./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.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 data races 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-DataRace-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 ! data-race) ) --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 [2023-08-31 21:03:03,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:03:03,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:03:03,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:03:03,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:03:03,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:03:03,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:03:03,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:03:03,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:03:03,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:03:03,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:03:03,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:03:03,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:03:03,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:03:03,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:03:03,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:03:03,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:03:03,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:03:03,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:03:03,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:03:03,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:03:03,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:03:03,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:03:03,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:03:03,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:03:03,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:03:03,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:03:03,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:03:03,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:03:03,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:03:03,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:03:03,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:03:03,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:03:03,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:03:03,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:03:03,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:03:03,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:03:03,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:03:03,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:03:03,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:03:03,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:03:03,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:03:03,174 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:03:03,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:03:03,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:03:03,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:03:03,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:03:03,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:03:03,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:03:03,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:03:03,177 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:03:03,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:03:03,178 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:03:03,179 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:03:03,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:03:03,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:03:03,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:03:03,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:03:03,180 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:03:03,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:03:03,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:03:03,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:03:03,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:03:03,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:03:03,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:03:03,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:03:03,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:03:03,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:03:03,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:03:03,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:03:03,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:03:03,183 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:03:03,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:03:03,183 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:03:03,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:03:03,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:03:03,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:03:03,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:03:03,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:03:03,476 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:03:03,477 INFO L432 ainManager$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 [2023-08-31 21:03:04,699 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:03:04,969 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:03:04,974 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-31 21:03:04,987 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ec687a3/1c30541c665e4c91a33863fcb2ec5970/FLAG762c172d9 [2023-08-31 21:03:04,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ec687a3/1c30541c665e4c91a33863fcb2ec5970 [2023-08-31 21:03:05,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:03:05,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:03:05,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:03:05,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:03:05,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:03:05,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca2572f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05, skipping insertion in model container [2023-08-31 21:03:05,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:03:05,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:03:05,374 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] [2023-08-31 21:03:05,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:03:05,414 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:03:05,454 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] [2023-08-31 21:03:05,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:03:05,541 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:03:05,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05 WrapperNode [2023-08-31 21:03:05,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:03:05,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:03:05,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:03:05,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:03:05,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,627 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 256 [2023-08-31 21:03:05,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:03:05,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:03:05,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:03:05,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:03:05,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:03:05,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:03:05,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:03:05,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:03:05,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (1/1) ... [2023-08-31 21:03:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:03:05,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:05,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 21:03:05,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 21:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:03:05,784 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:03:05,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:03:05,787 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 21:03:05,977 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:03:05,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:03:06,360 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:03:06,370 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:03:06,370 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-31 21:03:06,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:03:06 BoogieIcfgContainer [2023-08-31 21:03:06,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:03:06,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:03:06,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:03:06,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:03:06,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:03:05" (1/3) ... [2023-08-31 21:03:06,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3514ba1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:03:06, skipping insertion in model container [2023-08-31 21:03:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:05" (2/3) ... [2023-08-31 21:03:06,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3514ba1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:03:06, skipping insertion in model container [2023-08-31 21:03:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:03:06" (3/3) ... [2023-08-31 21:03:06,381 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-08-31 21:03:06,388 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:03:06,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:03:06,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 21:03:06,396 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:03:06,517 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:03:06,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 265 transitions, 538 flow [2023-08-31 21:03:06,655 INFO L130 PetriNetUnfolder]: 45/374 cut-off events. [2023-08-31 21:03:06,656 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-31 21:03:06,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 374 events. 45/374 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1491 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-31 21:03:06,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 265 transitions, 538 flow [2023-08-31 21:03:06,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:06,678 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:06,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:06,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:06,757 INFO L130 PetriNetUnfolder]: 44/369 cut-off events. [2023-08-31 21:03:06,757 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:06,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 369 events. 44/369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1419 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-31 21:03:06,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 23920 [2023-08-31 21:03:09,460 INFO L134 LiptonReduction]: Checked pairs total: 82732 [2023-08-31 21:03:09,460 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 21:03:09,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:09,476 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;@659d832c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:09,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:09,481 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-08-31 21:03:09,481 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:09,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:09,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:03:09,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:09,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 679098008, now seen corresponding path program 1 times [2023-08-31 21:03:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727167472] [2023-08-31 21:03:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:09,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:09,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727167472] [2023-08-31 21:03:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727167472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:09,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530767306] [2023-08-31 21:03:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:09,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 424 [2023-08-31 21:03:09,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:09,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:09,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 424 [2023-08-31 21:03:09,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:09,987 INFO L130 PetriNetUnfolder]: 380/1485 cut-off events. [2023-08-31 21:03:09,987 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:09,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 1485 events. 380/1485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10412 event pairs, 340 based on Foata normal form. 141/1487 useless extension candidates. Maximal degree in co-relation 2140. Up to 741 conditions per place. [2023-08-31 21:03:09,992 INFO L137 encePairwiseOnDemand]: 400/424 looper letters, 23 selfloop transitions, 2 changer transitions 53/109 dead transitions. [2023-08-31 21:03:09,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2023-08-31 21:03:10,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5927672955974843 [2023-08-31 21:03:10,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2023-08-31 21:03:10,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2023-08-31 21:03:10,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:10,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2023-08-31 21:03:10,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 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) [2023-08-31 21:03:10,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 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) [2023-08-31 21:03:10,023 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 263 flow. Second operand 3 states and 754 transitions. [2023-08-31 21:03:10,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:10,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 109 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:10,029 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:10,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=111, PETRI_TRANSITIONS=56} [2023-08-31 21:03:10,033 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 2 predicate places. [2023-08-31 21:03:10,033 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:10,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:10,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:03:10,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:10,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:10,035 INFO L85 PathProgramCache]: Analyzing trace with hash -634719318, now seen corresponding path program 1 times [2023-08-31 21:03:10,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:10,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771178619] [2023-08-31 21:03:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:10,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:10,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771178619] [2023-08-31 21:03:10,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771178619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120775684] [2023-08-31 21:03:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:10,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:10,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 21:03:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120775684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:10,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:10,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156394318] [2023-08-31 21:03:10,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:10,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 424 [2023-08-31 21:03:10,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 56 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 230.57142857142858) internal successors, (1614), 7 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:10,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 424 [2023-08-31 21:03:10,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:10,364 INFO L130 PetriNetUnfolder]: 56/254 cut-off events. [2023-08-31 21:03:10,365 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:10,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 254 events. 56/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 881 event pairs, 51 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 391. Up to 129 conditions per place. [2023-08-31 21:03:10,366 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 23 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-31 21:03:10,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1405 transitions. [2023-08-31 21:03:10,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522798742138365 [2023-08-31 21:03:10,370 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1405 transitions. [2023-08-31 21:03:10,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1405 transitions. [2023-08-31 21:03:10,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:10,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1405 transitions. [2023-08-31 21:03:10,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.16666666666666) internal successors, (1405), 6 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,379 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,379 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 127 flow. Second operand 6 states and 1405 transitions. [2023-08-31 21:03:10,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:10,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:10,381 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:10,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-31 21:03:10,382 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -43 predicate places. [2023-08-31 21:03:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:10,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 230.57142857142858) internal successors, (1614), 7 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:10,384 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:10,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:10,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:10,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1833560856, now seen corresponding path program 2 times [2023-08-31 21:03:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:10,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943630537] [2023-08-31 21:03:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943630537] [2023-08-31 21:03:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943630537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:10,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122590332] [2023-08-31 21:03:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:10,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:10,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:10,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 21:03:10,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:10,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122590332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:10,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509454606] [2023-08-31 21:03:10,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:10,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 424 [2023-08-31 21:03:10,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 159 flow. Second operand has 13 states, 13 states have (on average 230.30769230769232) internal successors, (2994), 13 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:10,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:10,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 424 [2023-08-31 21:03:10,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:11,004 INFO L130 PetriNetUnfolder]: 56/260 cut-off events. [2023-08-31 21:03:11,005 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 21:03:11,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 260 events. 56/260 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 881 event pairs, 51 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 382. Up to 129 conditions per place. [2023-08-31 21:03:11,006 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 23 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-31 21:03:11,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2788 transitions. [2023-08-31 21:03:11,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479559748427673 [2023-08-31 21:03:11,012 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2788 transitions. [2023-08-31 21:03:11,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2788 transitions. [2023-08-31 21:03:11,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:11,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2788 transitions. [2023-08-31 21:03:11,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.33333333333334) internal successors, (2788), 12 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:11,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:11,029 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:11,030 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 159 flow. Second operand 12 states and 2788 transitions. [2023-08-31 21:03:11,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:11,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 249 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:11,033 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:11,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=229, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-08-31 21:03:11,034 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-31 21:03:11,034 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 230.30769230769232) internal successors, (2994), 13 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:11,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:11,035 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:11,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:11,240 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 [2023-08-31 21:03:11,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:11,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 815579608, now seen corresponding path program 3 times [2023-08-31 21:03:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:11,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346554023] [2023-08-31 21:03:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:11,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:11,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:11,339 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:11,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:11,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:03:11,341 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:11,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:11,343 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:11,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:03:11,398 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:03:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,503 INFO L130 PetriNetUnfolder]: 75/619 cut-off events. [2023-08-31 21:03:11,503 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 21:03:11,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 75/619 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3067 event pairs, 0 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 376. Up to 12 conditions per place. [2023-08-31 21:03:11,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:11,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:11,614 INFO L130 PetriNetUnfolder]: 75/619 cut-off events. [2023-08-31 21:03:11,614 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 21:03:11,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 75/619 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3067 event pairs, 0 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 376. Up to 12 conditions per place. [2023-08-31 21:03:11,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 71760 [2023-08-31 21:03:15,053 INFO L134 LiptonReduction]: Checked pairs total: 253106 [2023-08-31 21:03:15,055 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-31 21:03:15,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:15,063 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;@659d832c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:15,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:15,071 INFO L130 PetriNetUnfolder]: 21/113 cut-off events. [2023-08-31 21:03:15,074 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:03:15,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:15,074 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:15,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:15,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 56253825, now seen corresponding path program 1 times [2023-08-31 21:03:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273462543] [2023-08-31 21:03:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:15,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:15,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273462543] [2023-08-31 21:03:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273462543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:15,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843182256] [2023-08-31 21:03:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:15,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 597 [2023-08-31 21:03:15,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:15,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:15,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 597 [2023-08-31 21:03:15,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:18,462 INFO L130 PetriNetUnfolder]: 14691/34824 cut-off events. [2023-08-31 21:03:18,462 INFO L131 PetriNetUnfolder]: For 206/254 co-relation queries the response was YES. [2023-08-31 21:03:18,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56201 conditions, 34824 events. 14691/34824 cut-off events. For 206/254 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 375817 event pairs, 13600 based on Foata normal form. 4205/35780 useless extension candidates. Maximal degree in co-relation 20590. Up to 21259 conditions per place. [2023-08-31 21:03:18,580 INFO L137 encePairwiseOnDemand]: 563/597 looper letters, 41 selfloop transitions, 2 changer transitions 58/163 dead transitions. [2023-08-31 21:03:18,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1059 transitions. [2023-08-31 21:03:18,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912897822445561 [2023-08-31 21:03:18,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1059 transitions. [2023-08-31 21:03:18,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1059 transitions. [2023-08-31 21:03:18,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:18,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1059 transitions. [2023-08-31 21:03:18,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:18,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:18,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:18,591 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 404 flow. Second operand 3 states and 1059 transitions. [2023-08-31 21:03:18,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 163 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:18,598 INFO L231 Difference]: Finished difference. Result has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:18,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=164, PETRI_TRANSITIONS=105} [2023-08-31 21:03:18,599 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2023-08-31 21:03:18,600 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:18,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:18,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:18,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:03:18,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1039024662, now seen corresponding path program 1 times [2023-08-31 21:03:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991827412] [2023-08-31 21:03:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:18,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991827412] [2023-08-31 21:03:18,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991827412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919213377] [2023-08-31 21:03:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:18,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:18,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 21:03:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:18,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919213377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:18,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:18,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:18,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302521037] [2023-08-31 21:03:18,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:18,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 597 [2023-08-31 21:03:18,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 105 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 321.7142857142857) internal successors, (2252), 7 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:18,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:18,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 597 [2023-08-31 21:03:18,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:19,324 INFO L130 PetriNetUnfolder]: 2338/5891 cut-off events. [2023-08-31 21:03:19,324 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-31 21:03:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 5891 events. 2338/5891 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 48254 event pairs, 2193 based on Foata normal form. 0/5246 useless extension candidates. Maximal degree in co-relation 9538. Up to 3567 conditions per place. [2023-08-31 21:03:19,349 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 41 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-31 21:03:19,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1969 transitions. [2023-08-31 21:03:19,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496929089893914 [2023-08-31 21:03:19,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1969 transitions. [2023-08-31 21:03:19,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1969 transitions. [2023-08-31 21:03:19,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:19,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1969 transitions. [2023-08-31 21:03:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.1666666666667) internal successors, (1969), 6 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:19,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:19,367 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:19,367 INFO L175 Difference]: Start difference. First operand has 164 places, 105 transitions, 232 flow. Second operand 6 states and 1969 transitions. [2023-08-31 21:03:19,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:19,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 108 transitions, 330 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:19,370 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:19,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-31 21:03:19,371 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -45 predicate places. [2023-08-31 21:03:19,371 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:19,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 321.7142857142857) internal successors, (2252), 7 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:19,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:19,373 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:19,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 21:03:19,577 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 [2023-08-31 21:03:19,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:19,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1503416383, now seen corresponding path program 2 times [2023-08-31 21:03:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:19,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411128731] [2023-08-31 21:03:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:19,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:19,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411128731] [2023-08-31 21:03:19,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411128731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237637837] [2023-08-31 21:03:19,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:19,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:19,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 21:03:19,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:19,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237637837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:19,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105494524] [2023-08-31 21:03:19,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:19,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 597 [2023-08-31 21:03:19,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 262 flow. Second operand has 13 states, 13 states have (on average 321.38461538461536) internal successors, (4178), 13 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:19,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:19,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 597 [2023-08-31 21:03:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:20,344 INFO L130 PetriNetUnfolder]: 2338/5897 cut-off events. [2023-08-31 21:03:20,345 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-31 21:03:20,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9578 conditions, 5897 events. 2338/5897 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 48264 event pairs, 2193 based on Foata normal form. 6/5259 useless extension candidates. Maximal degree in co-relation 9519. Up to 3567 conditions per place. [2023-08-31 21:03:20,368 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 41 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-08-31 21:03:20,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3898 transitions. [2023-08-31 21:03:20,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441094360692351 [2023-08-31 21:03:20,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3898 transitions. [2023-08-31 21:03:20,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3898 transitions. [2023-08-31 21:03:20,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:20,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3898 transitions. [2023-08-31 21:03:20,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 324.8333333333333) internal successors, (3898), 12 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:20,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 597.0) internal successors, (7761), 13 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:20,408 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 597.0) internal successors, (7761), 13 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:20,409 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 262 flow. Second operand 12 states and 3898 transitions. [2023-08-31 21:03:20,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 114 transitions, 388 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:20,412 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:20,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2023-08-31 21:03:20,414 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -29 predicate places. [2023-08-31 21:03:20,415 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 321.38461538461536) internal successors, (4178), 13 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:20,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:20,418 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:20,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:20,625 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 [2023-08-31 21:03:20,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:20,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1360449313, now seen corresponding path program 3 times [2023-08-31 21:03:20,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304627585] [2023-08-31 21:03:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:20,648 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:20,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:20,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:20,674 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:20,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:03:20,675 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:20,675 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:20,676 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:20,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:03:20,722 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:03:20,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:20,858 INFO L130 PetriNetUnfolder]: 110/907 cut-off events. [2023-08-31 21:03:20,858 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 21:03:20,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 907 events. 110/907 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4958 event pairs, 1 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-31 21:03:20,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:20,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:20,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:20,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:20,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:20,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:21,022 INFO L130 PetriNetUnfolder]: 110/907 cut-off events. [2023-08-31 21:03:21,022 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 21:03:21,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 907 events. 110/907 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4958 event pairs, 1 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-31 21:03:21,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 141024 [2023-08-31 21:03:24,960 INFO L134 LiptonReduction]: Checked pairs total: 569520 [2023-08-31 21:03:24,960 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-31 21:03:24,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:24,963 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;@659d832c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:24,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:24,980 INFO L130 PetriNetUnfolder]: 35/209 cut-off events. [2023-08-31 21:03:24,981 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:03:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:24,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:24,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2101503650, now seen corresponding path program 1 times [2023-08-31 21:03:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:24,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952670911] [2023-08-31 21:03:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:03:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952670911] [2023-08-31 21:03:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952670911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532814479] [2023-08-31 21:03:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:25,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 412 out of 771 [2023-08-31 21:03:25,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 252 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:25,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:25,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 412 of 771 [2023-08-31 21:03:25,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:27,564 INFO L130 PetriNetUnfolder]: 403445/757641 cut-off events. [2023-08-31 21:04:27,565 INFO L131 PetriNetUnfolder]: For 5874/7267 co-relation queries the response was YES. [2023-08-31 21:04:29,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276847 conditions, 757641 events. 403445/757641 cut-off events. For 5874/7267 co-relation queries the response was YES. Maximal size of possible extension queue 15346. Compared 9853132 event pairs, 377214 based on Foata normal form. 106216/794626 useless extension candidates. Maximal degree in co-relation 226808. Up to 516526 conditions per place. [2023-08-31 21:04:30,690 INFO L137 encePairwiseOnDemand]: 727/771 looper letters, 59 selfloop transitions, 2 changer transitions 59/212 dead transitions. [2023-08-31 21:04:30,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:04:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:04:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1361 transitions. [2023-08-31 21:04:30,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884133160397752 [2023-08-31 21:04:30,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1361 transitions. [2023-08-31 21:04:30,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1361 transitions. [2023-08-31 21:04:30,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:30,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1361 transitions. [2023-08-31 21:04:30,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 453.6666666666667) internal successors, (1361), 3 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:30,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:30,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:30,701 INFO L175 Difference]: Start difference. First operand has 210 places, 252 transitions, 534 flow. Second operand 3 states and 1361 transitions. [2023-08-31 21:04:30,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:30,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 212 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:04:30,708 INFO L231 Difference]: Finished difference. Result has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:30,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=213, PETRI_TRANSITIONS=153} [2023-08-31 21:04:30,710 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, 3 predicate places. [2023-08-31 21:04:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:30,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:30,711 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:30,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:04:30,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:30,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1243872177, now seen corresponding path program 1 times [2023-08-31 21:04:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:30,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337662874] [2023-08-31 21:04:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:30,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:30,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:30,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337662874] [2023-08-31 21:04:30,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337662874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:30,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675079535] [2023-08-31 21:04:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:30,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:30,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:30,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:04:30,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 21:04:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:04:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:30,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675079535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:30,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:30,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:04:30,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673508224] [2023-08-31 21:04:30,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:30,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:04:30,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:04:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:04:30,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 411 out of 771 [2023-08-31 21:04:30,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 153 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:30,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:30,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 411 of 771 [2023-08-31 21:04:30,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:39,535 INFO L130 PetriNetUnfolder]: 66602/129303 cut-off events. [2023-08-31 21:04:39,535 INFO L131 PetriNetUnfolder]: For 2212/2212 co-relation queries the response was YES. [2023-08-31 21:04:39,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218396 conditions, 129303 events. 66602/129303 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 2866. Compared 1427018 event pairs, 62781 based on Foata normal form. 0/115096 useless extension candidates. Maximal degree in co-relation 218382. Up to 87483 conditions per place. [2023-08-31 21:04:40,314 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 59 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-08-31 21:04:40,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:04:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:04:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2533 transitions. [2023-08-31 21:04:40,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475572849113706 [2023-08-31 21:04:40,319 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2533 transitions. [2023-08-31 21:04:40,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2533 transitions. [2023-08-31 21:04:40,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:40,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2533 transitions. [2023-08-31 21:04:40,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 422.1666666666667) internal successors, (2533), 6 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:40,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 771.0) internal successors, (5397), 7 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:40,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 771.0) internal successors, (5397), 7 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:40,330 INFO L175 Difference]: Start difference. First operand has 213 places, 153 transitions, 337 flow. Second operand 6 states and 2533 transitions. [2023-08-31 21:04:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:40,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 156 transitions, 467 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 21:04:40,334 INFO L231 Difference]: Finished difference. Result has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:40,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2023-08-31 21:04:40,335 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -45 predicate places. [2023-08-31 21:04:40,335 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:40,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:40,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:40,337 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:40,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 21:04:40,545 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 [2023-08-31 21:04:40,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:40,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1938207330, now seen corresponding path program 2 times [2023-08-31 21:04:40,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:40,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396404675] [2023-08-31 21:04:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:40,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396404675] [2023-08-31 21:04:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396404675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752444623] [2023-08-31 21:04:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:04:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:40,624 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) [2023-08-31 21:04:40,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 21:04:40,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:04:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:04:40,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:04:40,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:40,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752444623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:40,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:40,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:04:40,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184381625] [2023-08-31 21:04:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:40,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:04:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:04:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:04:40,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 411 out of 771 [2023-08-31 21:04:40,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 412.46153846153845) internal successors, (5362), 13 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:40,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:40,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 411 of 771 [2023-08-31 21:04:40,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:50,432 INFO L130 PetriNetUnfolder]: 66602/129309 cut-off events. [2023-08-31 21:04:50,433 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2023-08-31 21:04:50,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217949 conditions, 129309 events. 66602/129309 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 2866. Compared 1426650 event pairs, 62781 based on Foata normal form. 6/115109 useless extension candidates. Maximal degree in co-relation 217889. Up to 87483 conditions per place. [2023-08-31 21:04:51,047 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 59 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2023-08-31 21:04:51,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:04:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:04:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5008 transitions. [2023-08-31 21:04:51,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412883700821444 [2023-08-31 21:04:51,058 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5008 transitions. [2023-08-31 21:04:51,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5008 transitions. [2023-08-31 21:04:51,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:51,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5008 transitions. [2023-08-31 21:04:51,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 417.3333333333333) internal successors, (5008), 12 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:51,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 771.0) internal successors, (10023), 13 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:51,081 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 771.0) internal successors, (10023), 13 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:51,082 INFO L175 Difference]: Start difference. First operand has 165 places, 156 transitions, 363 flow. Second operand 12 states and 5008 transitions. [2023-08-31 21:04:51,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 162 transitions, 525 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:04:51,085 INFO L231 Difference]: Finished difference. Result has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:51,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=433, PETRI_PLACES=181, PETRI_TRANSITIONS=162} [2023-08-31 21:04:51,086 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -29 predicate places. [2023-08-31 21:04:51,086 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 412.46153846153845) internal successors, (5362), 13 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:51,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 21:04:51,300 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 [2023-08-31 21:04:51,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:51,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 484319230, now seen corresponding path program 3 times [2023-08-31 21:04:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612199554] [2023-08-31 21:04:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:51,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:51,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:51,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:51,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:04:51,345 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:04:51,346 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:51,346 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:51,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:04:51,393 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:04:51,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:51,827 INFO L130 PetriNetUnfolder]: 157/1283 cut-off events. [2023-08-31 21:04:51,828 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 21:04:51,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 1283 events. 157/1283 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7533 event pairs, 6 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 927. Up to 32 conditions per place. [2023-08-31 21:04:51,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:51,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:51,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:51,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:51,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:51,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:04:52,027 INFO L130 PetriNetUnfolder]: 157/1283 cut-off events. [2023-08-31 21:04:52,028 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 21:04:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 1283 events. 157/1283 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7533 event pairs, 6 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 927. Up to 32 conditions per place. [2023-08-31 21:04:52,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 232544 [2023-08-31 21:04:56,430 INFO L134 LiptonReduction]: Checked pairs total: 934670 [2023-08-31 21:04:56,430 INFO L136 LiptonReduction]: Total number of compositions: 349 [2023-08-31 21:04:56,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:56,432 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;@659d832c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:56,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:56,451 INFO L130 PetriNetUnfolder]: 57/344 cut-off events. [2023-08-31 21:04:56,451 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:56,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:56,451 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:56,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:56,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1769046141, now seen corresponding path program 1 times [2023-08-31 21:04:56,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:56,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151871233] [2023-08-31 21:04:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 21:04:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151871233] [2023-08-31 21:04:56,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151871233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:04:56,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:04:56,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:04:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502932141] [2023-08-31 21:04:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:04:56,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:04:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:04:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:04:56,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 932 [2023-08-31 21:04:56,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 314 transitions, 672 flow. Second operand has 3 states, 3 states have (on average 505.6666666666667) internal successors, (1517), 3 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) [2023-08-31 21:04:56,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:56,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 932 [2023-08-31 21:04:56,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand