./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:10:51,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:10:51,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:10:51,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:10:51,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:10:51,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:10:51,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:10:51,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:10:51,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:10:51,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:10:51,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:10:51,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:10:51,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:10:51,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:10:51,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:10:51,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:10:51,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:10:51,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:10:51,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:10:51,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:10:51,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:10:51,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:10:51,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:10:51,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:10:51,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:10:51,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:10:51,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:10:51,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:10:51,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:10:51,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:10:51,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:10:51,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:10:51,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:10:51,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:10:51,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:10:51,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:10:51,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:10:51,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:10:51,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:10:51,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:10:51,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:10:51,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:10:51,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:10:51,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:10:51,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:10:51,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:10:51,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:10:51,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:10:51,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:10:51,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:10:51,735 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:10:51,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:10:51,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:10:51,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:10:51,738 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:10:51,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:10:51,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:10:51,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:10:51,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:10:51,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:10:51,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:10:51,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:10:51,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:10:51,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:10:51,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:10:51,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:10:51,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:10:51,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:10:51,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:10:51,740 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:10:51,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:10:51,741 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:10:51,741 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:10:52,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:10:52,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:10:52,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:10:52,046 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:10:52,046 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:10:52,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 11:10:53,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:10:53,332 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:10:53,332 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-09-01 11:10:53,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0927120e9/c55d67175de1439b9470cdcdeafe9818/FLAG1de62c78b [2023-09-01 11:10:53,361 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0927120e9/c55d67175de1439b9470cdcdeafe9818 [2023-09-01 11:10:53,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:10:53,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:10:53,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:10:53,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:10:53,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:10:53,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:10:53" (1/1) ... [2023-09-01 11:10:53,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff1bf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:53, skipping insertion in model container [2023-09-01 11:10:53,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:10:53" (1/1) ... [2023-09-01 11:10:53,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:10:53,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:10:53,856 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 11:10:53,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:10:53,913 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:10:53,951 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-09-01 11:10:53,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:10:54,012 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:10:54,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54 WrapperNode [2023-09-01 11:10:54,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:10:54,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:10:54,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:10:54,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:10:54,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,072 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-09-01 11:10:54,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:10:54,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:10:54,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:10:54,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:10:54,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:10:54,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:10:54,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:10:54,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:10:54,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (1/1) ... [2023-09-01 11:10:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:10:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:54,160 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 11:10:54,168 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 11:10:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:10:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:10:54,192 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:10:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:10:54,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:10:54,193 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 11:10:54,323 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:10:54,325 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:10:54,569 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:10:54,576 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:10:54,576 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 11:10:54,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:10:54 BoogieIcfgContainer [2023-09-01 11:10:54,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:10:54,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:10:54,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:10:54,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:10:54,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:10:53" (1/3) ... [2023-09-01 11:10:54,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203d9bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:10:54, skipping insertion in model container [2023-09-01 11:10:54,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:10:54" (2/3) ... [2023-09-01 11:10:54,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203d9bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:10:54, skipping insertion in model container [2023-09-01 11:10:54,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:10:54" (3/3) ... [2023-09-01 11:10:54,585 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-09-01 11:10:54,592 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:10:54,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:10:54,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 11:10:54,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:10:54,661 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:10:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-09-01 11:10:54,803 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-09-01 11:10:54,803 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 11:10:54,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-09-01 11:10:54,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-09-01 11:10:54,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-09-01 11:10:54,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:54,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-09-01 11:10:54,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-09-01 11:10:54,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-09-01 11:10:54,898 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-09-01 11:10:54,899 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:54,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-09-01 11:10:54,906 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-09-01 11:10:57,628 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-09-01 11:10:57,629 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-09-01 11:10:57,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:57,646 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;@382f14f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:57,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:57,651 INFO L130 PetriNetUnfolder]: 10/40 cut-off events. [2023-09-01 11:10:57,651 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:57,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:57,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:10:57,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:57,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -947284719, now seen corresponding path program 1 times [2023-09-01 11:10:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:57,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637754324] [2023-09-01 11:10:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:57,848 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 11:10:57,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:57,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637754324] [2023-09-01 11:10:57,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637754324] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:57,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:57,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637683007] [2023-09-01 11:10:57,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:57,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:57,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-09-01 11:10:57,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 11:10:57,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:57,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-09-01 11:10:57,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:58,069 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-09-01 11:10:58,070 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:58,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-09-01 11:10:58,073 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-09-01 11:10:58,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-09-01 11:10:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-09-01 11:10:58,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976657329598506 [2023-09-01 11:10:58,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-09-01 11:10:58,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-09-01 11:10:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:58,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-09-01 11:10:58,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 11:10:58,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 11:10:58,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 11:10:58,100 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 533 transitions. [2023-09-01 11:10:58,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-09-01 11:10:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:58,104 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-09-01 11:10:58,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-09-01 11:10:58,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-09-01 11:10:58,108 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-09-01 11:10:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 11:10:58,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:58,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:58,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:10:58,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:58,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333179, now seen corresponding path program 1 times [2023-09-01 11:10:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897054403] [2023-09-01 11:10:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:58,184 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 11:10:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:58,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897054403] [2023-09-01 11:10:58,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897054403] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:58,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956720777] [2023-09-01 11:10:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:58,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:58,189 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 11:10:58,222 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 11:10:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:58,356 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 11:10:58,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:58,370 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 11:10:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956720777] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:58,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116794230] [2023-09-01 11:10:58,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:58,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:58,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-09-01 11:10:58,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 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 11:10:58,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:58,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-09-01 11:10:58,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:58,502 INFO L130 PetriNetUnfolder]: 47/129 cut-off events. [2023-09-01 11:10:58,503 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:58,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 129 events. 47/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 245. Up to 108 conditions per place. [2023-09-01 11:10:58,504 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-09-01 11:10:58,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-09-01 11:10:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-09-01 11:10:58,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45284780578898226 [2023-09-01 11:10:58,507 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-09-01 11:10:58,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-09-01 11:10:58,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:58,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-09-01 11:10:58,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 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 11:10:58,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 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 11:10:58,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 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 11:10:58,516 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 970 transitions. [2023-09-01 11:10:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-09-01 11:10:58,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:58,517 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-09-01 11:10:58,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-09-01 11:10:58,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-09-01 11:10:58,518 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-09-01 11:10:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.57142857142858) internal successors, (1110), 7 states have internal predecessors, (1110), 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 11:10:58,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:58,520 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:58,528 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 11:10:58,725 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 11:10:58,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:58,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash 941146001, now seen corresponding path program 2 times [2023-09-01 11:10:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:58,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900791773] [2023-09-01 11:10:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:58,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:58,882 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 11:10:58,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900791773] [2023-09-01 11:10:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900791773] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:58,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570027972] [2023-09-01 11:10:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:58,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:58,887 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 11:10:58,894 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 11:10:58,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:58,982 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 11:10:58,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:59,036 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 11:10:59,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570027972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:59,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:59,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901129301] [2023-09-01 11:10:59,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:59,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-09-01 11:10:59,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 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 11:10:59,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:59,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-09-01 11:10:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:59,143 INFO L130 PetriNetUnfolder]: 47/135 cut-off events. [2023-09-01 11:10:59,144 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:10:59,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 135 events. 47/135 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 236. Up to 108 conditions per place. [2023-09-01 11:10:59,145 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-09-01 11:10:59,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-09-01 11:10:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1921 transitions. [2023-09-01 11:10:59,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-09-01 11:10:59,156 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1921 transitions. [2023-09-01 11:10:59,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1921 transitions. [2023-09-01 11:10:59,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:59,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1921 transitions. [2023-09-01 11:10:59,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.08333333333334) internal successors, (1921), 12 states have internal predecessors, (1921), 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 11:10:59,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 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 11:10:59,171 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 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 11:10:59,171 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1921 transitions. [2023-09-01 11:10:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-09-01 11:10:59,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:59,174 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-09-01 11:10:59,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-09-01 11:10:59,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-09-01 11:10:59,176 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-09-01 11:10:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.30769230769232) internal successors, (2058), 13 states have internal predecessors, (2058), 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 11:10:59,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:59,184 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 11:10:59,382 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 11:10:59,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:59,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1854023505, now seen corresponding path program 3 times [2023-09-01 11:10:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628789570] [2023-09-01 11:10:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:59,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:59,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:59,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:59,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:10:59,465 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:59,467 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:59,467 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:59,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:10:59,495 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:10:59,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,542 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-09-01 11:10:59,542 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:10:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-09-01 11:10:59,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:59,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-09-01 11:10:59,613 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-09-01 11:10:59,613 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:10:59,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-09-01 11:10:59,633 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-09-01 11:11:02,562 INFO L134 LiptonReduction]: Checked pairs total: 56804 [2023-09-01 11:11:02,563 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-09-01 11:11:02,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:11:02,576 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;@382f14f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:11:02,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:11:02,585 INFO L130 PetriNetUnfolder]: 36/108 cut-off events. [2023-09-01 11:11:02,585 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:11:02,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:02,585 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:11:02,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:02,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1388603768, now seen corresponding path program 1 times [2023-09-01 11:11:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123597849] [2023-09-01 11:11:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:02,628 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 11:11:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123597849] [2023-09-01 11:11:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123597849] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:11:02,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:11:02,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:11:02,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362671978] [2023-09-01 11:11:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:11:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:11:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:11:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:11:02,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-09-01 11:11:02,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:11:02,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:02,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-09-01 11:11:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:03,995 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-09-01 11:11:03,996 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 11:11:04,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109159 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-09-01 11:11:04,038 INFO L137 encePairwiseOnDemand]: 450/485 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-09-01 11:11:04,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-09-01 11:11:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:11:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:11:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-09-01 11:11:04,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079037800687285 [2023-09-01 11:11:04,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-09-01 11:11:04,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-09-01 11:11:04,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:04,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-09-01 11:11:04,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 11:11:04,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 11:11:04,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 11:11:04,046 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 220 flow. Second operand 3 states and 739 transitions. [2023-09-01 11:11:04,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-09-01 11:11:04,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:11:04,049 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-09-01 11:11:04,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-09-01 11:11:04,050 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-09-01 11:11:04,050 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-09-01 11:11:04,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:11:04,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:04,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:04,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:11:04,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:04,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1867853176, now seen corresponding path program 1 times [2023-09-01 11:11:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320823912] [2023-09-01 11:11:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:04,081 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 11:11:04,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320823912] [2023-09-01 11:11:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320823912] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:11:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884890349] [2023-09-01 11:11:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:04,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:11:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:11:04,084 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 11:11:04,105 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 11:11:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:11:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:11:04,183 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 11:11:04,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:11:04,199 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 11:11:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884890349] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:11:04,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:11:04,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:11:04,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557135406] [2023-09-01 11:11:04,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:11:04,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:11:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:11:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:11:04,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2023-09-01 11:11:04,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 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 11:11:04,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:04,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2023-09-01 11:11:04,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:04,531 INFO L130 PetriNetUnfolder]: 1958/3219 cut-off events. [2023-09-01 11:11:04,531 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-09-01 11:11:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 3219 events. 1958/3219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17560 event pairs, 1837 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 6287. Up to 2999 conditions per place. [2023-09-01 11:11:04,553 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-09-01 11:11:04,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-09-01 11:11:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:11:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:11:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1336 transitions. [2023-09-01 11:11:04,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45910652920962197 [2023-09-01 11:11:04,559 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1336 transitions. [2023-09-01 11:11:04,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1336 transitions. [2023-09-01 11:11:04,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:04,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1336 transitions. [2023-09-01 11:11:04,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.66666666666666) internal successors, (1336), 6 states have internal predecessors, (1336), 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 11:11:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 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 11:11:04,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 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 11:11:04,567 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1336 transitions. [2023-09-01 11:11:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-09-01 11:11:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 208 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:11:04,569 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-09-01 11:11:04,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-09-01 11:11:04,572 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-09-01 11:11:04,572 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-09-01 11:11:04,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.71428571428572) internal successors, (1517), 7 states have internal predecessors, (1517), 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 11:11:04,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:04,573 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:11:04,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:11:04,778 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 11:11:04,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:04,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -845271688, now seen corresponding path program 2 times [2023-09-01 11:11:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:04,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426282965] [2023-09-01 11:11:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:04,847 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 11:11:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426282965] [2023-09-01 11:11:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426282965] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:11:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868066001] [2023-09-01 11:11:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:11:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:11:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:11:04,849 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 11:11:04,874 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 11:11:04,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:11:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:11:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:11:04,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:11:04,959 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 11:11:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:11:05,004 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 11:11:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868066001] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:11:05,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:11:05,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:11:05,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154512670] [2023-09-01 11:11:05,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:11:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:11:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:11:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:11:05,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2023-09-01 11:11:05,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 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 11:11:05,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:05,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2023-09-01 11:11:05,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:05,343 INFO L130 PetriNetUnfolder]: 1958/3225 cut-off events. [2023-09-01 11:11:05,343 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-09-01 11:11:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 3225 events. 1958/3225 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17557 event pairs, 1837 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 6272. Up to 2999 conditions per place. [2023-09-01 11:11:05,358 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-09-01 11:11:05,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-09-01 11:11:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:11:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:11:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2635 transitions. [2023-09-01 11:11:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527491408934708 [2023-09-01 11:11:05,364 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2635 transitions. [2023-09-01 11:11:05,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2635 transitions. [2023-09-01 11:11:05,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:05,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2635 transitions. [2023-09-01 11:11:05,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.58333333333334) internal successors, (2635), 12 states have internal predecessors, (2635), 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 11:11:05,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 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 11:11:05,379 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 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 11:11:05,379 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2635 transitions. [2023-09-01 11:11:05,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-09-01 11:11:05,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:11:05,382 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-09-01 11:11:05,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-09-01 11:11:05,382 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-09-01 11:11:05,383 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-09-01 11:11:05,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.3846153846154) internal successors, (2813), 13 states have internal predecessors, (2813), 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 11:11:05,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:05,384 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:11:05,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 11:11:05,588 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 11:11:05,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:05,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1266609288, now seen corresponding path program 3 times [2023-09-01 11:11:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:05,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802591614] [2023-09-01 11:11:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:05,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:11:05,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:11:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:11:05,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:11:05,664 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:11:05,664 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:11:05,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:11:05,664 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:11:05,665 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:11:05,665 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:11:05,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:11:05,697 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:11:05,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,780 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-09-01 11:11:05,780 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:11:05,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-09-01 11:11:05,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:11:05,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-09-01 11:11:05,869 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-09-01 11:11:05,869 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:11:05,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-09-01 11:11:05,925 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-09-01 11:11:09,563 INFO L134 LiptonReduction]: Checked pairs total: 110294 [2023-09-01 11:11:09,564 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-09-01 11:11:09,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:11:09,566 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;@382f14f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:11:09,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:11:09,577 INFO L130 PetriNetUnfolder]: 62/178 cut-off events. [2023-09-01 11:11:09,577 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:11:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:09,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:09,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 757390343, now seen corresponding path program 1 times [2023-09-01 11:11:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301386990] [2023-09-01 11:11:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:09,621 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 11:11:09,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:09,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301386990] [2023-09-01 11:11:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301386990] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:11:09,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:11:09,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:11:09,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631751088] [2023-09-01 11:11:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:11:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:11:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:11:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:11:09,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 618 [2023-09-01 11:11:09,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 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 11:11:09,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:09,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 618 [2023-09-01 11:11:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:27,295 INFO L130 PetriNetUnfolder]: 199024/283218 cut-off events. [2023-09-01 11:11:27,295 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-09-01 11:11:27,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7666. Compared 2271673 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-09-01 11:11:28,057 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 50 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-09-01 11:11:28,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-09-01 11:11:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:11:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:11:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 936 transitions. [2023-09-01 11:11:28,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048543689320388 [2023-09-01 11:11:28,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 936 transitions. [2023-09-01 11:11:28,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 936 transitions. [2023-09-01 11:11:28,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:28,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 936 transitions. [2023-09-01 11:11:28,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 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 11:11:28,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 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 11:11:28,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 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 11:11:28,068 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 936 transitions. [2023-09-01 11:11:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-09-01 11:11:28,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:11:28,075 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-09-01 11:11:28,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-09-01 11:11:28,076 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-09-01 11:11:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-09-01 11:11:28,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 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 11:11:28,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:28,077 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:28,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:11:28,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:28,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash -494923007, now seen corresponding path program 1 times [2023-09-01 11:11:28,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:28,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943906962] [2023-09-01 11:11:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:28,115 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 11:11:28,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943906962] [2023-09-01 11:11:28,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943906962] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:11:28,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903968052] [2023-09-01 11:11:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:11:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:11:28,118 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 11:11:28,120 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 11:11:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:11:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:11:28,215 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 11:11:28,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:11:28,227 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 11:11:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903968052] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:11:28,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:11:28,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:11:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774155461] [2023-09-01 11:11:28,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:11:28,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:11:28,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:28,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:11:28,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:11:28,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 618 [2023-09-01 11:11:28,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 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 11:11:28,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:28,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 618 [2023-09-01 11:11:28,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:31,499 INFO L130 PetriNetUnfolder]: 38291/55507 cut-off events. [2023-09-01 11:11:31,499 INFO L131 PetriNetUnfolder]: For 1588/1588 co-relation queries the response was YES. [2023-09-01 11:11:31,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107316 conditions, 55507 events. 38291/55507 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388835 event pairs, 36162 based on Foata normal form. 0/45799 useless extension candidates. Maximal degree in co-relation 107302. Up to 50628 conditions per place. [2023-09-01 11:11:31,702 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-09-01 11:11:31,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 285 flow [2023-09-01 11:11:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:11:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:11:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1696 transitions. [2023-09-01 11:11:31,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738942826321466 [2023-09-01 11:11:31,707 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1696 transitions. [2023-09-01 11:11:31,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1696 transitions. [2023-09-01 11:11:31,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:31,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1696 transitions. [2023-09-01 11:11:31,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.6666666666667) internal successors, (1696), 6 states have internal predecessors, (1696), 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 11:11:31,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 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 11:11:31,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 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 11:11:31,729 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1696 transitions. [2023-09-01 11:11:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 285 flow [2023-09-01 11:11:31,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 275 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:11:31,733 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-09-01 11:11:31,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-09-01 11:11:31,734 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-09-01 11:11:31,734 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-09-01 11:11:31,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 274.85714285714283) internal successors, (1924), 7 states have internal predecessors, (1924), 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 11:11:31,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:31,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:31,741 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 11:11:31,941 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 11:11:31,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:31,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1169672839, now seen corresponding path program 2 times [2023-09-01 11:11:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060878549] [2023-09-01 11:11:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:32,028 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 11:11:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060878549] [2023-09-01 11:11:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060878549] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:11:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431332204] [2023-09-01 11:11:32,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:11:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:11:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:11:32,030 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 11:11:32,032 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 11:11:32,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:11:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:11:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:11:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:11:32,146 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 11:11:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:11:32,197 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 11:11:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431332204] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:11:32,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:11:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:11:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566100595] [2023-09-01 11:11:32,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:11:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:11:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:11:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:11:32,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 618 [2023-09-01 11:11:32,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 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 11:11:32,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:32,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 618 [2023-09-01 11:11:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:11:35,644 INFO L130 PetriNetUnfolder]: 38291/55513 cut-off events. [2023-09-01 11:11:35,644 INFO L131 PetriNetUnfolder]: For 724/724 co-relation queries the response was YES. [2023-09-01 11:11:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106984 conditions, 55513 events. 38291/55513 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 388995 event pairs, 36162 based on Foata normal form. 6/45812 useless extension candidates. Maximal degree in co-relation 106924. Up to 50628 conditions per place. [2023-09-01 11:11:35,862 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 50 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-09-01 11:11:35,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 347 flow [2023-09-01 11:11:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:11:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:11:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3343 transitions. [2023-09-01 11:11:35,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450782092772384 [2023-09-01 11:11:35,872 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3343 transitions. [2023-09-01 11:11:35,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3343 transitions. [2023-09-01 11:11:35,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:11:35,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3343 transitions. [2023-09-01 11:11:35,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 278.5833333333333) internal successors, (3343), 12 states have internal predecessors, (3343), 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 11:11:35,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 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 11:11:35,889 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 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 11:11:35,889 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3343 transitions. [2023-09-01 11:11:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 347 flow [2023-09-01 11:11:35,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 333 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:11:35,895 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-09-01 11:11:35,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-09-01 11:11:35,896 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-09-01 11:11:35,896 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-09-01 11:11:35,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 274.46153846153845) internal successors, (3568), 13 states have internal predecessors, (3568), 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 11:11:35,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:35,897 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:35,906 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 11:11:36,103 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 11:11:36,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:36,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2036537415, now seen corresponding path program 3 times [2023-09-01 11:11:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:36,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976212548] [2023-09-01 11:11:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:36,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:11:36,131 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:11:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:11:36,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:11:36,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:11:36,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:11:36,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:11:36,156 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:11:36,156 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:11:36,156 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:11:36,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:11:36,186 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:11:36,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,316 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-09-01 11:11:36,316 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:11:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-09-01 11:11:36,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,340 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:11:36,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-09-01 11:11:36,622 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-09-01 11:11:36,623 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:11:36,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-09-01 11:11:36,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 108488 [2023-09-01 11:11:40,410 INFO L134 LiptonReduction]: Checked pairs total: 188751 [2023-09-01 11:11:40,410 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-09-01 11:11:40,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:11:40,412 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;@382f14f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:11:40,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:11:40,428 INFO L130 PetriNetUnfolder]: 88/256 cut-off events. [2023-09-01 11:11:40,428 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:11:40,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:11:40,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:11:40,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:11:40,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:11:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -460812786, now seen corresponding path program 1 times [2023-09-01 11:11:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:11:40,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187356382] [2023-09-01 11:11:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:11:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:11:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:11:40,454 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 11:11:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:11:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187356382] [2023-09-01 11:11:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187356382] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:11:40,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:11:40,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:11:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413815621] [2023-09-01 11:11:40,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:11:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:11:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:11:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:11:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:11:40,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 749 [2023-09-01 11:11:40,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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 11:11:40,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:11:40,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 749 [2023-09-01 11:11:40,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand