./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_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_75-tricky_address2_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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --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 06:56:18,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:56:18,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:56:19,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:56:19,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:56:19,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:56:19,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:56:19,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:56:19,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:56:19,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:56:19,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:56:19,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:56:19,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:56:19,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:56:19,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:56:19,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:56:19,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:56:19,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:56:19,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:56:19,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:56:19,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:56:19,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:56:19,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:56:19,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:56:19,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:56:19,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:56:19,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:56:19,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:56:19,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:56:19,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:56:19,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:56:19,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:56:19,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:56:19,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:56:19,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:56:19,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:56:19,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:56:19,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:56:19,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:56:19,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:56:19,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:56:19,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:56:19,109 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:56:19,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:56:19,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:56:19,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:56:19,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:56:19,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:56:19,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:56:19,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:56:19,112 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:56:19,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:56:19,112 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:56:19,112 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:56:19,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:56:19,113 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:56:19,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:56:19,114 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:56:19,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:56:19,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:56:19,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:56:19,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:56:19,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:56:19,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:56:19,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:56:19,116 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:56:19,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:56:19,116 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:56:19,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:56:19,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:56:19,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:56:19,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:56:19,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:56:19,487 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:56:19,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 06:56:20,561 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:56:20,847 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:56:20,847 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 06:56:20,856 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f8cd3d1/3a75123ac72143f28715f5a50f904594/FLAGeaf5ee322 [2023-09-01 06:56:20,866 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f8cd3d1/3a75123ac72143f28715f5a50f904594 [2023-09-01 06:56:20,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:56:20,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:56:20,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:56:20,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:56:20,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:56:20,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:56:20" (1/1) ... [2023-09-01 06:56:20,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a3470f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:20, skipping insertion in model container [2023-09-01 06:56:20,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:56:20" (1/1) ... [2023-09-01 06:56:20,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:56:20,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:56:21,223 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 06:56:21,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:56:21,279 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:56:21,326 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 06:56:21,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:56:21,391 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:56:21,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21 WrapperNode [2023-09-01 06:56:21,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:56:21,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:56:21,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:56:21,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:56:21,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,462 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 204 [2023-09-01 06:56:21,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:56:21,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:56:21,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:56:21,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:56:21,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:56:21,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:56:21,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:56:21,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:56:21,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (1/1) ... [2023-09-01 06:56:21,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:56:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:21,524 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 06:56:21,526 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 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:56:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:56:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:56:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:56:21,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:56:21,581 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 06:56:21,746 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:56:21,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:56:22,060 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:56:22,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:56:22,067 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 06:56:22,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:56:22 BoogieIcfgContainer [2023-09-01 06:56:22,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:56:22,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:56:22,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:56:22,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:56:22,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:56:20" (1/3) ... [2023-09-01 06:56:22,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8b9ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:56:22, skipping insertion in model container [2023-09-01 06:56:22,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:56:21" (2/3) ... [2023-09-01 06:56:22,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8b9ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:56:22, skipping insertion in model container [2023-09-01 06:56:22,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:56:22" (3/3) ... [2023-09-01 06:56:22,082 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-09-01 06:56:22,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:56:22,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:56:22,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-09-01 06:56:22,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:56:22,144 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:56:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 216 transitions, 440 flow [2023-09-01 06:56:22,316 INFO L130 PetriNetUnfolder]: 45/293 cut-off events. [2023-09-01 06:56:22,316 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 06:56:22,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 293 events. 45/293 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 998 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-09-01 06:56:22,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 216 transitions, 440 flow [2023-09-01 06:56:22,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:22,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:22,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:22,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 205 transitions, 415 flow [2023-09-01 06:56:22,400 INFO L130 PetriNetUnfolder]: 44/282 cut-off events. [2023-09-01 06:56:22,401 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:22,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 282 events. 44/282 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 944 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-09-01 06:56:22,408 INFO L119 LiptonReduction]: Number of co-enabled transitions 13050 [2023-09-01 06:56:25,048 INFO L134 LiptonReduction]: Checked pairs total: 21856 [2023-09-01 06:56:25,051 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-09-01 06:56:25,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:25,078 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;@292e3cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:25,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:25,088 INFO L130 PetriNetUnfolder]: 11/44 cut-off events. [2023-09-01 06:56:25,088 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:25,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:25,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 06:56:25,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:25,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1194161998, now seen corresponding path program 1 times [2023-09-01 06:56:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774916879] [2023-09-01 06:56:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:25,320 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 06:56:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774916879] [2023-09-01 06:56:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774916879] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:25,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:25,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:25,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651927787] [2023-09-01 06:56:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:25,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 394 [2023-09-01 06:56:25,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 74 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:25,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:25,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 394 [2023-09-01 06:56:25,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:25,556 INFO L130 PetriNetUnfolder]: 454/967 cut-off events. [2023-09-01 06:56:25,556 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:25,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 967 events. 454/967 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5366 event pairs, 414 based on Foata normal form. 131/814 useless extension candidates. Maximal degree in co-relation 1806. Up to 894 conditions per place. [2023-09-01 06:56:25,562 INFO L137 encePairwiseOnDemand]: 369/394 looper letters, 26 selfloop transitions, 2 changer transitions 21/53 dead transitions. [2023-09-01 06:56:25,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 203 flow [2023-09-01 06:56:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:56:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:56:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-09-01 06:56:25,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177664974619289 [2023-09-01 06:56:25,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-09-01 06:56:25,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-09-01 06:56:25,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:25,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-09-01 06:56:25,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 06:56:25,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 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 06:56:25,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 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 06:56:25,608 INFO L175 Difference]: Start difference. First operand has 53 places, 74 transitions, 153 flow. Second operand 3 states and 612 transitions. [2023-09-01 06:56:25,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 203 flow [2023-09-01 06:56:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:56:25,612 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 79 flow [2023-09-01 06:56:25,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2023-09-01 06:56:25,617 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-09-01 06:56:25,617 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 79 flow [2023-09-01 06:56:25,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:56:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:25,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:56:25,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:25,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -515934527, now seen corresponding path program 1 times [2023-09-01 06:56:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:25,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786779909] [2023-09-01 06:56:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:25,730 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 06:56:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786779909] [2023-09-01 06:56:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786779909] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464396836] [2023-09-01 06:56:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:25,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:25,734 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 06:56:25,743 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 06:56:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:56:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:25,876 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 06:56:25,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:25,901 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 06:56:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464396836] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:25,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:56:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727328071] [2023-09-01 06:56:25,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:56:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:56:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:56:25,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 394 [2023-09-01 06:56:25,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 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 06:56:25,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:25,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 394 [2023-09-01 06:56:25,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:25,973 INFO L130 PetriNetUnfolder]: 97/233 cut-off events. [2023-09-01 06:56:25,973 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:56:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 233 events. 97/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 90 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 451. Up to 210 conditions per place. [2023-09-01 06:56:25,974 INFO L137 encePairwiseOnDemand]: 391/394 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-09-01 06:56:25,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 153 flow [2023-09-01 06:56:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:56:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:56:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1114 transitions. [2023-09-01 06:56:25,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712351945854484 [2023-09-01 06:56:25,977 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1114 transitions. [2023-09-01 06:56:25,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1114 transitions. [2023-09-01 06:56:25,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:25,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1114 transitions. [2023-09-01 06:56:25,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.66666666666666) internal successors, (1114), 6 states have internal predecessors, (1114), 0 states have call successors, (0), 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 06:56:25,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 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 06:56:25,985 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 394.0) internal successors, (2758), 7 states have internal predecessors, (2758), 0 states have call successors, (0), 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 06:56:25,985 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 79 flow. Second operand 6 states and 1114 transitions. [2023-09-01 06:56:25,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 153 flow [2023-09-01 06:56:25,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 149 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:25,986 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2023-09-01 06:56:25,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, 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 06:56:25,987 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2023-09-01 06:56:25,987 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2023-09-01 06:56:25,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 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 06:56:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:26,014 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 06:56:26,214 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 06:56:26,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:26,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash -475720590, now seen corresponding path program 2 times [2023-09-01 06:56:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:26,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921737922] [2023-09-01 06:56:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:26,361 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 06:56:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921737922] [2023-09-01 06:56:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921737922] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811603878] [2023-09-01 06:56:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:56:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:26,365 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 06:56:26,381 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 06:56:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:56:26,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:56:26,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:56:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:26,466 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 06:56:26,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:26,507 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 06:56:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811603878] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:26,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:56:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423392051] [2023-09-01 06:56:26,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:26,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:56:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:56:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:56:26,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 394 [2023-09-01 06:56:26,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 13 states, 13 states have (on average 181.30769230769232) internal successors, (2357), 13 states have internal predecessors, (2357), 0 states have call successors, (0), 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 06:56:26,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:26,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 394 [2023-09-01 06:56:26,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:26,626 INFO L130 PetriNetUnfolder]: 97/239 cut-off events. [2023-09-01 06:56:26,626 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 06:56:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 239 events. 97/239 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 864 event pairs, 90 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 442. Up to 210 conditions per place. [2023-09-01 06:56:26,627 INFO L137 encePairwiseOnDemand]: 391/394 looper letters, 26 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2023-09-01 06:56:26,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 221 flow [2023-09-01 06:56:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:56:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:56:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2203 transitions. [2023-09-01 06:56:26,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659475465313029 [2023-09-01 06:56:26,631 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2203 transitions. [2023-09-01 06:56:26,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2203 transitions. [2023-09-01 06:56:26,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:26,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2203 transitions. [2023-09-01 06:56:26,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.58333333333334) internal successors, (2203), 12 states have internal predecessors, (2203), 0 states have call successors, (0), 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 06:56:26,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 394.0) internal successors, (5122), 13 states have internal predecessors, (5122), 0 states have call successors, (0), 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 06:56:26,644 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 394.0) internal successors, (5122), 13 states have internal predecessors, (5122), 0 states have call successors, (0), 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 06:56:26,644 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 12 states and 2203 transitions. [2023-09-01 06:56:26,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 221 flow [2023-09-01 06:56:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:26,647 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 181 flow [2023-09-01 06:56:26,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, 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 06:56:26,648 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-09-01 06:56:26,650 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 181 flow [2023-09-01 06:56:26,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 181.30769230769232) internal successors, (2357), 13 states have internal predecessors, (2357), 0 states have call successors, (0), 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 06:56:26,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:26,653 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:26,675 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 06:56:26,857 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 06:56:26,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:26,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2063180306, now seen corresponding path program 3 times [2023-09-01 06:56:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313521212] [2023-09-01 06:56:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:26,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:56:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:26,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:56:26,913 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:56:26,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:56:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:56:26,915 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:56:26,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:56:26,930 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:56:26,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:56:26,957 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:56:26,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 293 transitions, 604 flow [2023-09-01 06:56:26,995 INFO L130 PetriNetUnfolder]: 75/483 cut-off events. [2023-09-01 06:56:26,995 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:56:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 483 events. 75/483 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2032 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 295. Up to 12 conditions per place. [2023-09-01 06:56:26,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 293 transitions, 604 flow [2023-09-01 06:56:26,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:26,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:27,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:27,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:27,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 600 flow [2023-09-01 06:56:27,037 INFO L130 PetriNetUnfolder]: 75/481 cut-off events. [2023-09-01 06:56:27,037 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:56:27,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 481 events. 75/481 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2009 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 293. Up to 12 conditions per place. [2023-09-01 06:56:27,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 40200 [2023-09-01 06:56:30,225 INFO L134 LiptonReduction]: Checked pairs total: 72218 [2023-09-01 06:56:30,226 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-09-01 06:56:30,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:30,228 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;@292e3cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:30,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:30,234 INFO L130 PetriNetUnfolder]: 36/120 cut-off events. [2023-09-01 06:56:30,236 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:56:30,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:30,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:30,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:30,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1526394189, now seen corresponding path program 1 times [2023-09-01 06:56:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:30,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478325596] [2023-09-01 06:56:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:30,277 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 06:56:30,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:30,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478325596] [2023-09-01 06:56:30,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478325596] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:30,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143192857] [2023-09-01 06:56:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:30,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 544 [2023-09-01 06:56:30,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 06:56:30,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:30,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 544 [2023-09-01 06:56:30,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:32,187 INFO L130 PetriNetUnfolder]: 18204/28758 cut-off events. [2023-09-01 06:56:32,188 INFO L131 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2023-09-01 06:56:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55582 conditions, 28758 events. 18204/28758 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 214669 event pairs, 17105 based on Foata normal form. 4139/24418 useless extension candidates. Maximal degree in co-relation 24620. Up to 26706 conditions per place. [2023-09-01 06:56:32,250 INFO L137 encePairwiseOnDemand]: 510/544 looper letters, 44 selfloop transitions, 2 changer transitions 28/83 dead transitions. [2023-09-01 06:56:32,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 326 flow [2023-09-01 06:56:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:56:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:56:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-09-01 06:56:32,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-09-01 06:56:32,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-09-01 06:56:32,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-09-01 06:56:32,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:32,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-09-01 06:56:32,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 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 06:56:32,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 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 06:56:32,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 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 06:56:32,260 INFO L175 Difference]: Start difference. First operand has 81 places, 113 transitions, 244 flow. Second operand 3 states and 832 transitions. [2023-09-01 06:56:32,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 326 flow [2023-09-01 06:56:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:56:32,266 INFO L231 Difference]: Finished difference. Result has 84 places, 55 transitions, 132 flow [2023-09-01 06:56:32,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, 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 06:56:32,267 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2023-09-01 06:56:32,267 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 55 transitions, 132 flow [2023-09-01 06:56:32,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 06:56:32,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:32,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:32,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:56:32,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:32,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -607571975, now seen corresponding path program 1 times [2023-09-01 06:56:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334694082] [2023-09-01 06:56:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:32,318 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 06:56:32,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:32,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334694082] [2023-09-01 06:56:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334694082] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:32,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015934816] [2023-09-01 06:56:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:32,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:32,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:32,339 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 06:56:32,340 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 06:56:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:56:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:32,419 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 06:56:32,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:32,437 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 06:56:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015934816] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:32,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:32,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:56:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501269098] [2023-09-01 06:56:32,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:56:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:56:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:56:32,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 544 [2023-09-01 06:56:32,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 55 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 243.71428571428572) internal successors, (1706), 7 states have internal predecessors, (1706), 0 states have call successors, (0), 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 06:56:32,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:32,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 544 [2023-09-01 06:56:32,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:32,922 INFO L130 PetriNetUnfolder]: 3866/6297 cut-off events. [2023-09-01 06:56:32,923 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-09-01 06:56:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 6297 events. 3866/6297 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42417 event pairs, 3649 based on Foata normal form. 0/4047 useless extension candidates. Maximal degree in co-relation 12197. Up to 5821 conditions per place. [2023-09-01 06:56:32,935 INFO L137 encePairwiseOnDemand]: 541/544 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-09-01 06:56:32,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 242 flow [2023-09-01 06:56:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:56:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:56:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1504 transitions. [2023-09-01 06:56:32,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-09-01 06:56:32,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1504 transitions. [2023-09-01 06:56:32,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1504 transitions. [2023-09-01 06:56:32,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:32,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1504 transitions. [2023-09-01 06:56:32,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 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 06:56:32,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 544.0) internal successors, (3808), 7 states have internal predecessors, (3808), 0 states have call successors, (0), 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 06:56:32,945 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 544.0) internal successors, (3808), 7 states have internal predecessors, (3808), 0 states have call successors, (0), 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 06:56:32,945 INFO L175 Difference]: Start difference. First operand has 84 places, 55 transitions, 132 flow. Second operand 6 states and 1504 transitions. [2023-09-01 06:56:32,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 242 flow [2023-09-01 06:56:32,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 236 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:32,946 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 162 flow [2023-09-01 06:56:32,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, 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 06:56:32,947 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -15 predicate places. [2023-09-01 06:56:32,947 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 162 flow [2023-09-01 06:56:32,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 243.71428571428572) internal successors, (1706), 7 states have internal predecessors, (1706), 0 states have call successors, (0), 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 06:56:32,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:32,947 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:32,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 06:56:33,158 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 06:56:33,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:33,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1036793933, now seen corresponding path program 2 times [2023-09-01 06:56:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:33,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937298944] [2023-09-01 06:56:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:33,212 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 06:56:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937298944] [2023-09-01 06:56:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937298944] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:56:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074818097] [2023-09-01 06:56:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:56:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:56:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:56:33,214 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 06:56:33,229 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 06:56:33,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:56:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:56:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:56:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:56:33,318 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 06:56:33,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:56:33,365 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 06:56:33,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074818097] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:56:33,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:56:33,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:56:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266141722] [2023-09-01 06:56:33,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:56:33,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:56:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:56:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:56:33,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 544 [2023-09-01 06:56:33,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 243.3846153846154) internal successors, (3164), 13 states have internal predecessors, (3164), 0 states have call successors, (0), 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 06:56:33,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:33,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 544 [2023-09-01 06:56:33,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:56:33,898 INFO L130 PetriNetUnfolder]: 3866/6303 cut-off events. [2023-09-01 06:56:33,898 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 06:56:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 6303 events. 3866/6303 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42376 event pairs, 3649 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 12180. Up to 5821 conditions per place. [2023-09-01 06:56:33,917 INFO L137 encePairwiseOnDemand]: 541/544 looper letters, 44 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-09-01 06:56:33,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 308 flow [2023-09-01 06:56:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:56:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:56:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2965 transitions. [2023-09-01 06:56:33,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45419730392156865 [2023-09-01 06:56:33,925 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2965 transitions. [2023-09-01 06:56:33,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2965 transitions. [2023-09-01 06:56:33,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:56:33,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2965 transitions. [2023-09-01 06:56:33,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 247.08333333333334) internal successors, (2965), 12 states have internal predecessors, (2965), 0 states have call successors, (0), 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 06:56:33,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 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 06:56:33,940 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 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 06:56:33,940 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 162 flow. Second operand 12 states and 2965 transitions. [2023-09-01 06:56:33,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 308 flow [2023-09-01 06:56:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 294 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:56:33,943 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 232 flow [2023-09-01 06:56:33,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, 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 06:56:33,944 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2023-09-01 06:56:33,944 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 232 flow [2023-09-01 06:56:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 243.3846153846154) internal successors, (3164), 13 states have internal predecessors, (3164), 0 states have call successors, (0), 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 06:56:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:33,946 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:56:33,967 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 06:56:34,151 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 06:56:34,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:34,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash 500881613, now seen corresponding path program 3 times [2023-09-01 06:56:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:34,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236341351] [2023-09-01 06:56:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:34,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:56:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:56:34,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:56:34,212 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:56:34,212 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:56:34,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:56:34,212 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:56:34,213 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:56:34,213 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:56:34,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:56:34,247 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:56:34,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 370 transitions, 770 flow [2023-09-01 06:56:34,317 INFO L130 PetriNetUnfolder]: 110/712 cut-off events. [2023-09-01 06:56:34,317 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:56:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 712 events. 110/712 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3261 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 491. Up to 16 conditions per place. [2023-09-01 06:56:34,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 370 transitions, 770 flow [2023-09-01 06:56:34,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:34,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:56:34,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:34,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:34,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 368 transitions, 766 flow [2023-09-01 06:56:34,396 INFO L130 PetriNetUnfolder]: 110/710 cut-off events. [2023-09-01 06:56:34,396 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:56:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 710 events. 110/710 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3255 event pairs, 1 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 489. Up to 16 conditions per place. [2023-09-01 06:56:34,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 77850 [2023-09-01 06:56:38,605 INFO L134 LiptonReduction]: Checked pairs total: 141588 [2023-09-01 06:56:38,605 INFO L136 LiptonReduction]: Total number of compositions: 316 [2023-09-01 06:56:38,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:56:38,607 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;@292e3cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:56:38,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:56:38,628 INFO L130 PetriNetUnfolder]: 60/196 cut-off events. [2023-09-01 06:56:38,629 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:56:38,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:56:38,629 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:56:38,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:56:38,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:56:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1592646139, now seen corresponding path program 1 times [2023-09-01 06:56:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:56:38,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396190644] [2023-09-01 06:56:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:56:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:56:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:56:38,657 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 06:56:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:56:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396190644] [2023-09-01 06:56:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396190644] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:56:38,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:56:38,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:56:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960654566] [2023-09-01 06:56:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:56:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:56:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:56:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:56:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:56:38,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 686 [2023-09-01 06:56:38,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 147 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 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 06:56:38,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:56:38,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 686 [2023-09-01 06:56:38,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:24,277 INFO L130 PetriNetUnfolder]: 574142/783224 cut-off events. [2023-09-01 06:57:24,277 INFO L131 PetriNetUnfolder]: For 5109/5109 co-relation queries the response was YES. [2023-09-01 06:57:25,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544042 conditions, 783224 events. 574142/783224 cut-off events. For 5109/5109 co-relation queries the response was YES. Maximal size of possible extension queue 19831. Compared 6248068 event pairs, 554452 based on Foata normal form. 98874/655857 useless extension candidates. Maximal degree in co-relation 329878. Up to 757862 conditions per place. [2023-09-01 06:57:26,206 INFO L137 encePairwiseOnDemand]: 641/686 looper letters, 65 selfloop transitions, 2 changer transitions 29/106 dead transitions. [2023-09-01 06:57:26,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 428 flow [2023-09-01 06:57:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:57:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:57:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1051 transitions. [2023-09-01 06:57:26,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510689990281827 [2023-09-01 06:57:26,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1051 transitions. [2023-09-01 06:57:26,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1051 transitions. [2023-09-01 06:57:26,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:26,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1051 transitions. [2023-09-01 06:57:26,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 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 06:57:26,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 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 06:57:26,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 686.0) internal successors, (2744), 4 states have internal predecessors, (2744), 0 states have call successors, (0), 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 06:57:26,216 INFO L175 Difference]: Start difference. First operand has 104 places, 147 transitions, 324 flow. Second operand 3 states and 1051 transitions. [2023-09-01 06:57:26,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 428 flow [2023-09-01 06:57:26,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 428 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:57:26,221 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 185 flow [2023-09-01 06:57:26,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, 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 06:57:26,222 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-09-01 06:57:26,222 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 185 flow [2023-09-01 06:57:26,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 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 06:57:26,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:26,223 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:57:26,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:26,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1869305623, now seen corresponding path program 1 times [2023-09-01 06:57:26,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:26,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26408278] [2023-09-01 06:57:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:26,259 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 06:57:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26408278] [2023-09-01 06:57:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26408278] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837464780] [2023-09-01 06:57:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:26,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:26,270 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 06:57:26,272 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 06:57:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:57:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:26,361 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 06:57:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:26,374 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 06:57:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837464780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:26,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:57:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711579482] [2023-09-01 06:57:26,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:26,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:57:26,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:57:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:57:26,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 686 [2023-09-01 06:57:26,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 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 06:57:26,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:26,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 686 [2023-09-01 06:57:26,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:37,761 INFO L130 PetriNetUnfolder]: 124250/171007 cut-off events. [2023-09-01 06:57:37,761 INFO L131 PetriNetUnfolder]: For 2404/2404 co-relation queries the response was YES. [2023-09-01 06:57:38,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338086 conditions, 171007 events. 124250/171007 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 5854. Compared 1265818 event pairs, 119875 based on Foata normal form. 0/113230 useless extension candidates. Maximal degree in co-relation 338072. Up to 165349 conditions per place. [2023-09-01 06:57:38,318 INFO L137 encePairwiseOnDemand]: 683/686 looper letters, 65 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 06:57:38,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 337 flow [2023-09-01 06:57:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:57:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:57:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1897 transitions. [2023-09-01 06:57:38,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608843537414966 [2023-09-01 06:57:38,322 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1897 transitions. [2023-09-01 06:57:38,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1897 transitions. [2023-09-01 06:57:38,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:38,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1897 transitions. [2023-09-01 06:57:38,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 316.1666666666667) internal successors, (1897), 6 states have internal predecessors, (1897), 0 states have call successors, (0), 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 06:57:38,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 0 states have call successors, (0), 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 06:57:38,330 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 686.0) internal successors, (4802), 7 states have internal predecessors, (4802), 0 states have call successors, (0), 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 06:57:38,330 INFO L175 Difference]: Start difference. First operand has 107 places, 77 transitions, 185 flow. Second operand 6 states and 1897 transitions. [2023-09-01 06:57:38,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 337 flow [2023-09-01 06:57:38,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 327 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:38,333 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 211 flow [2023-09-01 06:57:38,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, 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 06:57:38,333 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -15 predicate places. [2023-09-01 06:57:38,333 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 211 flow [2023-09-01 06:57:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 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 06:57:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:38,355 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 06:57:38,538 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 06:57:38,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:38,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 106879621, now seen corresponding path program 2 times [2023-09-01 06:57:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042863662] [2023-09-01 06:57:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:38,594 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 06:57:38,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:38,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042863662] [2023-09-01 06:57:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042863662] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:57:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806457882] [2023-09-01 06:57:38,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:57:38,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:57:38,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:57:38,596 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 06:57:38,598 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 06:57:38,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:57:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:57:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:57:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:57:38,692 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 06:57:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:57:38,739 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 06:57:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806457882] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:57:38,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:57:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:57:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291064186] [2023-09-01 06:57:38,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:57:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:57:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:57:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:57:38,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 686 [2023-09-01 06:57:38,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 305.46153846153845) internal successors, (3971), 13 states have internal predecessors, (3971), 0 states have call successors, (0), 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 06:57:38,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:38,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 686 [2023-09-01 06:57:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:57:49,441 INFO L130 PetriNetUnfolder]: 124250/171013 cut-off events. [2023-09-01 06:57:49,442 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:57:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337619 conditions, 171013 events. 124250/171013 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 5861. Compared 1265886 event pairs, 119875 based on Foata normal form. 6/113243 useless extension candidates. Maximal degree in co-relation 337559. Up to 165349 conditions per place. [2023-09-01 06:57:50,259 INFO L137 encePairwiseOnDemand]: 683/686 looper letters, 65 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-09-01 06:57:50,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 86 transitions, 399 flow [2023-09-01 06:57:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:57:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:57:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3730 transitions. [2023-09-01 06:57:50,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45310981535471334 [2023-09-01 06:57:50,296 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3730 transitions. [2023-09-01 06:57:50,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3730 transitions. [2023-09-01 06:57:50,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:57:50,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3730 transitions. [2023-09-01 06:57:50,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 310.8333333333333) internal successors, (3730), 12 states have internal predecessors, (3730), 0 states have call successors, (0), 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 06:57:50,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 686.0) internal successors, (8918), 13 states have internal predecessors, (8918), 0 states have call successors, (0), 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 06:57:50,335 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 686.0) internal successors, (8918), 13 states have internal predecessors, (8918), 0 states have call successors, (0), 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 06:57:50,335 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 211 flow. Second operand 12 states and 3730 transitions. [2023-09-01 06:57:50,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 86 transitions, 399 flow [2023-09-01 06:57:50,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 86 transitions, 385 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:57:50,338 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 281 flow [2023-09-01 06:57:50,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=686, 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 06:57:50,339 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-09-01 06:57:50,339 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 281 flow [2023-09-01 06:57:50,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 305.46153846153845) internal successors, (3971), 13 states have internal predecessors, (3971), 0 states have call successors, (0), 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 06:57:50,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:50,340 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:50,347 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 06:57:50,545 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 06:57:50,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:50,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1111306565, now seen corresponding path program 3 times [2023-09-01 06:57:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273731602] [2023-09-01 06:57:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:50,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:57:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:50,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:57:50,587 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:57:50,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:57:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:57:50,588 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:57:50,588 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:57:50,588 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:57:50,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:57:50,614 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:57:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 447 transitions, 938 flow [2023-09-01 06:57:50,846 INFO L130 PetriNetUnfolder]: 157/1021 cut-off events. [2023-09-01 06:57:50,860 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:57:50,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 1021 events. 157/1021 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5009 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 732. Up to 32 conditions per place. [2023-09-01 06:57:50,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 447 transitions, 938 flow [2023-09-01 06:57:50,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:50,896 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:57:50,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:50,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 445 transitions, 934 flow [2023-09-01 06:57:51,157 INFO L130 PetriNetUnfolder]: 157/1019 cut-off events. [2023-09-01 06:57:51,164 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 06:57:51,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 1019 events. 157/1019 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5018 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 730. Up to 32 conditions per place. [2023-09-01 06:57:51,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 127200 [2023-09-01 06:57:55,867 INFO L134 LiptonReduction]: Checked pairs total: 236773 [2023-09-01 06:57:55,867 INFO L136 LiptonReduction]: Total number of compositions: 384 [2023-09-01 06:57:55,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:55,869 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;@292e3cee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:55,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:55,966 INFO L130 PetriNetUnfolder]: 84/287 cut-off events. [2023-09-01 06:57:55,967 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:57:55,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:55,967 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:55,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:55,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -152640275, now seen corresponding path program 1 times [2023-09-01 06:57:55,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:55,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137636005] [2023-09-01 06:57:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:55,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:57:55,989 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 06:57:55,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:57:55,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137636005] [2023-09-01 06:57:55,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137636005] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:57:55,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:57:55,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:57:55,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976779443] [2023-09-01 06:57:55,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:57:55,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:57:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:57:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:57:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:57:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 831 [2023-09-01 06:57:55,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 179 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 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 06:57:56,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:57:56,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 831 [2023-09-01 06:57:56,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand