./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_76-tricky_address3_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 06:57:29,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:57:29,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:57:29,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:57:29,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:57:29,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:57:29,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:57:29,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:57:29,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:57:29,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:57:29,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:57:29,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:57:29,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:57:29,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:57:29,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:57:29,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:57:29,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:57:29,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:57:29,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:57:29,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:57:29,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:57:29,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:57:29,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:57:29,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:57:29,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:57:29,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:57:29,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:57:29,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:57:29,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:57:29,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:57:29,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:57:29,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:57:29,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:57:29,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:57:29,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:57:29,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:57:29,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:57:29,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:57:29,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:57:29,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:57:29,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:57:29,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:57:29,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:57:29,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:57:29,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:57:29,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:57:30,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:57:30,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:57:30,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:57:30,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:57:30,002 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:57:30,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:57:30,003 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:57:30,003 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:57:30,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:57:30,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:57:30,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:57:30,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:57:30,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:57:30,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:57:30,004 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:57:30,004 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:57:30,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:57:30,005 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:57:30,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:57:30,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:57:30,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:57:30,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:57:30,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:57:30,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:57:30,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:57:30,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:57:30,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:57:30,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:57:30,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:57:30,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:57:30,008 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:57:30,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:57:30,008 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:57:30,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:57:30,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:57:30,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:57:30,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:57:30,314 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:57:30,314 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:57:30,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 06:57:31,579 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:57:31,846 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:57:31,846 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 06:57:31,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95ba867c5/b6482e3562db48a7a02b1542b1587039/FLAG827fd6e86 [2023-09-01 06:57:31,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95ba867c5/b6482e3562db48a7a02b1542b1587039 [2023-09-01 06:57:31,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:57:31,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:57:31,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:57:31,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:57:31,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:57:31,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:57:31" (1/1) ... [2023-09-01 06:57:31,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ada7b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:31, skipping insertion in model container [2023-09-01 06:57:31,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:57:31" (1/1) ... [2023-09-01 06:57:31,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:57:31,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:57:32,309 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_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 06:57:32,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:57:32,374 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:57:32,423 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_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 06:57:32,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:57:32,512 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:57:32,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32 WrapperNode [2023-09-01 06:57:32,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:57:32,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:57:32,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:57:32,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:57:32,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,595 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 209 [2023-09-01 06:57:32,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:57:32,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:57:32,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:57:32,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:57:32,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:57:32,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:57:32,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:57:32,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:57:32,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (1/1) ... [2023-09-01 06:57:32,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:57:32,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:32,690 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) [2023-09-01 06:57:32,721 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 [2023-09-01 06:57:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:57:32,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:57:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:57:32,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:57:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:57:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:57:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:57:32,739 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:57:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:57:32,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:57:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:57:32,741 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 06:57:32,958 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:57:32,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:57:33,313 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:57:33,323 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:57:33,323 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 06:57:33,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:57:33 BoogieIcfgContainer [2023-09-01 06:57:33,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:57:33,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:57:33,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:57:33,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:57:33,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:57:31" (1/3) ... [2023-09-01 06:57:33,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f21d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:57:33, skipping insertion in model container [2023-09-01 06:57:33,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:57:32" (2/3) ... [2023-09-01 06:57:33,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f21d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:57:33, skipping insertion in model container [2023-09-01 06:57:33,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:57:33" (3/3) ... [2023-09-01 06:57:33,335 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-09-01 06:57:33,343 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:57:33,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:57:33,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 06:57:33,353 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:57:33,416 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:57:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 454 flow [2023-09-01 06:57:33,525 INFO L130 PetriNetUnfolder]: 45/300 cut-off events. [2023-09-01 06:57:33,525 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 06:57:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 300 events. 45/300 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 961 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-09-01 06:57:33,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 223 transitions, 454 flow [2023-09-01 06:57:33,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 212 transitions, 429 flow [2023-09-01 06:57:33,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:57:33,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 212 transitions, 429 flow [2023-09-01 06:57:33,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 212 transitions, 429 flow [2023-09-01 06:57:33,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 212 transitions, 429 flow [2023-09-01 06:57:33,674 INFO L130 PetriNetUnfolder]: 44/289 cut-off events. [2023-09-01 06:57:33,674 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:57:33,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 289 events. 44/289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 919 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-09-01 06:57:33,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 14268 [2023-09-01 06:57:37,494 INFO L134 LiptonReduction]: Checked pairs total: 24341 [2023-09-01 06:57:37,494 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-09-01 06:57:37,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:37,534 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;@4c0ec77e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:37,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:37,542 INFO L130 PetriNetUnfolder]: 11/46 cut-off events. [2023-09-01 06:57:37,543 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:57:37,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:37,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 06:57:37,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:37,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1187167665, now seen corresponding path program 1 times [2023-09-01 06:57:37,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441391417] [2023-09-01 06:57:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:37,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:37,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441391417] [2023-09-01 06:57:37,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441391417] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:57:37,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:57:37,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:57:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822390632] [2023-09-01 06:57:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:57:37,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:57:37,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:57:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:57:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 416 [2023-09-01 06:57:37,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 77 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:37,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:37,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 416 [2023-09-01 06:57:37,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:38,105 INFO L130 PetriNetUnfolder]: 498/1040 cut-off events. [2023-09-01 06:57:38,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:57:38,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 1040 events. 498/1040 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5634 event pairs, 456 based on Foata normal form. 113/838 useless extension candidates. Maximal degree in co-relation 1965. Up to 981 conditions per place. [2023-09-01 06:57:38,110 INFO L137 encePairwiseOnDemand]: 389/416 looper letters, 27 selfloop transitions, 2 changer transitions 22/54 dead transitions. [2023-09-01 06:57:38,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 209 flow [2023-09-01 06:57:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:57:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:57:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-09-01 06:57:38,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-09-01 06:57:38,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-09-01 06:57:38,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-09-01 06:57:38,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:38,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-09-01 06:57:38,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,144 INFO L175 Difference]: Start difference. First operand has 55 places, 77 transitions, 159 flow. Second operand 3 states and 637 transitions. [2023-09-01 06:57:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 209 flow [2023-09-01 06:57:38,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:57:38,150 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 79 flow [2023-09-01 06:57:38,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2023-09-01 06:57:38,155 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-09-01 06:57:38,155 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 79 flow [2023-09-01 06:57:38,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:38,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:38,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:57:38,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:38,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1654270165, now seen corresponding path program 1 times [2023-09-01 06:57:38,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:38,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043817716] [2023-09-01 06:57:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:38,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043817716] [2023-09-01 06:57:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043817716] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:38,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590173024] [2023-09-01 06:57:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:38,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:38,230 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) [2023-09-01 06:57:38,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 06:57:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:57:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:38,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:38,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590173024] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:38,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:38,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:57:38,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464193881] [2023-09-01 06:57:38,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:38,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:57:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:57:38,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:57:38,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 416 [2023-09-01 06:57:38,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:38,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 416 [2023-09-01 06:57:38,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:38,560 INFO L130 PetriNetUnfolder]: 102/237 cut-off events. [2023-09-01 06:57:38,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:57:38,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 237 events. 102/237 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 851 event pairs, 95 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 465. Up to 221 conditions per place. [2023-09-01 06:57:38,562 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-09-01 06:57:38,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 155 flow [2023-09-01 06:57:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:57:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:57:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1157 transitions. [2023-09-01 06:57:38,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-09-01 06:57:38,567 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1157 transitions. [2023-09-01 06:57:38,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1157 transitions. [2023-09-01 06:57:38,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:38,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1157 transitions. [2023-09-01 06:57:38,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,585 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,586 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 79 flow. Second operand 6 states and 1157 transitions. [2023-09-01 06:57:38,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 155 flow [2023-09-01 06:57:38,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:38,588 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2023-09-01 06:57:38,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 06:57:38,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 06:57:38,590 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2023-09-01 06:57:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:38,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:38,593 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 06:57:38,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 06:57:38,798 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 [2023-09-01 06:57:38,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:38,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash -920020657, now seen corresponding path program 2 times [2023-09-01 06:57:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184331658] [2023-09-01 06:57:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:38,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184331658] [2023-09-01 06:57:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184331658] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:38,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349159819] [2023-09-01 06:57:38,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:57:38,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:38,959 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) [2023-09-01 06:57:38,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 06:57:39,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:57:39,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:57:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:57:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:39,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:57:39,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349159819] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:39,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:39,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:57:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485347626] [2023-09-01 06:57:39,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:57:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:57:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:57:39,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 416 [2023-09-01 06:57:39,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:39,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:39,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 416 [2023-09-01 06:57:39,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:39,327 INFO L130 PetriNetUnfolder]: 102/243 cut-off events. [2023-09-01 06:57:39,327 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 06:57:39,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 243 events. 102/243 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 851 event pairs, 95 based on Foata normal form. 6/158 useless extension candidates. Maximal degree in co-relation 456. Up to 221 conditions per place. [2023-09-01 06:57:39,329 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2023-09-01 06:57:39,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 223 flow [2023-09-01 06:57:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:57:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:57:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2288 transitions. [2023-09-01 06:57:39,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 06:57:39,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2288 transitions. [2023-09-01 06:57:39,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2288 transitions. [2023-09-01 06:57:39,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:39,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2288 transitions. [2023-09-01 06:57:39,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:39,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:39,353 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:39,354 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 12 states and 2288 transitions. [2023-09-01 06:57:39,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 223 flow [2023-09-01 06:57:39,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 209 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:39,358 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 181 flow [2023-09-01 06:57:39,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-09-01 06:57:39,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-09-01 06:57:39,360 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 181 flow [2023-09-01 06:57:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:39,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:39,362 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 06:57:39,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 06:57:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 06:57:39,569 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:39,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1315861553, now seen corresponding path program 3 times [2023-09-01 06:57:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981462511] [2023-09-01 06:57:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:39,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:57:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:39,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:57:39,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:57:39,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:57:39,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:57:39,680 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:57:39,682 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:57:39,683 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:57:39,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:57:39,732 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:57:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2023-09-01 06:57:39,822 INFO L130 PetriNetUnfolder]: 75/497 cut-off events. [2023-09-01 06:57:39,822 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:57:39,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 497 events. 75/497 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2021 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-09-01 06:57:39,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 307 transitions, 632 flow [2023-09-01 06:57:39,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 305 transitions, 628 flow [2023-09-01 06:57:39,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:57:39,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 305 transitions, 628 flow [2023-09-01 06:57:39,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 305 transitions, 628 flow [2023-09-01 06:57:39,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 305 transitions, 628 flow [2023-09-01 06:57:39,891 INFO L130 PetriNetUnfolder]: 75/495 cut-off events. [2023-09-01 06:57:39,891 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:57:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 495 events. 75/495 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2023-09-01 06:57:39,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 45100 [2023-09-01 06:57:44,159 INFO L134 LiptonReduction]: Checked pairs total: 79232 [2023-09-01 06:57:44,159 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-09-01 06:57:44,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:44,168 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c0ec77e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:44,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:44,180 INFO L130 PetriNetUnfolder]: 38/132 cut-off events. [2023-09-01 06:57:44,180 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:57:44,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:44,181 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:57:44,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:44,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1111304713, now seen corresponding path program 1 times [2023-09-01 06:57:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:44,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102399359] [2023-09-01 06:57:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:44,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102399359] [2023-09-01 06:57:44,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102399359] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:57:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:57:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:57:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488455503] [2023-09-01 06:57:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:57:44,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:57:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:57:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:57:44,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 576 [2023-09-01 06:57:44,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:44,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:44,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 576 [2023-09-01 06:57:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:46,640 INFO L130 PetriNetUnfolder]: 19341/29803 cut-off events. [2023-09-01 06:57:46,641 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2023-09-01 06:57:46,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58384 conditions, 29803 events. 19341/29803 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 210941 event pairs, 18264 based on Foata normal form. 3745/24741 useless extension candidates. Maximal degree in co-relation 34945. Up to 28465 conditions per place. [2023-09-01 06:57:46,731 INFO L137 encePairwiseOnDemand]: 538/576 looper letters, 46 selfloop transitions, 2 changer transitions 28/83 dead transitions. [2023-09-01 06:57:46,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 328 flow [2023-09-01 06:57:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:57:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:57:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-09-01 06:57:46,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086805555555556 [2023-09-01 06:57:46,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-09-01 06:57:46,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-09-01 06:57:46,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:46,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-09-01 06:57:46,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:46,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:46,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:46,742 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 252 flow. Second operand 3 states and 879 transitions. [2023-09-01 06:57:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 328 flow [2023-09-01 06:57:46,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:57:46,749 INFO L231 Difference]: Finished difference. Result has 84 places, 55 transitions, 132 flow [2023-09-01 06:57:46,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=84, PETRI_TRANSITIONS=55} [2023-09-01 06:57:46,750 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -1 predicate places. [2023-09-01 06:57:46,751 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 55 transitions, 132 flow [2023-09-01 06:57:46,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:46,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:46,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:57:46,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:46,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1399516395, now seen corresponding path program 1 times [2023-09-01 06:57:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535074849] [2023-09-01 06:57:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535074849] [2023-09-01 06:57:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535074849] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035610653] [2023-09-01 06:57:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:46,817 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) [2023-09-01 06:57:46,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 06:57:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:57:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:46,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:46,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035610653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:46,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:46,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:57:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363503054] [2023-09-01 06:57:46,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:46,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:57:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:57:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:57:46,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 576 [2023-09-01 06:57:46,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 55 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 257.7142857142857) internal successors, (1804), 7 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:46,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:46,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 576 [2023-09-01 06:57:46,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:47,594 INFO L130 PetriNetUnfolder]: 4260/6747 cut-off events. [2023-09-01 06:57:47,594 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-09-01 06:57:47,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13290 conditions, 6747 events. 4260/6747 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42334 event pairs, 4055 based on Foata normal form. 0/4336 useless extension candidates. Maximal degree in co-relation 13277. Up to 6455 conditions per place. [2023-09-01 06:57:47,616 INFO L137 encePairwiseOnDemand]: 573/576 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-09-01 06:57:47,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 246 flow [2023-09-01 06:57:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:57:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:57:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1590 transitions. [2023-09-01 06:57:47,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600694444444444 [2023-09-01 06:57:47,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1590 transitions. [2023-09-01 06:57:47,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1590 transitions. [2023-09-01 06:57:47,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:47,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1590 transitions. [2023-09-01 06:57:47,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:47,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 576.0) internal successors, (4032), 7 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:47,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 576.0) internal successors, (4032), 7 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:47,634 INFO L175 Difference]: Start difference. First operand has 84 places, 55 transitions, 132 flow. Second operand 6 states and 1590 transitions. [2023-09-01 06:57:47,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 246 flow [2023-09-01 06:57:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 240 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:47,637 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 162 flow [2023-09-01 06:57:47,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-09-01 06:57:47,640 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -19 predicate places. [2023-09-01 06:57:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 162 flow [2023-09-01 06:57:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 257.7142857142857) internal successors, (1804), 7 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:47,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:47,641 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:57:47,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 06:57:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:47,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:47,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:47,853 INFO L85 PathProgramCache]: Analyzing trace with hash -225774857, now seen corresponding path program 2 times [2023-09-01 06:57:47,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:47,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842129367] [2023-09-01 06:57:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:47,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842129367] [2023-09-01 06:57:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842129367] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621419430] [2023-09-01 06:57:47,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:57:47,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:47,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:47,955 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) [2023-09-01 06:57:47,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 06:57:48,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:57:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:57:48,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:57:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:57:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621419430] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:48,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:48,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:57:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842453238] [2023-09-01 06:57:48,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:57:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:57:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:57:48,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 576 [2023-09-01 06:57:48,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:48,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:48,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 576 [2023-09-01 06:57:48,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:48,789 INFO L130 PetriNetUnfolder]: 4260/6753 cut-off events. [2023-09-01 06:57:48,789 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 06:57:48,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13321 conditions, 6753 events. 4260/6753 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42324 event pairs, 4055 based on Foata normal form. 6/4349 useless extension candidates. Maximal degree in co-relation 13262. Up to 6455 conditions per place. [2023-09-01 06:57:48,817 INFO L137 encePairwiseOnDemand]: 573/576 looper letters, 46 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-09-01 06:57:48,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 312 flow [2023-09-01 06:57:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:57:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:57:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3135 transitions. [2023-09-01 06:57:48,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535590277777778 [2023-09-01 06:57:48,826 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3135 transitions. [2023-09-01 06:57:48,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3135 transitions. [2023-09-01 06:57:48,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:48,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3135 transitions. [2023-09-01 06:57:48,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.25) internal successors, (3135), 12 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:48,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 576.0) internal successors, (7488), 13 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:48,844 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 576.0) internal successors, (7488), 13 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:48,845 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 162 flow. Second operand 12 states and 3135 transitions. [2023-09-01 06:57:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 312 flow [2023-09-01 06:57:48,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 298 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:48,847 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 232 flow [2023-09-01 06:57:48,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=232, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-09-01 06:57:48,848 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-09-01 06:57:48,848 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 232 flow [2023-09-01 06:57:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:48,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:48,850 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:57:48,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 06:57:49,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:49,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:49,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash 695791223, now seen corresponding path program 3 times [2023-09-01 06:57:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:49,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041631537] [2023-09-01 06:57:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:49,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:57:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:49,147 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:57:49,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:57:49,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:57:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:57:49,150 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:57:49,150 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:57:49,150 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:57:49,150 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:57:49,187 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:57:49,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 391 transitions, 812 flow [2023-09-01 06:57:49,301 INFO L130 PetriNetUnfolder]: 110/733 cut-off events. [2023-09-01 06:57:49,301 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:57:49,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 733 events. 110/733 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3303 event pairs, 1 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2023-09-01 06:57:49,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 391 transitions, 812 flow [2023-09-01 06:57:49,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 389 transitions, 808 flow [2023-09-01 06:57:49,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:57:49,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2023-09-01 06:57:49,326 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2023-09-01 06:57:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2023-09-01 06:57:49,430 INFO L130 PetriNetUnfolder]: 110/731 cut-off events. [2023-09-01 06:57:49,430 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:57:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 731 events. 110/731 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3297 event pairs, 1 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-09-01 06:57:49,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 88560 [2023-09-01 06:57:54,220 INFO L134 LiptonReduction]: Checked pairs total: 155413 [2023-09-01 06:57:54,221 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-09-01 06:57:54,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:54,222 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;@4c0ec77e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:54,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:54,236 INFO L130 PetriNetUnfolder]: 59/201 cut-off events. [2023-09-01 06:57:54,236 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:57:54,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:54,236 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:54,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:54,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash 870722083, now seen corresponding path program 1 times [2023-09-01 06:57:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153314694] [2023-09-01 06:57:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:54,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:57:54,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153314694] [2023-09-01 06:57:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153314694] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:57:54,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:57:54,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:57:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561760653] [2023-09-01 06:57:54,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:57:54,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:57:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:57:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:57:54,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 737 [2023-09-01 06:57:54,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 152 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:57:54,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:54,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 737 [2023-09-01 06:57:54,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:40,773 INFO L130 PetriNetUnfolder]: 502526/697269 cut-off events. [2023-09-01 06:58:40,773 INFO L131 PetriNetUnfolder]: For 4983/4983 co-relation queries the response was YES. [2023-09-01 06:58:42,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359259 conditions, 697269 events. 502526/697269 cut-off events. For 4983/4983 co-relation queries the response was YES. Maximal size of possible extension queue 20829. Compared 5918545 event pairs, 481563 based on Foata normal form. 113160/604926 useless extension candidates. Maximal degree in co-relation 82730. Up to 658990 conditions per place. [2023-09-01 06:58:42,947 INFO L137 encePairwiseOnDemand]: 687/737 looper letters, 63 selfloop transitions, 2 changer transitions 29/106 dead transitions. [2023-09-01 06:58:42,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 422 flow [2023-09-01 06:58:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:58:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:58:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-09-01 06:58:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047489823609227 [2023-09-01 06:58:42,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-09-01 06:58:42,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-09-01 06:58:42,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:42,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-09-01 06:58:42,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:42,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:42,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:42,971 INFO L175 Difference]: Start difference. First operand has 110 places, 152 transitions, 334 flow. Second operand 3 states and 1116 transitions. [2023-09-01 06:58:42,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 422 flow [2023-09-01 06:58:42,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:58:42,975 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 185 flow [2023-09-01 06:58:42,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2023-09-01 06:58:42,976 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -3 predicate places. [2023-09-01 06:58:42,976 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 185 flow [2023-09-01 06:58:42,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:42,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:58:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:58:42,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:42,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1195216674, now seen corresponding path program 1 times [2023-09-01 06:58:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:42,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086680912] [2023-09-01 06:58:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:43,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086680912] [2023-09-01 06:58:43,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086680912] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:43,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164532999] [2023-09-01 06:58:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:43,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:43,345 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) [2023-09-01 06:58:43,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 06:58:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:58:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:43,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164532999] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:43,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:43,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:58:43,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805497391] [2023-09-01 06:58:43,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:43,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:58:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:58:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:58:43,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 737 [2023-09-01 06:58:43,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:43,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:43,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 737 [2023-09-01 06:58:43,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:52,171 INFO L130 PetriNetUnfolder]: 112970/158317 cut-off events. [2023-09-01 06:58:52,171 INFO L131 PetriNetUnfolder]: For 2497/2497 co-relation queries the response was YES. [2023-09-01 06:58:52,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309517 conditions, 158317 events. 112970/158317 cut-off events. For 2497/2497 co-relation queries the response was YES. Maximal size of possible extension queue 5825. Compared 1226214 event pairs, 108187 based on Foata normal form. 0/104674 useless extension candidates. Maximal degree in co-relation 309503. Up to 149347 conditions per place. [2023-09-01 06:58:52,804 INFO L137 encePairwiseOnDemand]: 734/737 looper letters, 63 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 06:58:52,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 333 flow [2023-09-01 06:58:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:58:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:58:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2021 transitions. [2023-09-01 06:58:52,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45703301673450925 [2023-09-01 06:58:52,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2021 transitions. [2023-09-01 06:58:52,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2021 transitions. [2023-09-01 06:58:52,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:52,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2021 transitions. [2023-09-01 06:58:52,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 336.8333333333333) internal successors, (2021), 6 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:52,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:52,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:52,822 INFO L175 Difference]: Start difference. First operand has 107 places, 77 transitions, 185 flow. Second operand 6 states and 2021 transitions. [2023-09-01 06:58:52,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 333 flow [2023-09-01 06:58:52,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 323 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 06:58:52,826 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 211 flow [2023-09-01 06:58:52,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2023-09-01 06:58:52,827 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -21 predicate places. [2023-09-01 06:58:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 211 flow [2023-09-01 06:58:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:52,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:58:52,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 06:58:53,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 06:58:53,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:53,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 18280931, now seen corresponding path program 2 times [2023-09-01 06:58:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147416788] [2023-09-01 06:58:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147416788] [2023-09-01 06:58:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147416788] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420311173] [2023-09-01 06:58:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:58:53,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:53,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:58:53,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 06:58:53,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:58:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:58:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:58:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:53,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420311173] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:53,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:58:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801852305] [2023-09-01 06:58:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:58:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:58:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:58:53,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 737 [2023-09-01 06:58:53,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 326.46153846153845) internal successors, (4244), 13 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:53,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:53,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 737 [2023-09-01 06:58:53,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:59:03,412 INFO L130 PetriNetUnfolder]: 112970/158323 cut-off events. [2023-09-01 06:59:03,413 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 06:59:03,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308940 conditions, 158323 events. 112970/158323 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 5825. Compared 1226483 event pairs, 108187 based on Foata normal form. 6/104687 useless extension candidates. Maximal degree in co-relation 308880. Up to 149347 conditions per place. [2023-09-01 06:59:04,188 INFO L137 encePairwiseOnDemand]: 734/737 looper letters, 63 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-09-01 06:59:04,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 86 transitions, 395 flow [2023-09-01 06:59:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:59:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:59:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3980 transitions. [2023-09-01 06:59:04,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500226142017187 [2023-09-01 06:59:04,199 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3980 transitions. [2023-09-01 06:59:04,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3980 transitions. [2023-09-01 06:59:04,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:59:04,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3980 transitions. [2023-09-01 06:59:04,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 331.6666666666667) internal successors, (3980), 12 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:04,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 737.0) internal successors, (9581), 13 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:04,224 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 737.0) internal successors, (9581), 13 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:04,225 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 211 flow. Second operand 12 states and 3980 transitions. [2023-09-01 06:59:04,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 86 transitions, 395 flow [2023-09-01 06:59:04,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 86 transitions, 381 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:59:04,229 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 281 flow [2023-09-01 06:59:04,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=105, PETRI_TRANSITIONS=86} [2023-09-01 06:59:04,230 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2023-09-01 06:59:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 281 flow [2023-09-01 06:59:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 326.46153846153845) internal successors, (4244), 13 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:59:04,231 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:59:04,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 06:59:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:59:04,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:59:04,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:59:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1327720061, now seen corresponding path program 3 times [2023-09-01 06:59:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:59:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092791680] [2023-09-01 06:59:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:59:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:59:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:59:04,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:59:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:59:04,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:59:04,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:59:04,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:59:04,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:59:04,520 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:59:04,521 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:59:04,521 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:59:04,521 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:59:04,560 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:59:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 411 places, 475 transitions, 994 flow [2023-09-01 06:59:04,745 INFO L130 PetriNetUnfolder]: 157/1049 cut-off events. [2023-09-01 06:59:04,746 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:59:04,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 1049 events. 157/1049 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5192 event pairs, 6 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 753. Up to 32 conditions per place. [2023-09-01 06:59:04,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 475 transitions, 994 flow [2023-09-01 06:59:04,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 473 transitions, 990 flow [2023-09-01 06:59:04,786 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:59:04,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 473 transitions, 990 flow [2023-09-01 06:59:04,787 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 473 transitions, 990 flow [2023-09-01 06:59:04,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 473 transitions, 990 flow [2023-09-01 06:59:04,922 INFO L130 PetriNetUnfolder]: 157/1047 cut-off events. [2023-09-01 06:59:04,923 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:59:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 1047 events. 157/1047 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5195 event pairs, 6 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 751. Up to 32 conditions per place. [2023-09-01 06:59:05,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 145960 [2023-09-01 06:59:11,244 INFO L134 LiptonReduction]: Checked pairs total: 266543 [2023-09-01 06:59:11,244 INFO L136 LiptonReduction]: Total number of compositions: 428 [2023-09-01 06:59:11,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:59:11,246 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;@4c0ec77e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:59:11,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:59:11,266 INFO L130 PetriNetUnfolder]: 80/284 cut-off events. [2023-09-01 06:59:11,266 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:59:11,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:59:11,266 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:59:11,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:59:11,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:59:11,267 INFO L85 PathProgramCache]: Analyzing trace with hash -870879168, now seen corresponding path program 1 times [2023-09-01 06:59:11,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:59:11,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805086703] [2023-09-01 06:59:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:59:11,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:59:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:59:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 06:59:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:59:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805086703] [2023-09-01 06:59:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805086703] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:59:11,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:59:11,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:59:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202446086] [2023-09-01 06:59:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:59:11,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:59:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:59:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:59:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:59:11,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 903 [2023-09-01 06:59:11,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 186 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 397.6666666666667) internal successors, (1193), 3 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:11,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:59:11,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 903 [2023-09-01 06:59:11,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand