./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.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_06-cond_racing1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --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 17:45:36,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:45:36,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:45:36,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:45:36,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:45:36,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:45:36,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:45:36,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:45:36,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:45:36,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:45:36,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:45:36,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:45:36,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:45:36,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:45:36,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:45:36,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:45:36,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:45:36,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:45:36,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:45:36,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:45:36,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:45:36,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:45:36,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:45:36,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:45:36,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:45:36,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:45:36,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:45:36,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:45:36,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:45:36,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:45:36,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:45:36,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:45:36,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:45:36,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:45:36,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:45:36,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:45:36,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:45:36,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:45:36,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:45:36,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:45:36,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:45:36,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:45:36,334 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:45:36,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:45:36,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:45:36,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:45:36,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:45:36,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:45:36,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:45:36,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:45:36,336 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:45:36,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:45:36,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:45:36,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:45:36,338 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:45:36,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:45:36,338 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:45:36,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:45:36,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:45:36,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:45:36,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:45:36,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:45:36,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:45:36,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:45:36,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:45:36,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:45:36,341 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:45:36,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:45:36,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:45:36,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:45:36,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:45:36,625 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:45:36,626 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:45:36,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-30 17:45:37,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:45:38,125 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:45:38,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-30 17:45:38,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8614b83/b2dd963781fb45c5932e06e4076e3bd5/FLAGcb3fd87b6 [2023-08-30 17:45:38,162 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb8614b83/b2dd963781fb45c5932e06e4076e3bd5 [2023-08-30 17:45:38,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:45:38,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:45:38,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:45:38,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:45:38,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:45:38,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb690e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38, skipping insertion in model container [2023-08-30 17:45:38,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:45:38,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:45:38,526 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_06-cond_racing1.i[41322,41335] [2023-08-30 17:45:38,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:45:38,555 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:45:38,614 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_06-cond_racing1.i[41322,41335] [2023-08-30 17:45:38,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:45:38,692 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:45:38,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38 WrapperNode [2023-08-30 17:45:38,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:45:38,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:45:38,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:45:38,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:45:38,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,763 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-08-30 17:45:38,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:45:38,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:45:38,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:45:38,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:45:38,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:45:38,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:45:38,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:45:38,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:45:38,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (1/1) ... [2023-08-30 17:45:38,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:45:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:38,854 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 17:45:38,884 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 17:45:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:45:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:45:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:45:38,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:45:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:45:38,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:45:38,902 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 17:45:39,094 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:45:39,096 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:45:39,335 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:45:39,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:45:39,347 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:45:39,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:45:39 BoogieIcfgContainer [2023-08-30 17:45:39,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:45:39,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:45:39,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:45:39,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:45:39,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:45:38" (1/3) ... [2023-08-30 17:45:39,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f39fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:45:39, skipping insertion in model container [2023-08-30 17:45:39,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:45:38" (2/3) ... [2023-08-30 17:45:39,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f39fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:45:39, skipping insertion in model container [2023-08-30 17:45:39,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:45:39" (3/3) ... [2023-08-30 17:45:39,359 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-08-30 17:45:39,368 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:45:39,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:45:39,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:45:39,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:45:39,465 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:45:39,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 119 transitions, 246 flow [2023-08-30 17:45:39,589 INFO L130 PetriNetUnfolder]: 23/161 cut-off events. [2023-08-30 17:45:39,590 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:45:39,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 23/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-30 17:45:39,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 119 transitions, 246 flow [2023-08-30 17:45:39,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:39,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:39,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:39,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:39,672 INFO L130 PetriNetUnfolder]: 22/156 cut-off events. [2023-08-30 17:45:39,672 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 22/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-30 17:45:39,676 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 17:45:43,003 INFO L134 LiptonReduction]: Checked pairs total: 4411 [2023-08-30 17:45:43,004 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-30 17:45:43,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:45:43,021 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:43,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:43,026 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:45:43,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:43,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:43,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:45:43,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:43,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash 14157000, now seen corresponding path program 1 times [2023-08-30 17:45:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:43,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502689537] [2023-08-30 17:45:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:43,238 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 17:45:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502689537] [2023-08-30 17:45:43,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502689537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:43,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:43,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:45:43,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342404714] [2023-08-30 17:45:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:43,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:43,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:43,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 217 [2023-08-30 17:45:43,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 17:45:43,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:43,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 217 [2023-08-30 17:45:43,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:43,377 INFO L130 PetriNetUnfolder]: 105/234 cut-off events. [2023-08-30 17:45:43,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:43,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 234 events. 105/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1040 event pairs, 0 based on Foata normal form. 22/211 useless extension candidates. Maximal degree in co-relation 443. Up to 214 conditions per place. [2023-08-30 17:45:43,382 INFO L137 encePairwiseOnDemand]: 204/217 looper letters, 21 selfloop transitions, 2 changer transitions 10/34 dead transitions. [2023-08-30 17:45:43,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 137 flow [2023-08-30 17:45:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-30 17:45:43,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407066052227343 [2023-08-30 17:45:43,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-30 17:45:43,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-30 17:45:43,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:43,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-30 17:45:43,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 17:45:43,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:43,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:45:43,430 INFO L175 Difference]: Start difference. First operand has 27 places, 34 transitions, 73 flow. Second operand 3 states and 352 transitions. [2023-08-30 17:45:43,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 137 flow [2023-08-30 17:45:43,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:45:43,433 INFO L231 Difference]: Finished difference. Result has 30 places, 16 transitions, 43 flow [2023-08-30 17:45:43,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=30, PETRI_TRANSITIONS=16} [2023-08-30 17:45:43,438 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-30 17:45:43,438 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 16 transitions, 43 flow [2023-08-30 17:45:43,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 17:45:43,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:43,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:45:43,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:43,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash -54664322, now seen corresponding path program 1 times [2023-08-30 17:45:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62844304] [2023-08-30 17:45:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:43,551 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 17:45:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62844304] [2023-08-30 17:45:43,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62844304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:45:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401419174] [2023-08-30 17:45:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:43,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:45:43,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:43,556 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 17:45:43,563 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 17:45:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:45:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:45:43,679 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 17:45:43,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:45:43,712 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 17:45:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401419174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:45:43,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:45:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:45:43,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945256029] [2023-08-30 17:45:43,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:45:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:45:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:45:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:45:43,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 217 [2023-08-30 17:45:43,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 16 transitions, 43 flow. Second operand has 7 states, 7 states have (on average 102.28571428571429) internal successors, (716), 7 states have internal predecessors, (716), 0 states have call successors, (0), 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 17:45:43,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:43,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 217 [2023-08-30 17:45:43,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:43,808 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-30 17:45:43,808 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:45:43,809 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 84 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 17:45:43,809 INFO L137 encePairwiseOnDemand]: 214/217 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 17:45:43,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-08-30 17:45:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:45:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:45:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 422 transitions. [2023-08-30 17:45:43,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861751152073733 [2023-08-30 17:45:43,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 422 transitions. [2023-08-30 17:45:43,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 422 transitions. [2023-08-30 17:45:43,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:43,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 422 transitions. [2023-08-30 17:45:43,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 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 17:45:43,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 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 17:45:43,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 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 17:45:43,820 INFO L175 Difference]: Start difference. First operand has 30 places, 16 transitions, 43 flow. Second operand 4 states and 422 transitions. [2023-08-30 17:45:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-08-30 17:45:43,820 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 17:45:43,821 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-30 17:45:43,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, 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 17:45:43,821 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -8 predicate places. [2023-08-30 17:45:43,822 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-30 17:45:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.28571428571429) internal successors, (716), 7 states have internal predecessors, (716), 0 states have call successors, (0), 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 17:45:43,827 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:45:43,836 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 17:45:44,032 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 17:45:44,032 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:45:44,034 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:45:44,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 119 transitions, 246 flow [2023-08-30 17:45:44,056 INFO L130 PetriNetUnfolder]: 23/161 cut-off events. [2023-08-30 17:45:44,056 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:45:44,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 23/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-30 17:45:44,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 119 transitions, 246 flow [2023-08-30 17:45:44,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:44,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:44,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:44,059 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 114 transitions, 233 flow [2023-08-30 17:45:44,075 INFO L130 PetriNetUnfolder]: 22/156 cut-off events. [2023-08-30 17:45:44,075 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:44,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 22/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-30 17:45:44,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-30 17:45:46,845 INFO L134 LiptonReduction]: Checked pairs total: 4389 [2023-08-30 17:45:46,845 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-30 17:45:46,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:45:46,848 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:46,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:46,851 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-08-30 17:45:46,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:46,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:46,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:45:46,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:45:46,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash -707734956, now seen corresponding path program 1 times [2023-08-30 17:45:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982806574] [2023-08-30 17:45:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:46,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:45:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:46,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:45:46,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:45:46,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:45:46,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:45:46,945 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:45:46,945 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:45:46,946 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:45:46,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:45:46,969 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:45:46,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,009 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-30 17:45:47,011 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:47,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-30 17:45:47,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:47,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:47,040 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-30 17:45:47,040 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:47,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-30 17:45:47,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 17:45:49,815 INFO L134 LiptonReduction]: Checked pairs total: 17558 [2023-08-30 17:45:49,815 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 17:45:49,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:45:49,818 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:49,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:49,821 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:45:49,821 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:49,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:49,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:45:49,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:49,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash 26131543, now seen corresponding path program 1 times [2023-08-30 17:45:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814044496] [2023-08-30 17:45:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:49,891 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 17:45:49,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:49,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814044496] [2023-08-30 17:45:49,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814044496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:49,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:49,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:45:49,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391482038] [2023-08-30 17:45:49,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 261 [2023-08-30 17:45:49,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 17:45:49,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:49,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 261 [2023-08-30 17:45:49,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:50,163 INFO L130 PetriNetUnfolder]: 1562/2747 cut-off events. [2023-08-30 17:45:50,164 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 17:45:50,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 2747 events. 1562/2747 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16684 event pairs, 704 based on Foata normal form. 356/2700 useless extension candidates. Maximal degree in co-relation 714. Up to 2513 conditions per place. [2023-08-30 17:45:50,172 INFO L137 encePairwiseOnDemand]: 242/261 looper letters, 28 selfloop transitions, 2 changer transitions 13/52 dead transitions. [2023-08-30 17:45:50,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 204 flow [2023-08-30 17:45:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-30 17:45:50,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5530012771392082 [2023-08-30 17:45:50,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-30 17:45:50,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-30 17:45:50,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:50,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-30 17:45:50,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 17:45:50,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 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 17:45:50,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 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 17:45:50,180 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 433 transitions. [2023-08-30 17:45:50,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 204 flow [2023-08-30 17:45:50,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:45:50,182 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 82 flow [2023-08-30 17:45:50,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-08-30 17:45:50,183 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-30 17:45:50,183 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 82 flow [2023-08-30 17:45:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 17:45:50,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:50,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:45:50,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:50,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1709336137, now seen corresponding path program 1 times [2023-08-30 17:45:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:50,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585189252] [2023-08-30 17:45:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:45:50,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585189252] [2023-08-30 17:45:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585189252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:45:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967610422] [2023-08-30 17:45:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:45:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:50,230 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 17:45:50,261 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 17:45:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:45:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:45:50,318 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 17:45:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:45:50,336 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 17:45:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967610422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:45:50,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:45:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:45:50,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027679441] [2023-08-30 17:45:50,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:45:50,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:45:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:45:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:45:50,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 261 [2023-08-30 17:45:50,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 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 17:45:50,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:50,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 261 [2023-08-30 17:45:50,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:50,452 INFO L130 PetriNetUnfolder]: 286/546 cut-off events. [2023-08-30 17:45:50,452 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2023-08-30 17:45:50,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 546 events. 286/546 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2520 event pairs, 89 based on Foata normal form. 70/614 useless extension candidates. Maximal degree in co-relation 764. Up to 346 conditions per place. [2023-08-30 17:45:50,454 INFO L137 encePairwiseOnDemand]: 258/261 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-30 17:45:50,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 202 flow [2023-08-30 17:45:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:45:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:45:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-30 17:45:50,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011494252873563 [2023-08-30 17:45:50,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-30 17:45:50,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-30 17:45:50,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:50,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-30 17:45:50,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 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 17:45:50,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 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 17:45:50,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 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 17:45:50,484 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 82 flow. Second operand 5 states and 654 transitions. [2023-08-30 17:45:50,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 202 flow [2023-08-30 17:45:50,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:45:50,485 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:45:50,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, 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 17:45:50,486 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2023-08-30 17:45:50,486 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:45:50,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 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 17:45:50,487 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:45:50,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:45:50,693 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 17:45:50,693 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:45:50,693 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:45:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,711 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-30 17:45:50,712 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:50,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-30 17:45:50,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:50,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-30 17:45:50,732 INFO L130 PetriNetUnfolder]: 40/257 cut-off events. [2023-08-30 17:45:50,733 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:45:50,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-30 17:45:50,739 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-30 17:45:53,422 INFO L134 LiptonReduction]: Checked pairs total: 17638 [2023-08-30 17:45:53,422 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 17:45:53,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:45:53,425 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:53,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:53,439 INFO L130 PetriNetUnfolder]: 15/64 cut-off events. [2023-08-30 17:45:53,444 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:45:53,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:53,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:45:53,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:45:53,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:53,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2081541266, now seen corresponding path program 1 times [2023-08-30 17:45:53,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:53,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414324693] [2023-08-30 17:45:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:53,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:53,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:45:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:45:53,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:45:53,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:45:53,500 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:45:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:45:53,501 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:45:53,502 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:45:53,502 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:45:53,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:45:53,523 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:45:53,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,552 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-30 17:45:53,553 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:45:53,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-30 17:45:53,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:53,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:53,589 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-30 17:45:53,589 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:45:53,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-30 17:45:53,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-30 17:45:56,227 INFO L134 LiptonReduction]: Checked pairs total: 34551 [2023-08-30 17:45:56,228 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 17:45:56,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:45:56,230 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:45:56,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:45:56,232 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:45:56,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:45:56,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:56,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:45:56,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:56,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 39922588, now seen corresponding path program 1 times [2023-08-30 17:45:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345051848] [2023-08-30 17:45:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:56,271 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 17:45:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345051848] [2023-08-30 17:45:56,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345051848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:56,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:56,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:45:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253915977] [2023-08-30 17:45:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:56,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:56,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:56,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 306 [2023-08-30 17:45:56,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 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 17:45:56,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:56,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 306 [2023-08-30 17:45:56,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:58,486 INFO L130 PetriNetUnfolder]: 17546/27192 cut-off events. [2023-08-30 17:45:58,487 INFO L131 PetriNetUnfolder]: For 803/803 co-relation queries the response was YES. [2023-08-30 17:45:58,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52536 conditions, 27192 events. 17546/27192 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 200995 event pairs, 11031 based on Foata normal form. 6582/30616 useless extension candidates. Maximal degree in co-relation 5549. Up to 24769 conditions per place. [2023-08-30 17:45:58,598 INFO L137 encePairwiseOnDemand]: 281/306 looper letters, 35 selfloop transitions, 2 changer transitions 14/65 dead transitions. [2023-08-30 17:45:58,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 258 flow [2023-08-30 17:45:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 17:45:58,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-08-30 17:45:58,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 17:45:58,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 17:45:58,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:58,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 17:45:58,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 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 17:45:58,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 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 17:45:58,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 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 17:45:58,606 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 513 transitions. [2023-08-30 17:45:58,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 258 flow [2023-08-30 17:45:58,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:45:58,610 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 113 flow [2023-08-30 17:45:58,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2023-08-30 17:45:58,611 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-30 17:45:58,611 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 113 flow [2023-08-30 17:45:58,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 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 17:45:58,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:58,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:58,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:45:58,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:45:58,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -879668308, now seen corresponding path program 1 times [2023-08-30 17:45:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:58,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976915656] [2023-08-30 17:45:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:58,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:58,678 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 17:45:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976915656] [2023-08-30 17:45:58,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976915656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:45:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795915900] [2023-08-30 17:45:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:45:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:45:58,681 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 17:45:58,711 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 17:45:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:45:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:45:58,770 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 17:45:58,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:45:58,786 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 17:45:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795915900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:45:58,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:45:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:45:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502319485] [2023-08-30 17:45:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:45:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:45:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:45:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:45:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 306 [2023-08-30 17:45:58,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 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 17:45:58,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:58,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 306 [2023-08-30 17:45:58,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:59,370 INFO L130 PetriNetUnfolder]: 3352/5486 cut-off events. [2023-08-30 17:45:59,370 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2023-08-30 17:45:59,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11174 conditions, 5486 events. 3352/5486 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 35273 event pairs, 355 based on Foata normal form. 511/5805 useless extension candidates. Maximal degree in co-relation 7814. Up to 3178 conditions per place. [2023-08-30 17:45:59,380 INFO L137 encePairwiseOnDemand]: 303/306 looper letters, 0 selfloop transitions, 0 changer transitions 85/85 dead transitions. [2023-08-30 17:45:59,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 337 flow [2023-08-30 17:45:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:45:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:45:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 938 transitions. [2023-08-30 17:45:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108932461873639 [2023-08-30 17:45:59,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 938 transitions. [2023-08-30 17:45:59,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 938 transitions. [2023-08-30 17:45:59,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:59,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 938 transitions. [2023-08-30 17:45:59,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 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 17:45:59,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 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 17:45:59,389 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 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 17:45:59,390 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 113 flow. Second operand 6 states and 938 transitions. [2023-08-30 17:45:59,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 337 flow [2023-08-30 17:45:59,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 333 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:45:59,393 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:45:59,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, 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 17:45:59,395 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2023-08-30 17:45:59,395 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:45:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 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 17:45:59,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:45:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 17:45:59,608 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 17:45:59,608 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:45:59,609 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:45:59,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,639 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-30 17:45:59,640 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:45:59,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-30 17:45:59,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:45:59,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 179 transitions, 388 flow [2023-08-30 17:45:59,673 INFO L130 PetriNetUnfolder]: 62/384 cut-off events. [2023-08-30 17:45:59,673 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:45:59,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 384 events. 62/384 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2023-08-30 17:45:59,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-30 17:46:02,193 INFO L134 LiptonReduction]: Checked pairs total: 34429 [2023-08-30 17:46:02,193 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 17:46:02,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:46:02,195 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:02,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:02,244 INFO L130 PetriNetUnfolder]: 26/103 cut-off events. [2023-08-30 17:46:02,244 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:46:02,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:02,245 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:46:02,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:46:02,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2059636334, now seen corresponding path program 1 times [2023-08-30 17:46:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308350888] [2023-08-30 17:46:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:02,261 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:46:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:46:02,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:46:02,273 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:46:02,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:46:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:46:02,274 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:46:02,275 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:46:02,275 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:46:02,275 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:46:02,290 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:46:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,344 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-30 17:46:02,345 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:02,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-30 17:46:02,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:02,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:02,406 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-30 17:46:02,407 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-30 17:46:02,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-30 17:46:05,147 INFO L134 LiptonReduction]: Checked pairs total: 58382 [2023-08-30 17:46:05,147 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-30 17:46:05,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:46:05,149 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:46:05,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:46:05,151 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 17:46:05,151 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:46:05,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:05,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:46:05,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:05,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 55652494, now seen corresponding path program 1 times [2023-08-30 17:46:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175422978] [2023-08-30 17:46:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:05,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:05,176 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 17:46:05,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:05,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175422978] [2023-08-30 17:46:05,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175422978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:05,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:05,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:46:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348743736] [2023-08-30 17:46:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:05,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 354 [2023-08-30 17:46:05,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 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 17:46:05,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:05,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 354 [2023-08-30 17:46:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:30,902 INFO L130 PetriNetUnfolder]: 298488/412851 cut-off events. [2023-08-30 17:46:30,902 INFO L131 PetriNetUnfolder]: For 14302/14302 co-relation queries the response was YES. [2023-08-30 17:46:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808722 conditions, 412851 events. 298488/412851 cut-off events. For 14302/14302 co-relation queries the response was YES. Maximal size of possible extension queue 9094. Compared 3228995 event pairs, 281380 based on Foata normal form. 66925/446350 useless extension candidates. Maximal degree in co-relation 70570. Up to 387778 conditions per place. [2023-08-30 17:46:32,473 INFO L137 encePairwiseOnDemand]: 324/354 looper letters, 49 selfloop transitions, 2 changer transitions 14/79 dead transitions. [2023-08-30 17:46:32,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-30 17:46:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 17:46:32,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630885122410546 [2023-08-30 17:46:32,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 17:46:32,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 17:46:32,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:32,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 17:46:32,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 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 17:46:32,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 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 17:46:32,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 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 17:46:32,481 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 598 transitions. [2023-08-30 17:46:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-30 17:46:32,488 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 17:46:32,489 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 146 flow [2023-08-30 17:46:32,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, 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=146, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2023-08-30 17:46:32,490 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-30 17:46:32,490 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 146 flow [2023-08-30 17:46:32,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 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 17:46:32,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:32,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:32,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:46:32,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:32,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1590974796, now seen corresponding path program 1 times [2023-08-30 17:46:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590918514] [2023-08-30 17:46:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:32,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:32,538 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 17:46:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590918514] [2023-08-30 17:46:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590918514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:46:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494414851] [2023-08-30 17:46:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:32,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:32,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:46:32,540 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 17:46:32,543 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 17:46:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:46:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:46:32,629 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 17:46:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:46:32,648 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 17:46:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494414851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:46:32,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:46:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:46:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483753487] [2023-08-30 17:46:32,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:46:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:46:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:46:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:46:32,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 354 [2023-08-30 17:46:32,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 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 17:46:32,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:32,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 354 [2023-08-30 17:46:32,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:41,515 INFO L130 PetriNetUnfolder]: 123712/165319 cut-off events. [2023-08-30 17:46:41,515 INFO L131 PetriNetUnfolder]: For 11215/11215 co-relation queries the response was YES. [2023-08-30 17:46:41,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342252 conditions, 165319 events. 123712/165319 cut-off events. For 11215/11215 co-relation queries the response was YES. Maximal size of possible extension queue 4072. Compared 1133685 event pairs, 8332 based on Foata normal form. 738/166055 useless extension candidates. Maximal degree in co-relation 303241. Up to 105949 conditions per place. [2023-08-30 17:46:42,618 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 120 selfloop transitions, 5 changer transitions 1/140 dead transitions. [2023-08-30 17:46:42,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 140 transitions, 570 flow [2023-08-30 17:46:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:46:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:46:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1125 transitions. [2023-08-30 17:46:42,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296610169491526 [2023-08-30 17:46:42,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1125 transitions. [2023-08-30 17:46:42,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1125 transitions. [2023-08-30 17:46:42,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:42,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1125 transitions. [2023-08-30 17:46:42,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.5) internal successors, (1125), 6 states have internal predecessors, (1125), 0 states have call successors, (0), 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 17:46:42,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 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 17:46:42,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 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 17:46:42,631 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 146 flow. Second operand 6 states and 1125 transitions. [2023-08-30 17:46:42,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 140 transitions, 570 flow [2023-08-30 17:46:42,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 140 transitions, 562 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:46:42,637 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-30 17:46:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-30 17:46:42,639 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-30 17:46:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-30 17:46:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 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 17:46:42,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:42,640 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:42,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:46:42,844 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 17:46:42,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:42,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash 922430688, now seen corresponding path program 1 times [2023-08-30 17:46:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639930776] [2023-08-30 17:46:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:42,959 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 17:46:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639930776] [2023-08-30 17:46:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639930776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:46:42,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:46:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:46:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240493027] [2023-08-30 17:46:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:46:42,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:46:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:46:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:46:42,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 354 [2023-08-30 17:46:42,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 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 17:46:42,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:42,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 354 [2023-08-30 17:46:42,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:51,894 INFO L130 PetriNetUnfolder]: 116044/156163 cut-off events. [2023-08-30 17:46:51,894 INFO L131 PetriNetUnfolder]: For 112884/112884 co-relation queries the response was YES. [2023-08-30 17:46:52,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359058 conditions, 156163 events. 116044/156163 cut-off events. For 112884/112884 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 1054596 event pairs, 59668 based on Foata normal form. 81/156182 useless extension candidates. Maximal degree in co-relation 277675. Up to 149797 conditions per place. [2023-08-30 17:46:52,775 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 62 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-30 17:46:52,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 398 flow [2023-08-30 17:46:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:46:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:46:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-30 17:46:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160075329566854 [2023-08-30 17:46:52,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-30 17:46:52,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-30 17:46:52,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:52,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-30 17:46:52,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 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 17:46:52,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 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 17:46:52,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 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 17:46:52,781 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 3 states and 548 transitions. [2023-08-30 17:46:52,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 398 flow [2023-08-30 17:46:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 378 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 17:46:52,812 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 194 flow [2023-08-30 17:46:52,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-30 17:46:52,813 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-30 17:46:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 194 flow [2023-08-30 17:46:52,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 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 17:46:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 17:46:52,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:46:52,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1821024008, now seen corresponding path program 1 times [2023-08-30 17:46:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688286] [2023-08-30 17:46:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:52,909 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 17:46:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:52,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688286] [2023-08-30 17:46:52,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:46:52,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50830707] [2023-08-30 17:46:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:52,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:52,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:46:52,913 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 17:46:52,917 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 17:46:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:46:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:46:53,037 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 17:46:53,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:46:53,097 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 17:46:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50830707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:46:53,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:46:53,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:46:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187313873] [2023-08-30 17:46:53,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:46:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:46:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:46:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:46:53,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 354 [2023-08-30 17:46:53,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 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 17:46:53,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:53,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 354 [2023-08-30 17:46:53,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:46:56,588 INFO L130 PetriNetUnfolder]: 41092/57838 cut-off events. [2023-08-30 17:46:56,589 INFO L131 PetriNetUnfolder]: For 43272/43278 co-relation queries the response was YES. [2023-08-30 17:46:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129483 conditions, 57838 events. 41092/57838 cut-off events. For 43272/43278 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 390369 event pairs, 552 based on Foata normal form. 5832/63655 useless extension candidates. Maximal degree in co-relation 84026. Up to 26487 conditions per place. [2023-08-30 17:46:56,975 INFO L137 encePairwiseOnDemand]: 351/354 looper letters, 0 selfloop transitions, 0 changer transitions 149/149 dead transitions. [2023-08-30 17:46:56,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 149 transitions, 682 flow [2023-08-30 17:46:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:46:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:46:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1285 transitions. [2023-08-30 17:46:56,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185633575464084 [2023-08-30 17:46:56,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1285 transitions. [2023-08-30 17:46:56,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1285 transitions. [2023-08-30 17:46:56,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:46:56,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1285 transitions. [2023-08-30 17:46:56,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 183.57142857142858) internal successors, (1285), 7 states have internal predecessors, (1285), 0 states have call successors, (0), 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 17:46:56,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 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 17:46:56,985 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 354.0) internal successors, (2832), 8 states have internal predecessors, (2832), 0 states have call successors, (0), 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 17:46:56,985 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 194 flow. Second operand 7 states and 1285 transitions. [2023-08-30 17:46:56,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 149 transitions, 682 flow [2023-08-30 17:46:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 149 transitions, 659 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 17:46:56,996 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-30 17:46:56,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, 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 17:46:56,997 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-30 17:46:56,997 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-30 17:46:56,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 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 17:46:56,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:46:57,007 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 17:46:57,203 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 17:46:57,203 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:46:57,204 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:46:57,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,239 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-30 17:46:57,240 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-30 17:46:57,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,246 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:46:57,246 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 209 transitions, 462 flow [2023-08-30 17:46:57,284 INFO L130 PetriNetUnfolder]: 96/575 cut-off events. [2023-08-30 17:46:57,285 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:46:57,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 575 events. 96/575 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2103 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 404. Up to 32 conditions per place. [2023-08-30 17:46:57,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-30 17:47:00,159 INFO L134 LiptonReduction]: Checked pairs total: 58636 [2023-08-30 17:47:00,160 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-30 17:47:00,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:47:00,163 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:47:00,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:47:00,171 INFO L130 PetriNetUnfolder]: 38/148 cut-off events. [2023-08-30 17:47:00,171 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:47:00,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:00,171 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:47:00,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:47:00,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1270774368, now seen corresponding path program 1 times [2023-08-30 17:47:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:00,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907492794] [2023-08-30 17:47:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:47:00,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:47:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:47:00,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:47:00,199 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:47:00,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:47:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:47:00,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:47:00,200 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:47:00,200 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:47:00,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:47:00,220 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:47:00,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,318 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-08-30 17:47:00,319 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:47:00,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-08-30 17:47:00,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:47:00,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 239 transitions, 538 flow [2023-08-30 17:47:00,430 INFO L130 PetriNetUnfolder]: 158/898 cut-off events. [2023-08-30 17:47:00,431 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:47:00,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 898 events. 158/898 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3848 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 620. Up to 80 conditions per place. [2023-08-30 17:47:00,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-08-30 17:47:03,369 INFO L134 LiptonReduction]: Checked pairs total: 89819 [2023-08-30 17:47:03,369 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 17:47:03,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:47:03,370 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;@75948d0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:47:03,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:47:03,372 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-30 17:47:03,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:47:03,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:03,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:47:03,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:47:03,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 73138956, now seen corresponding path program 1 times [2023-08-30 17:47:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:03,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953411312] [2023-08-30 17:47:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:03,398 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 17:47:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:47:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953411312] [2023-08-30 17:47:03,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953411312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:47:03,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:47:03,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:47:03,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667710701] [2023-08-30 17:47:03,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:47:03,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:47:03,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:47:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:47:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:47:03,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 396 [2023-08-30 17:47:03,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 17:47:03,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:47:03,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 396 [2023-08-30 17:47:03,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand