2023-08-30 17:54:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:54:29,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:29,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:29,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:54:29,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:29,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1082791144, now seen corresponding path program 1 times [2023-08-30 17:54:29,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:29,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30515866] [2023-08-30 17:54:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:29,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:29,306 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 17:54:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30515866] [2023-08-30 17:54:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30515866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:29,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823874888] [2023-08-30 17:54:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:29,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:29,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:29,308 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 17:54:29,310 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 17:54:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:29,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:29,364 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 17:54:29,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:29,375 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 17:54:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823874888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:29,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448376766] [2023-08-30 17:54:29,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:29,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 269 [2023-08-30 17:54:29,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 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 17:54:29,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:29,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 269 [2023-08-30 17:54:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:29,745 INFO L130 PetriNetUnfolder]: 4372/6619 cut-off events. [2023-08-30 17:54:29,745 INFO L131 PetriNetUnfolder]: For 1134/1134 co-relation queries the response was YES. [2023-08-30 17:54:29,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13991 conditions, 6619 events. 4372/6619 cut-off events. For 1134/1134 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 38886 event pairs, 504 based on Foata normal form. 657/7240 useless extension candidates. Maximal degree in co-relation 1597. Up to 4122 conditions per place. [2023-08-30 17:54:29,753 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2023-08-30 17:54:29,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 365 flow [2023-08-30 17:54:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:54:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:54:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2023-08-30 17:54:29,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229244114002478 [2023-08-30 17:54:29,755 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2023-08-30 17:54:29,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2023-08-30 17:54:29,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:29,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2023-08-30 17:54:29,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 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 17:54:29,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 17:54:29,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 17:54:29,759 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 117 flow. Second operand 6 states and 844 transitions. [2023-08-30 17:54:29,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 365 flow [2023-08-30 17:54:29,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 361 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:54:29,761 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:54:29,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, 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 17:54:29,761 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-30 17:54:29,761 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:54:29,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 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 17:54:29,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:54:29,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 17:54:29,965 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 17:54:29,968 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:54:29,968 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:54:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:29,984 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-30 17:54:29,984 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:29,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-30 17:54:29,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:29,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:29,987 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:29,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:29,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:29,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-30 17:54:30,002 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-30 17:54:30,002 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:30,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-30 17:54:30,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-08-30 17:54:31,568 INFO L134 LiptonReduction]: Checked pairs total: 33143 [2023-08-30 17:54:31,568 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-30 17:54:31,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:54:31,570 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:31,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:31,574 INFO L130 PetriNetUnfolder]: 26/101 cut-off events. [2023-08-30 17:54:31,574 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:54:31,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:31,574 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:54:31,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:54:31,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1307292255, now seen corresponding path program 1 times [2023-08-30 17:54:31,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676534032] [2023-08-30 17:54:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:31,589 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:54:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:31,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:54:31,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:54:31,596 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:54:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:54:31,597 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:54:31,597 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:54:31,597 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:54:31,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:54:31,608 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:54:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,648 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-30 17:54:31,648 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:54:31,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-30 17:54:31,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:31,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:54:31,682 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-30 17:54:31,682 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:54:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-30 17:54:31,690 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-08-30 17:54:33,315 INFO L134 LiptonReduction]: Checked pairs total: 51259 [2023-08-30 17:54:33,316 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-30 17:54:33,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:33,317 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:33,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:33,318 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 17:54:33,318 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:33,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:33,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:54:33,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:33,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1504507769, now seen corresponding path program 1 times [2023-08-30 17:54:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641483889] [2023-08-30 17:54:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:33,347 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 17:54:33,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:33,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641483889] [2023-08-30 17:54:33,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641483889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:33,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:33,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889413165] [2023-08-30 17:54:33,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:33,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:33,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:33,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 315 [2023-08-30 17:54:33,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 17:54:33,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:33,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 315 [2023-08-30 17:54:33,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:55,109 INFO L130 PetriNetUnfolder]: 298317/406719 cut-off events. [2023-08-30 17:54:55,110 INFO L131 PetriNetUnfolder]: For 14730/14730 co-relation queries the response was YES. [2023-08-30 17:54:55,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802382 conditions, 406719 events. 298317/406719 cut-off events. For 14730/14730 co-relation queries the response was YES. Maximal size of possible extension queue 8300. Compared 3051593 event pairs, 214660 based on Foata normal form. 65452/440647 useless extension candidates. Maximal degree in co-relation 69542. Up to 387526 conditions per place. [2023-08-30 17:54:56,454 INFO L137 encePairwiseOnDemand]: 286/315 looper letters, 51 selfloop transitions, 2 changer transitions 12/79 dead transitions. [2023-08-30 17:54:56,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-30 17:54:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-30 17:54:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-30 17:54:56,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-30 17:54:56,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-30 17:54:56,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:56,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-30 17:54:56,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 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 17:54:56,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 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 17:54:56,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 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 17:54:56,459 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 546 transitions. [2023-08-30 17:54:56,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-30 17:54:56,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:56,464 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 150 flow [2023-08-30 17:54:56,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2023-08-30 17:54:56,465 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 17:54:56,465 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 150 flow [2023-08-30 17:54:56,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 17:54:56,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:56,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:56,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:54:56,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:54:56,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash -314396294, now seen corresponding path program 1 times [2023-08-30 17:54:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340564028] [2023-08-30 17:54:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:56,486 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 17:54:56,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:56,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340564028] [2023-08-30 17:54:56,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340564028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:56,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506885974] [2023-08-30 17:54:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:56,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:56,488 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 17:54:56,490 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 17:54:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:56,557 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 17:54:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:56,572 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 17:54:56,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506885974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:56,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:56,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:54:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759629057] [2023-08-30 17:54:56,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:56,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:54:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:54:56,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:54:56,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 315 [2023-08-30 17:54:56,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 151.16666666666666) internal successors, (907), 6 states have internal predecessors, (907), 0 states have call successors, (0), 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 17:54:56,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:56,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 315 [2023-08-30 17:54:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:06,168 INFO L130 PetriNetUnfolder]: 150148/201202 cut-off events. [2023-08-30 17:55:06,168 INFO L131 PetriNetUnfolder]: For 15363/15363 co-relation queries the response was YES. [2023-08-30 17:55:06,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410331 conditions, 201202 events. 150148/201202 cut-off events. For 15363/15363 co-relation queries the response was YES. Maximal size of possible extension queue 4578. Compared 1381843 event pairs, 19242 based on Foata normal form. 729/196090 useless extension candidates. Maximal degree in co-relation 46647. Up to 138268 conditions per place. [2023-08-30 17:55:06,958 INFO L137 encePairwiseOnDemand]: 311/315 looper letters, 121 selfloop transitions, 5 changer transitions 1/141 dead transitions. [2023-08-30 17:55:06,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 574 flow [2023-08-30 17:55:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:55:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:55:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1024 transitions. [2023-08-30 17:55:06,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417989417989418 [2023-08-30 17:55:06,961 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1024 transitions. [2023-08-30 17:55:06,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1024 transitions. [2023-08-30 17:55:06,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:06,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1024 transitions. [2023-08-30 17:55:06,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.66666666666666) internal successors, (1024), 6 states have internal predecessors, (1024), 0 states have call successors, (0), 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 17:55:06,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 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 17:55:06,965 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 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 17:55:06,966 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 150 flow. Second operand 6 states and 1024 transitions. [2023-08-30 17:55:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 574 flow [2023-08-30 17:55:06,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:55:06,970 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 176 flow [2023-08-30 17:55:06,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-30 17:55:06,971 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 17:55:06,971 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 176 flow [2023-08-30 17:55:06,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.16666666666666) internal successors, (907), 6 states have internal predecessors, (907), 0 states have call successors, (0), 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 17:55:06,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:06,972 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:06,976 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 17:55:07,175 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 17:55:07,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:07,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2036142589, now seen corresponding path program 1 times [2023-08-30 17:55:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144663206] [2023-08-30 17:55:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:07,272 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 17:55:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144663206] [2023-08-30 17:55:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144663206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:07,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:55:07,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033699328] [2023-08-30 17:55:07,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:07,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:07,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 315 [2023-08-30 17:55:07,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 17:55:07,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:07,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 315 [2023-08-30 17:55:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:17,246 INFO L130 PetriNetUnfolder]: 145933/193693 cut-off events. [2023-08-30 17:55:17,246 INFO L131 PetriNetUnfolder]: For 112884/112884 co-relation queries the response was YES. [2023-08-30 17:55:17,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433038 conditions, 193693 events. 145933/193693 cut-off events. For 112884/112884 co-relation queries the response was YES. Maximal size of possible extension queue 4181. Compared 1275096 event pairs, 69928 based on Foata normal form. 81/187157 useless extension candidates. Maximal degree in co-relation 334898. Up to 185869 conditions per place. [2023-08-30 17:55:18,323 INFO L137 encePairwiseOnDemand]: 309/315 looper letters, 66 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2023-08-30 17:55:18,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 414 flow [2023-08-30 17:55:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 17:55:18,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5301587301587302 [2023-08-30 17:55:18,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 17:55:18,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 17:55:18,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:18,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 17:55:18,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 17:55:18,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 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 17:55:18,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 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 17:55:18,329 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 176 flow. Second operand 3 states and 501 transitions. [2023-08-30 17:55:18,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 414 flow [2023-08-30 17:55:18,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 394 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 17:55:18,343 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 198 flow [2023-08-30 17:55:18,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-08-30 17:55:18,344 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 17:55:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 198 flow [2023-08-30 17:55:18,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 17:55:18,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:18,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:18,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:55:18,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:18,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -742251052, now seen corresponding path program 1 times [2023-08-30 17:55:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:18,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963721893] [2023-08-30 17:55:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:18,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:18,399 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 17:55:18,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:18,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963721893] [2023-08-30 17:55:18,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963721893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:55:18,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228062704] [2023-08-30 17:55:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:18,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:18,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:55:18,401 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 17:55:18,403 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 17:55:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:55:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:55:18,490 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 17:55:18,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:55:18,537 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 17:55:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228062704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:55:18,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:55:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 17:55:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617408322] [2023-08-30 17:55:18,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:55:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 17:55:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 17:55:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 17:55:18,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 315 [2023-08-30 17:55:18,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 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 17:55:18,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:18,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 315 [2023-08-30 17:55:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:21,903 INFO L130 PetriNetUnfolder]: 45720/64315 cut-off events. [2023-08-30 17:55:21,903 INFO L131 PetriNetUnfolder]: For 48183/48183 co-relation queries the response was YES. [2023-08-30 17:55:22,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142193 conditions, 64315 events. 45720/64315 cut-off events. For 48183/48183 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 432977 event pairs, 918 based on Foata normal form. 6534/70556 useless extension candidates. Maximal degree in co-relation 90446. Up to 29619 conditions per place. [2023-08-30 17:55:22,193 INFO L137 encePairwiseOnDemand]: 312/315 looper letters, 0 selfloop transitions, 0 changer transitions 145/145 dead transitions. [2023-08-30 17:55:22,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 649 flow [2023-08-30 17:55:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:55:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:55:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1165 transitions. [2023-08-30 17:55:22,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528344671201814 [2023-08-30 17:55:22,196 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1165 transitions. [2023-08-30 17:55:22,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1165 transitions. [2023-08-30 17:55:22,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:22,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1165 transitions. [2023-08-30 17:55:22,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.42857142857142) internal successors, (1165), 7 states have internal predecessors, (1165), 0 states have call successors, (0), 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 17:55:22,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 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 17:55:22,201 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 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 17:55:22,201 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 198 flow. Second operand 7 states and 1165 transitions. [2023-08-30 17:55:22,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 649 flow [2023-08-30 17:55:22,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 145 transitions, 629 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 17:55:22,209 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-30 17:55:22,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, 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 17:55:22,213 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-30 17:55:22,213 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-30 17:55:22,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 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 17:55:22,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:55:22,220 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 17:55:22,415 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 17:55:22,415 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:55:22,415 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:55:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,445 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-30 17:55:22,445 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:55:22,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-30 17:55:22,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,449 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:22,450 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,450 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-30 17:55:22,479 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-30 17:55:22,479 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:55:22,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-30 17:55:22,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-08-30 17:55:24,167 INFO L134 LiptonReduction]: Checked pairs total: 63891 [2023-08-30 17:55:24,167 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-30 17:55:24,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:55:24,168 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:24,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:55:24,174 INFO L130 PetriNetUnfolder]: 38/145 cut-off events. [2023-08-30 17:55:24,174 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:55:24,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:24,174 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:24,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:55:24,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1002577702, now seen corresponding path program 1 times [2023-08-30 17:55:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190128916] [2023-08-30 17:55:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:24,197 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:55:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:24,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:55:24,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:55:24,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:55:24,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:55:24,218 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:55:24,219 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:55:24,219 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:55:24,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:55:24,239 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:55:24,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,300 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-08-30 17:55:24,300 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:55:24,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-08-30 17:55:24,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:24,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-08-30 17:55:24,363 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-08-30 17:55:24,363 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:55:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-08-30 17:55:24,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 30520 [2023-08-30 17:55:26,176 INFO L134 LiptonReduction]: Checked pairs total: 84639 [2023-08-30 17:55:26,176 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-30 17:55:26,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:55:26,178 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;@3e47a9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:26,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:55:26,179 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 17:55:26,179 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:26,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:26,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 17:55:26,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:55:26,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1990845393, now seen corresponding path program 1 times [2023-08-30 17:55:26,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:26,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829136549] [2023-08-30 17:55:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:26,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:26,201 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 17:55:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829136549] [2023-08-30 17:55:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829136549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:55:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969899595] [2023-08-30 17:55:26,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 359 [2023-08-30 17:55:26,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 17:55:26,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:26,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 359 [2023-08-30 17:55:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand