./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 06:49:46,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:49:46,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:49:46,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:49:46,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:49:46,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:49:46,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:49:46,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:49:46,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:49:46,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:49:46,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:49:46,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:49:46,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:49:46,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:49:46,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:49:46,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:49:46,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:49:46,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:49:46,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:49:46,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:49:46,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:49:46,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:49:46,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:49:46,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:49:46,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:49:46,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:49:46,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:49:46,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:49:46,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:49:46,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:49:46,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:49:46,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:49:46,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:49:46,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:49:46,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:49:46,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:49:46,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:49:46,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:49:46,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:49:46,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:49:46,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:49:46,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:49:46,278 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:49:46,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:49:46,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:49:46,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:49:46,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:49:46,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:49:46,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:49:46,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:49:46,282 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:49:46,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:49:46,283 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:49:46,283 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:49:46,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:49:46,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:49:46,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:49:46,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:49:46,285 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:49:46,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:49:46,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:49:46,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:49:46,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:49:46,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:49:46,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:49:46,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:49:46,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:49:46,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:49:46,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:49:46,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:49:46,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:49:46,288 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:49:46,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:49:46,288 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:49:46,288 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:49:46,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:49:46,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:49:46,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:49:46,618 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:49:46,618 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:49:46,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-09-01 06:49:47,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:49:48,099 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:49:48,102 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-09-01 06:49:48,113 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8530386/543c7357fa4f47488a144533238c6eef/FLAGb0b796271 [2023-09-01 06:49:48,130 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8530386/543c7357fa4f47488a144533238c6eef [2023-09-01 06:49:48,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:49:48,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:49:48,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:49:48,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:49:48,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:49:48,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9c6b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48, skipping insertion in model container [2023-09-01 06:49:48,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:49:48,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:49:48,472 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_51-mutexptr_racefree.i[30176,30189] [2023-09-01 06:49:48,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:49:48,506 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:49:48,540 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_51-mutexptr_racefree.i[30176,30189] [2023-09-01 06:49:48,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:49:48,604 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:49:48,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48 WrapperNode [2023-09-01 06:49:48,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:49:48,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:49:48,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:49:48,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:49:48,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,665 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-09-01 06:49:48,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:49:48,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:49:48,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:49:48,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:49:48,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:49:48,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:49:48,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:49:48,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:49:48,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (1/1) ... [2023-09-01 06:49:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:49:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:49:48,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 06:49:48,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 06:49:48,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:49:48,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:49:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:49:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:49:48,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:49:48,792 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:49:48,792 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:49:48,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:49:48,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:49:48,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:49:48,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:49:48,794 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 06:49:48,990 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:49:48,997 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:49:49,274 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:49:49,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:49:49,281 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-09-01 06:49:49,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:49:49 BoogieIcfgContainer [2023-09-01 06:49:49,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:49:49,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:49:49,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:49:49,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:49:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:49:48" (1/3) ... [2023-09-01 06:49:49,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f759d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:49:49, skipping insertion in model container [2023-09-01 06:49:49,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:49:48" (2/3) ... [2023-09-01 06:49:49,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f759d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:49:49, skipping insertion in model container [2023-09-01 06:49:49,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:49:49" (3/3) ... [2023-09-01 06:49:49,293 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-09-01 06:49:49,301 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:49:49,309 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:49:49,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-09-01 06:49:49,310 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:49:49,400 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:49:49,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 138 transitions, 284 flow [2023-09-01 06:49:49,524 INFO L130 PetriNetUnfolder]: 17/173 cut-off events. [2023-09-01 06:49:49,524 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 06:49:49,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 173 events. 17/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-09-01 06:49:49,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 138 transitions, 284 flow [2023-09-01 06:49:49,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 129 transitions, 263 flow [2023-09-01 06:49:49,546 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:49:49,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 129 transitions, 263 flow [2023-09-01 06:49:49,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 129 transitions, 263 flow [2023-09-01 06:49:49,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 129 transitions, 263 flow [2023-09-01 06:49:49,608 INFO L130 PetriNetUnfolder]: 16/164 cut-off events. [2023-09-01 06:49:49,612 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:49:49,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 164 events. 16/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 387 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-09-01 06:49:49,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 3870 [2023-09-01 06:49:53,298 INFO L134 LiptonReduction]: Checked pairs total: 6476 [2023-09-01 06:49:53,298 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-09-01 06:49:53,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:49:53,327 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:49:53,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:49:53,345 INFO L130 PetriNetUnfolder]: 5/26 cut-off events. [2023-09-01 06:49:53,345 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:49:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:49:53,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 06:49:53,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:49:53,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:49:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1841556009, now seen corresponding path program 1 times [2023-09-01 06:49:53,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:49:53,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582134895] [2023-09-01 06:49:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:49:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:49:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:53,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:49:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:53,513 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:49:53,515 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:49:53,516 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:49:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:49:53,518 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:49:53,520 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:49:53,521 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:49:53,521 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:49:53,548 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:49:53,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,621 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-09-01 06:49:53,621 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:49:53,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-09-01 06:49:53,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,629 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:49:53,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 183 transitions, 384 flow [2023-09-01 06:49:53,679 INFO L130 PetriNetUnfolder]: 31/289 cut-off events. [2023-09-01 06:49:53,679 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:49:53,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 289 events. 31/289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-09-01 06:49:53,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 13072 [2023-09-01 06:49:57,268 INFO L134 LiptonReduction]: Checked pairs total: 26305 [2023-09-01 06:49:57,268 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-09-01 06:49:57,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:49:57,272 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:49:57,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:49:57,278 INFO L130 PetriNetUnfolder]: 14/67 cut-off events. [2023-09-01 06:49:57,278 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:49:57,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:49:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 06:49:57,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:49:57,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:49:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1888445022, now seen corresponding path program 1 times [2023-09-01 06:49:57,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:49:57,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49377358] [2023-09-01 06:49:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:49:57,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:49:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:57,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:49:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:57,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:49:57,342 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:49:57,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:49:57,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 06:49:57,343 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:49:57,344 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:49:57,344 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:49:57,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:49:57,367 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:49:57,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,419 INFO L130 PetriNetUnfolder]: 50/444 cut-off events. [2023-09-01 06:49:57,420 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:49:57,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 444 events. 50/444 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1549 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-09-01 06:49:57,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,429 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:49:57,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 228 transitions, 486 flow [2023-09-01 06:49:57,493 INFO L130 PetriNetUnfolder]: 50/444 cut-off events. [2023-09-01 06:49:57,493 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:49:57,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 444 events. 50/444 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1549 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-09-01 06:49:57,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 25542 [2023-09-01 06:50:01,463 INFO L134 LiptonReduction]: Checked pairs total: 55164 [2023-09-01 06:50:01,463 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-09-01 06:50:01,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:01,466 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:01,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:01,475 INFO L130 PetriNetUnfolder]: 24/110 cut-off events. [2023-09-01 06:50:01,475 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:50:01,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:01,476 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 06:50:01,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:01,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 205842001, now seen corresponding path program 1 times [2023-09-01 06:50:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:01,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143131449] [2023-09-01 06:50:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:01,503 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:01,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:01,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:01,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 06:50:01,527 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:01,528 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:01,528 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:01,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:50:01,553 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:50:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,655 INFO L130 PetriNetUnfolder]: 81/679 cut-off events. [2023-09-01 06:50:01,656 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:50:01,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 81/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2730 event pairs, 6 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 464. Up to 32 conditions per place. [2023-09-01 06:50:01,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,665 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:01,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 273 transitions, 590 flow [2023-09-01 06:50:01,750 INFO L130 PetriNetUnfolder]: 81/679 cut-off events. [2023-09-01 06:50:01,750 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:50:01,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 81/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2730 event pairs, 6 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 464. Up to 32 conditions per place. [2023-09-01 06:50:01,774 INFO L119 LiptonReduction]: Number of co-enabled transitions 41968 [2023-09-01 06:50:05,869 INFO L134 LiptonReduction]: Checked pairs total: 106686 [2023-09-01 06:50:05,870 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-09-01 06:50:05,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:05,873 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:05,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:05,886 INFO L130 PetriNetUnfolder]: 29/154 cut-off events. [2023-09-01 06:50:05,887 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:50:05,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:05,888 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:05,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:05,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash 74810560, now seen corresponding path program 1 times [2023-09-01 06:50:05,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933231664] [2023-09-01 06:50:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:05,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:05,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:05,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:05,996 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:05,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:05,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:50:05,997 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:05,997 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:05,997 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:05,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 06:50:06,025 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 06:50:06,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,206 INFO L130 PetriNetUnfolder]: 140/1078 cut-off events. [2023-09-01 06:50:06,206 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:50:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1078 events. 140/1078 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5146 event pairs, 23 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-09-01 06:50:06,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,234 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:06,234 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 318 transitions, 696 flow [2023-09-01 06:50:06,409 INFO L130 PetriNetUnfolder]: 140/1078 cut-off events. [2023-09-01 06:50:06,410 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:50:06,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1078 events. 140/1078 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5146 event pairs, 23 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-09-01 06:50:06,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 62350 [2023-09-01 06:50:10,613 INFO L134 LiptonReduction]: Checked pairs total: 164094 [2023-09-01 06:50:10,613 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-09-01 06:50:10,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:10,619 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:10,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:10,637 INFO L130 PetriNetUnfolder]: 41/213 cut-off events. [2023-09-01 06:50:10,638 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 06:50:10,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:10,638 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:10,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:10,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1840789858, now seen corresponding path program 1 times [2023-09-01 06:50:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002758680] [2023-09-01 06:50:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:10,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:10,734 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:10,735 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:10,735 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:10,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:50:10,735 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:10,736 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:10,736 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:10,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 06:50:10,774 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 06:50:10,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,172 INFO L130 PetriNetUnfolder]: 263/1813 cut-off events. [2023-09-01 06:50:11,173 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:50:11,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1813 events. 263/1813 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10488 event pairs, 72 based on Foata normal form. 0/1452 useless extension candidates. Maximal degree in co-relation 1177. Up to 192 conditions per place. [2023-09-01 06:50:11,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:11,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 363 transitions, 804 flow [2023-09-01 06:50:11,607 INFO L130 PetriNetUnfolder]: 263/1813 cut-off events. [2023-09-01 06:50:11,608 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:50:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1813 events. 263/1813 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10488 event pairs, 72 based on Foata normal form. 0/1452 useless extension candidates. Maximal degree in co-relation 1177. Up to 192 conditions per place. [2023-09-01 06:50:11,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 86688 [2023-09-01 06:50:16,093 INFO L134 LiptonReduction]: Checked pairs total: 209840 [2023-09-01 06:50:16,094 INFO L136 LiptonReduction]: Total number of compositions: 291 [2023-09-01 06:50:16,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:16,096 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:16,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:16,121 INFO L130 PetriNetUnfolder]: 64/296 cut-off events. [2023-09-01 06:50:16,121 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 06:50:16,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:16,122 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:16,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:16,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -232568762, now seen corresponding path program 1 times [2023-09-01 06:50:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417380512] [2023-09-01 06:50:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:16,165 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:16,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:16,202 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:16,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:16,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 06:50:16,203 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:16,207 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:16,207 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:16,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 06:50:16,243 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 06:50:16,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,057 INFO L130 PetriNetUnfolder]: 530/3236 cut-off events. [2023-09-01 06:50:17,057 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:50:17,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 3236 events. 530/3236 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 22659 event pairs, 201 based on Foata normal form. 0/2602 useless extension candidates. Maximal degree in co-relation 2031. Up to 448 conditions per place. [2023-09-01 06:50:17,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,143 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:17,144 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 408 transitions, 914 flow [2023-09-01 06:50:17,826 INFO L130 PetriNetUnfolder]: 530/3236 cut-off events. [2023-09-01 06:50:17,826 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:50:17,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 3236 events. 530/3236 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 22659 event pairs, 201 based on Foata normal form. 0/2602 useless extension candidates. Maximal degree in co-relation 2031. Up to 448 conditions per place. [2023-09-01 06:50:17,956 INFO L119 LiptonReduction]: Number of co-enabled transitions 114982 [2023-09-01 06:50:22,975 INFO L134 LiptonReduction]: Checked pairs total: 313119 [2023-09-01 06:50:22,975 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-09-01 06:50:22,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:22,977 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:22,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:23,021 INFO L130 PetriNetUnfolder]: 85/395 cut-off events. [2023-09-01 06:50:23,022 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 06:50:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:23,022 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:23,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:23,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1466843345, now seen corresponding path program 1 times [2023-09-01 06:50:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:23,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469873306] [2023-09-01 06:50:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:23,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:23,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:23,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:23,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:23,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 06:50:23,064 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:23,065 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:23,065 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:23,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 06:50:23,101 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 06:50:23,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:24,524 INFO L130 PetriNetUnfolder]: 1117/6067 cut-off events. [2023-09-01 06:50:24,524 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:50:24,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7152 conditions, 6067 events. 1117/6067 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 50618 event pairs, 522 based on Foata normal form. 0/4904 useless extension candidates. Maximal degree in co-relation 3718. Up to 1024 conditions per place. [2023-09-01 06:50:24,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:24,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:24,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:24,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:24,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:24,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 453 transitions, 1026 flow [2023-09-01 06:50:26,193 INFO L130 PetriNetUnfolder]: 1117/6067 cut-off events. [2023-09-01 06:50:26,194 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:50:26,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7152 conditions, 6067 events. 1117/6067 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 50618 event pairs, 522 based on Foata normal form. 0/4904 useless extension candidates. Maximal degree in co-relation 3718. Up to 1024 conditions per place. [2023-09-01 06:50:26,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 147232 [2023-09-01 06:50:31,903 INFO L134 LiptonReduction]: Checked pairs total: 369234 [2023-09-01 06:50:31,904 INFO L136 LiptonReduction]: Total number of compositions: 359 [2023-09-01 06:50:31,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:31,906 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:31,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:31,956 INFO L130 PetriNetUnfolder]: 105/517 cut-off events. [2023-09-01 06:50:31,956 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 06:50:31,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:31,956 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:31,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:31,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 893664314, now seen corresponding path program 1 times [2023-09-01 06:50:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:31,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131703402] [2023-09-01 06:50:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:31,998 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:32,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:32,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:32,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:50:32,020 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:32,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:32,026 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:32,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 06:50:32,069 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 06:50:32,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:35,112 INFO L130 PetriNetUnfolder]: 2408/11778 cut-off events. [2023-09-01 06:50:35,112 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:50:35,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14155 conditions, 11778 events. 2408/11778 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 114176 event pairs, 1291 based on Foata normal form. 0/9574 useless extension candidates. Maximal degree in co-relation 7134. Up to 2304 conditions per place. [2023-09-01 06:50:35,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:35,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:35,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:35,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:35,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 449 places, 498 transitions, 1140 flow [2023-09-01 06:50:38,298 INFO L130 PetriNetUnfolder]: 2408/11778 cut-off events. [2023-09-01 06:50:38,299 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:50:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14155 conditions, 11778 events. 2408/11778 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 114176 event pairs, 1291 based on Foata normal form. 0/9574 useless extension candidates. Maximal degree in co-relation 7134. Up to 2304 conditions per place. [2023-09-01 06:50:38,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 183438 [2023-09-01 06:50:44,568 INFO L134 LiptonReduction]: Checked pairs total: 453712 [2023-09-01 06:50:44,569 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-09-01 06:50:44,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:50:44,571 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:50:44,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:50:44,638 INFO L130 PetriNetUnfolder]: 150/711 cut-off events. [2023-09-01 06:50:44,638 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 06:50:44,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:50:44,638 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:50:44,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:50:44,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:50:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 782410810, now seen corresponding path program 1 times [2023-09-01 06:50:44,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:50:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311686692] [2023-09-01 06:50:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:50:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:50:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:44,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:50:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:50:44,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:50:44,698 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:50:44,698 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:50:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:50:44,699 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:50:44,699 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:50:44,700 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:50:44,700 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 06:50:44,742 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 06:50:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:51,253 INFO L130 PetriNetUnfolder]: 5235/23377 cut-off events. [2023-09-01 06:50:51,253 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:50:51,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28583 conditions, 23377 events. 5235/23377 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 257299 event pairs, 3084 based on Foata normal form. 0/19108 useless extension candidates. Maximal degree in co-relation 14135. Up to 5120 conditions per place. [2023-09-01 06:50:51,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:51,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:51,847 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:50:51,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:51,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:51,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 543 transitions, 1256 flow [2023-09-01 06:50:58,170 INFO L130 PetriNetUnfolder]: 5235/23377 cut-off events. [2023-09-01 06:50:58,171 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:50:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28583 conditions, 23377 events. 5235/23377 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 257299 event pairs, 3084 based on Foata normal form. 0/19108 useless extension candidates. Maximal degree in co-relation 14135. Up to 5120 conditions per place. [2023-09-01 06:50:59,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 223600 [2023-09-01 06:51:05,818 INFO L134 LiptonReduction]: Checked pairs total: 563842 [2023-09-01 06:51:05,818 INFO L136 LiptonReduction]: Total number of compositions: 425 [2023-09-01 06:51:05,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:51:05,820 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:51:05,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:51:05,917 INFO L130 PetriNetUnfolder]: 224/994 cut-off events. [2023-09-01 06:51:05,917 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 06:51:05,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:51:05,918 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:51:05,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:51:05,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:51:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1272929271, now seen corresponding path program 1 times [2023-09-01 06:51:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:51:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974672818] [2023-09-01 06:51:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:51:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:51:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:51:05,954 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:51:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:51:05,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:51:05,978 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:51:05,978 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:51:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 06:51:05,978 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:51:05,979 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:51:05,979 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:51:05,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 06:51:06,020 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 06:51:06,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:20,466 INFO L130 PetriNetUnfolder]: 11390/47008 cut-off events. [2023-09-01 06:51:20,466 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:51:21,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58372 conditions, 47008 events. 11390/47008 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 575300 event pairs, 7181 based on Foata normal form. 0/38626 useless extension candidates. Maximal degree in co-relation 28561. Up to 11264 conditions per place. [2023-09-01 06:51:21,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:22,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:22,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:51:22,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:22,455 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:22,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 529 places, 588 transitions, 1374 flow [2023-09-01 06:51:36,689 INFO L130 PetriNetUnfolder]: 11390/47008 cut-off events. [2023-09-01 06:51:36,689 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:51:37,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58372 conditions, 47008 events. 11390/47008 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 575300 event pairs, 7181 based on Foata normal form. 0/38626 useless extension candidates. Maximal degree in co-relation 28561. Up to 11264 conditions per place. [2023-09-01 06:51:41,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 267718 [2023-09-01 06:51:47,761 INFO L134 LiptonReduction]: Checked pairs total: 761040 [2023-09-01 06:51:47,761 INFO L136 LiptonReduction]: Total number of compositions: 471 [2023-09-01 06:51:47,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:51:47,763 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:51:47,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:51:47,897 INFO L130 PetriNetUnfolder]: 349/1428 cut-off events. [2023-09-01 06:51:47,898 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 06:51:47,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:51:47,898 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:51:47,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:51:47,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:51:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash -139649955, now seen corresponding path program 1 times [2023-09-01 06:51:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:51:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098236685] [2023-09-01 06:51:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:51:47,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:51:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:51:47,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:51:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:51:47,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:51:47,951 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:51:47,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:51:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 06:51:47,952 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:51:47,952 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:51:47,952 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:51:47,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 06:51:48,000 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 06:51:48,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 569 places, 633 transitions, 1494 flow [2023-09-01 06:52:23,516 INFO L130 PetriNetUnfolder]: 24713/95215 cut-off events. [2023-09-01 06:52:23,517 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:52:27,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119906 conditions, 95215 events. 24713/95215 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 1275620 event pairs, 16398 based on Foata normal form. 0/78624 useless extension candidates. Maximal degree in co-relation 58348. Up to 24576 conditions per place. [2023-09-01 06:52:27,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 569 places, 633 transitions, 1494 flow [2023-09-01 06:52:29,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 569 places, 633 transitions, 1494 flow [2023-09-01 06:52:29,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:52:29,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 569 places, 633 transitions, 1494 flow [2023-09-01 06:52:29,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 569 places, 633 transitions, 1494 flow [2023-09-01 06:52:29,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 569 places, 633 transitions, 1494 flow [2023-09-01 06:53:00,647 INFO L130 PetriNetUnfolder]: 24713/95215 cut-off events. [2023-09-01 06:53:00,647 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:53:04,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119906 conditions, 95215 events. 24713/95215 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 1275620 event pairs, 16398 based on Foata normal form. 0/78624 useless extension candidates. Maximal degree in co-relation 58348. Up to 24576 conditions per place. [2023-09-01 06:53:12,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 315792 [2023-09-01 06:53:18,993 INFO L134 LiptonReduction]: Checked pairs total: 802193 [2023-09-01 06:53:18,993 INFO L136 LiptonReduction]: Total number of compositions: 484 [2023-09-01 06:53:18,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:53:18,996 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:53:18,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:53:19,229 INFO L130 PetriNetUnfolder]: 560/2101 cut-off events. [2023-09-01 06:53:19,230 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 06:53:19,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:53:19,230 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:53:19,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:53:19,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:53:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 371564045, now seen corresponding path program 1 times [2023-09-01 06:53:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:53:19,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80366854] [2023-09-01 06:53:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:53:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:53:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:53:19,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:53:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:53:19,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:53:19,278 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:53:19,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:53:19,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:53:19,278 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:53:19,279 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:53:19,279 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:53:19,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 06:53:19,324 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 06:53:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 609 places, 678 transitions, 1616 flow [2023-09-01 06:54:34,112 INFO L130 PetriNetUnfolder]: 53396/193598 cut-off events. [2023-09-01 06:54:34,113 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:54:50,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246977 conditions, 193598 events. 53396/193598 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2834. Compared 2830510 event pairs, 36879 based on Foata normal form. 0/160606 useless extension candidates. Maximal degree in co-relation 119880. Up to 53248 conditions per place. [2023-09-01 06:54:50,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 609 places, 678 transitions, 1616 flow [2023-09-01 06:54:56,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 609 places, 678 transitions, 1616 flow [2023-09-01 06:54:56,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:54:56,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 609 places, 678 transitions, 1616 flow [2023-09-01 06:54:56,115 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 609 places, 678 transitions, 1616 flow [2023-09-01 06:54:56,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 609 places, 678 transitions, 1616 flow [2023-09-01 06:56:08,598 INFO L130 PetriNetUnfolder]: 53396/193598 cut-off events. [2023-09-01 06:56:08,599 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:56:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246977 conditions, 193598 events. 53396/193598 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2834. Compared 2830510 event pairs, 36879 based on Foata normal form. 0/160606 useless extension candidates. Maximal degree in co-relation 119880. Up to 53248 conditions per place. [2023-09-01 06:56:59,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 367822 [2023-09-01 06:57:07,429 INFO L134 LiptonReduction]: Checked pairs total: 936893 [2023-09-01 06:57:07,429 INFO L136 LiptonReduction]: Total number of compositions: 522 [2023-09-01 06:57:07,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:57:07,442 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;@3e5168cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:57:07,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:57:07,888 INFO L130 PetriNetUnfolder]: 913/3145 cut-off events. [2023-09-01 06:57:07,894 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 06:57:07,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:57:07,895 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:57:07,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:57:07,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:57:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1867278190, now seen corresponding path program 1 times [2023-09-01 06:57:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:57:07,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996246892] [2023-09-01 06:57:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:57:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:57:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:07,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:57:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:57:08,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:57:08,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:57:08,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:57:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 06:57:08,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:57:08,050 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:57:08,050 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:57:08,051 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 06:57:08,103 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 06:57:08,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 649 places, 723 transitions, 1740 flow