./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 21:01:28,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:01:28,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:01:28,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:01:28,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:01:28,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:01:28,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:01:28,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:01:28,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:01:28,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:01:28,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:01:28,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:01:28,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:01:28,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:01:28,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:01:28,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:01:28,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:01:28,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:01:28,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:01:28,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:01:28,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:01:28,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:01:28,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:01:28,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:01:28,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:01:28,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:01:28,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:01:28,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:01:28,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:01:28,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:01:28,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:01:28,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:01:28,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:01:28,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:01:28,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:01:28,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:01:28,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:01:28,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:01:28,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:01:28,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:01:28,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:01:28,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:01:28,314 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:01:28,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:01:28,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:01:28,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:01:28,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:01:28,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:01:28,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:01:28,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:01:28,317 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:01:28,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:01:28,317 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:01:28,317 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:01:28,318 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:01:28,319 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:01:28,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:01:28,319 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:01:28,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:01:28,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:01:28,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:01:28,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:01:28,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:01:28,321 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:01:28,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:01:28,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:01:28,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:01:28,606 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:01:28,606 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:01:28,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-31 21:01:29,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:01:29,735 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:01:29,735 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-31 21:01:29,747 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e7d040b/c179d7251d2240689e55ea10e7df837e/FLAG00aa17241 [2023-08-31 21:01:29,762 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e7d040b/c179d7251d2240689e55ea10e7df837e [2023-08-31 21:01:29,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:01:29,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:01:29,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:01:29,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:01:29,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:01:29,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:01:29" (1/1) ... [2023-08-31 21:01:29,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b09793a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:29, skipping insertion in model container [2023-08-31 21:01:29,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:01:29" (1/1) ... [2023-08-31 21:01:29,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:01:29,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:01:30,109 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-31 21:01:30,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:01:30,149 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:01:30,180 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_73-funloop_hard_racefree.i[41323,41336] [2023-08-31 21:01:30,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:01:30,255 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:01:30,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30 WrapperNode [2023-08-31 21:01:30,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:01:30,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:01:30,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:01:30,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:01:30,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,297 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 342 [2023-08-31 21:01:30,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:01:30,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:01:30,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:01:30,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:01:30,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,360 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:01:30,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:01:30,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:01:30,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:01:30,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (1/1) ... [2023-08-31 21:01:30,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:01:30,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:01:30,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 21:01:30,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 21:01:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:01:30,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:01:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:01:30,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:01:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:01:30,426 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 21:01:30,558 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:01:30,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:01:30,904 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:01:30,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:01:30,911 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-31 21:01:30,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:01:30 BoogieIcfgContainer [2023-08-31 21:01:30,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:01:30,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:01:30,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:01:30,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:01:30,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:01:29" (1/3) ... [2023-08-31 21:01:30,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526ba10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:01:30, skipping insertion in model container [2023-08-31 21:01:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:01:30" (2/3) ... [2023-08-31 21:01:30,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526ba10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:01:30, skipping insertion in model container [2023-08-31 21:01:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:01:30" (3/3) ... [2023-08-31 21:01:30,918 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-31 21:01:30,923 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:01:30,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:01:30,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-31 21:01:30,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:01:31,051 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:01:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 351 transitions, 710 flow [2023-08-31 21:01:31,240 INFO L130 PetriNetUnfolder]: 73/558 cut-off events. [2023-08-31 21:01:31,240 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 21:01:31,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 558 events. 73/558 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3018 event pairs, 0 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 314. Up to 8 conditions per place. [2023-08-31 21:01:31,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 351 transitions, 710 flow [2023-08-31 21:01:31,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 346 transitions, 697 flow [2023-08-31 21:01:31,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:01:31,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 346 transitions, 697 flow [2023-08-31 21:01:31,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 346 transitions, 697 flow [2023-08-31 21:01:31,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 346 transitions, 697 flow [2023-08-31 21:01:31,332 INFO L130 PetriNetUnfolder]: 72/553 cut-off events. [2023-08-31 21:01:31,333 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:01:31,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 553 events. 72/553 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2945 event pairs, 0 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 314. Up to 8 conditions per place. [2023-08-31 21:01:31,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 43452 [2023-08-31 21:01:33,696 INFO L134 LiptonReduction]: Checked pairs total: 154140 [2023-08-31 21:01:33,696 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-31 21:01:33,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:01:33,709 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;@bcadaf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:01:33,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:01:33,721 INFO L130 PetriNetUnfolder]: 11/48 cut-off events. [2023-08-31 21:01:33,722 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:01:33,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:33,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:01:33,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:33,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:33,727 INFO L85 PathProgramCache]: Analyzing trace with hash 316299992, now seen corresponding path program 1 times [2023-08-31 21:01:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:33,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140367301] [2023-08-31 21:01:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:33,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140367301] [2023-08-31 21:01:33,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140367301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:01:33,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:01:33,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:01:33,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955250005] [2023-08-31 21:01:33,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:01:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:01:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:01:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:01:33,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 542 [2023-08-31 21:01:33,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 190 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:33,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:33,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 542 [2023-08-31 21:01:33,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:34,239 INFO L130 PetriNetUnfolder]: 801/2853 cut-off events. [2023-08-31 21:01:34,239 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:01:34,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4345 conditions, 2853 events. 801/2853 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 22946 event pairs, 666 based on Foata normal form. 342/2932 useless extension candidates. Maximal degree in co-relation 4188. Up to 1486 conditions per place. [2023-08-31 21:01:34,245 INFO L137 encePairwiseOnDemand]: 507/542 looper letters, 25 selfloop transitions, 2 changer transitions 101/159 dead transitions. [2023-08-31 21:01:34,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 159 transitions, 447 flow [2023-08-31 21:01:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:01:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:01:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2023-08-31 21:01:34,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193111931119312 [2023-08-31 21:01:34,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2023-08-31 21:01:34,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2023-08-31 21:01:34,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:34,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2023-08-31 21:01:34,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,270 INFO L175 Difference]: Start difference. First operand has 156 places, 190 transitions, 385 flow. Second operand 3 states and 1007 transitions. [2023-08-31 21:01:34,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 159 transitions, 447 flow [2023-08-31 21:01:34,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 159 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:01:34,274 INFO L231 Difference]: Finished difference. Result has 158 places, 58 transitions, 131 flow [2023-08-31 21:01:34,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=158, PETRI_TRANSITIONS=58} [2023-08-31 21:01:34,278 INFO L281 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2023-08-31 21:01:34,278 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 58 transitions, 131 flow [2023-08-31 21:01:34,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:34,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:01:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:01:34,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:34,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1970950312, now seen corresponding path program 1 times [2023-08-31 21:01:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184156745] [2023-08-31 21:01:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184156745] [2023-08-31 21:01:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184156745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:01:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775478285] [2023-08-31 21:01:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:34,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:01:34,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:01:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 21:01:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:01:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:01:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:01:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775478285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:01:34,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:01:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:01:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010131565] [2023-08-31 21:01:34,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:01:34,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:01:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:01:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:01:34,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 542 [2023-08-31 21:01:34,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 58 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:34,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 542 [2023-08-31 21:01:34,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:34,575 INFO L130 PetriNetUnfolder]: 63/264 cut-off events. [2023-08-31 21:01:34,576 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:01:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 264 events. 63/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 877 event pairs, 54 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 411. Up to 140 conditions per place. [2023-08-31 21:01:34,577 INFO L137 encePairwiseOnDemand]: 539/542 looper letters, 25 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-31 21:01:34,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 203 flow [2023-08-31 21:01:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:01:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:01:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1851 transitions. [2023-08-31 21:01:34,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691881918819188 [2023-08-31 21:01:34,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1851 transitions. [2023-08-31 21:01:34,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1851 transitions. [2023-08-31 21:01:34,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:34,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1851 transitions. [2023-08-31 21:01:34,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 308.5) internal successors, (1851), 6 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,588 INFO L175 Difference]: Start difference. First operand has 158 places, 58 transitions, 131 flow. Second operand 6 states and 1851 transitions. [2023-08-31 21:01:34,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 203 flow [2023-08-31 21:01:34,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 21:01:34,590 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 163 flow [2023-08-31 21:01:34,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 21:01:34,591 INFO L281 CegarLoopForPetriNet]: 156 programPoint places, -89 predicate places. [2023-08-31 21:01:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 163 flow [2023-08-31 21:01:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:01:34,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 21:01:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:34,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:34,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1240379688, now seen corresponding path program 2 times [2023-08-31 21:01:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106684061] [2023-08-31 21:01:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106684061] [2023-08-31 21:01:34,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106684061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:01:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676821115] [2023-08-31 21:01:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:01:34,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:01:34,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:01:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 21:01:34,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:01:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:01:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:01:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:01:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:01:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:01:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676821115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:01:34,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:01:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:01:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134026161] [2023-08-31 21:01:34,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:01:34,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:01:34,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:01:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:01:35,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 542 [2023-08-31 21:01:35,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 163 flow. Second operand has 13 states, 13 states have (on average 304.3076923076923) internal successors, (3956), 13 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:35,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:35,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 542 [2023-08-31 21:01:35,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:35,090 INFO L130 PetriNetUnfolder]: 63/270 cut-off events. [2023-08-31 21:01:35,090 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 21:01:35,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 270 events. 63/270 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 872 event pairs, 54 based on Foata normal form. 6/248 useless extension candidates. Maximal degree in co-relation 402. Up to 140 conditions per place. [2023-08-31 21:01:35,091 INFO L137 encePairwiseOnDemand]: 539/542 looper letters, 25 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-08-31 21:01:35,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 271 flow [2023-08-31 21:01:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:01:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:01:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3678 transitions. [2023-08-31 21:01:35,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654981549815498 [2023-08-31 21:01:35,096 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3678 transitions. [2023-08-31 21:01:35,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3678 transitions. [2023-08-31 21:01:35,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:35,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3678 transitions. [2023-08-31 21:01:35,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 306.5) internal successors, (3678), 12 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:35,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 542.0) internal successors, (7046), 13 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:35,112 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 542.0) internal successors, (7046), 13 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:35,112 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 163 flow. Second operand 12 states and 3678 transitions. [2023-08-31 21:01:35,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 271 flow [2023-08-31 21:01:35,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 257 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:01:35,114 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 233 flow [2023-08-31 21:01:35,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2023-08-31 21:01:35,114 INFO L281 CegarLoopForPetriNet]: 156 programPoint places, -73 predicate places. [2023-08-31 21:01:35,114 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 233 flow [2023-08-31 21:01:35,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 304.3076923076923) internal successors, (3956), 13 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:35,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:35,116 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:01:35,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 21:01:35,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 21:01:35,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:35,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1800600792, now seen corresponding path program 3 times [2023-08-31 21:01:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:35,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077209746] [2023-08-31 21:01:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:01:35,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:01:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:01:35,383 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:01:35,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:01:35,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:01:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:01:35,385 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:01:35,387 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:01:35,387 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:01:35,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:01:35,430 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:01:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,506 INFO L130 PetriNetUnfolder]: 118/899 cut-off events. [2023-08-31 21:01:35,506 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:01:35,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 899 events. 118/899 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5601 event pairs, 0 based on Foata normal form. 0/733 useless extension candidates. Maximal degree in co-relation 560. Up to 12 conditions per place. [2023-08-31 21:01:35,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:01:35,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 455 transitions, 928 flow [2023-08-31 21:01:35,606 INFO L130 PetriNetUnfolder]: 118/899 cut-off events. [2023-08-31 21:01:35,607 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:01:35,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 899 events. 118/899 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5601 event pairs, 0 based on Foata normal form. 0/733 useless extension candidates. Maximal degree in co-relation 560. Up to 12 conditions per place. [2023-08-31 21:01:35,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 109956 [2023-08-31 21:01:38,414 INFO L134 LiptonReduction]: Checked pairs total: 453359 [2023-08-31 21:01:38,414 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-31 21:01:38,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:01:38,416 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;@bcadaf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:01:38,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:01:38,423 INFO L130 PetriNetUnfolder]: 38/169 cut-off events. [2023-08-31 21:01:38,423 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:01:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:38,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:01:38,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:38,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -252112363, now seen corresponding path program 1 times [2023-08-31 21:01:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766676284] [2023-08-31 21:01:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766676284] [2023-08-31 21:01:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766676284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:01:38,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:01:38,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:01:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344362755] [2023-08-31 21:01:38,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:01:38,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:01:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:01:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:01:38,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 707 [2023-08-31 21:01:38,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 257 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:38,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:38,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 707 [2023-08-31 21:01:38,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:42,954 INFO L130 PetriNetUnfolder]: 31138/70970 cut-off events. [2023-08-31 21:01:42,954 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-31 21:01:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115086 conditions, 70970 events. 31138/70970 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 818198 event pairs, 27108 based on Foata normal form. 8929/72530 useless extension candidates. Maximal degree in co-relation 51463. Up to 43993 conditions per place. [2023-08-31 21:01:43,130 INFO L137 encePairwiseOnDemand]: 661/707 looper letters, 45 selfloop transitions, 2 changer transitions 106/215 dead transitions. [2023-08-31 21:01:43,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 215 transitions, 620 flow [2023-08-31 21:01:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:01:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:01:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1309 transitions. [2023-08-31 21:01:43,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171617161716172 [2023-08-31 21:01:43,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1309 transitions. [2023-08-31 21:01:43,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1309 transitions. [2023-08-31 21:01:43,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:43,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1309 transitions. [2023-08-31 21:01:43,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 436.3333333333333) internal successors, (1309), 3 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 707.0) internal successors, (2828), 4 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 707.0) internal successors, (2828), 4 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,139 INFO L175 Difference]: Start difference. First operand has 209 places, 257 transitions, 532 flow. Second operand 3 states and 1309 transitions. [2023-08-31 21:01:43,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 215 transitions, 620 flow [2023-08-31 21:01:43,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 215 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:01:43,142 INFO L231 Difference]: Finished difference. Result has 212 places, 109 transitions, 240 flow [2023-08-31 21:01:43,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=707, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=212, PETRI_TRANSITIONS=109} [2023-08-31 21:01:43,143 INFO L281 CegarLoopForPetriNet]: 209 programPoint places, 3 predicate places. [2023-08-31 21:01:43,143 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 109 transitions, 240 flow [2023-08-31 21:01:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:43,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:01:43,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:01:43,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:43,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1558266869, now seen corresponding path program 1 times [2023-08-31 21:01:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:43,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167393638] [2023-08-31 21:01:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:43,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167393638] [2023-08-31 21:01:43,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167393638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:01:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128691655] [2023-08-31 21:01:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:43,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:01:43,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:01:43,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 21:01:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:43,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:01:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:01:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:43,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:01:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128691655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:01:43,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:01:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:01:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366697275] [2023-08-31 21:01:43,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:01:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:01:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:01:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:01:43,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 707 [2023-08-31 21:01:43,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 109 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 393.7142857142857) internal successors, (2756), 7 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:43,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 707 [2023-08-31 21:01:43,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:43,782 INFO L130 PetriNetUnfolder]: 2757/6754 cut-off events. [2023-08-31 21:01:43,783 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2023-08-31 21:01:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10980 conditions, 6754 events. 2757/6754 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54774 event pairs, 2448 based on Foata normal form. 0/5889 useless extension candidates. Maximal degree in co-relation 10967. Up to 4130 conditions per place. [2023-08-31 21:01:43,806 INFO L137 encePairwiseOnDemand]: 704/707 looper letters, 45 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-08-31 21:01:43,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 352 flow [2023-08-31 21:01:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:01:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:01:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2405 transitions. [2023-08-31 21:01:43,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566949552098067 [2023-08-31 21:01:43,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2405 transitions. [2023-08-31 21:01:43,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2405 transitions. [2023-08-31 21:01:43,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:43,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2405 transitions. [2023-08-31 21:01:43,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 400.8333333333333) internal successors, (2405), 6 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 707.0) internal successors, (4949), 7 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,826 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 707.0) internal successors, (4949), 7 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,826 INFO L175 Difference]: Start difference. First operand has 212 places, 109 transitions, 240 flow. Second operand 6 states and 2405 transitions. [2023-08-31 21:01:43,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 352 flow [2023-08-31 21:01:43,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 112 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 21:01:43,828 INFO L231 Difference]: Finished difference. Result has 118 places, 112 transitions, 270 flow [2023-08-31 21:01:43,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=707, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=118, PETRI_TRANSITIONS=112} [2023-08-31 21:01:43,831 INFO L281 CegarLoopForPetriNet]: 209 programPoint places, -91 predicate places. [2023-08-31 21:01:43,831 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 112 transitions, 270 flow [2023-08-31 21:01:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 393.7142857142857) internal successors, (2756), 7 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:43,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:43,832 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:01:43,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 21:01:44,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:44,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:44,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash 571400085, now seen corresponding path program 2 times [2023-08-31 21:01:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:44,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079715934] [2023-08-31 21:01:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:44,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079715934] [2023-08-31 21:01:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079715934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:01:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032838486] [2023-08-31 21:01:44,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:01:44,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:01:44,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:01:44,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 21:01:44,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:01:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:01:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:01:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:01:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:44,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:01:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:01:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032838486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:01:44,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:01:44,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:01:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363054428] [2023-08-31 21:01:44,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:01:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:01:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:01:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:01:44,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 392 out of 707 [2023-08-31 21:01:44,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 112 transitions, 270 flow. Second operand has 13 states, 13 states have (on average 393.38461538461536) internal successors, (5114), 13 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:44,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:44,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 392 of 707 [2023-08-31 21:01:44,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:01:44,621 INFO L130 PetriNetUnfolder]: 2757/6760 cut-off events. [2023-08-31 21:01:44,621 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-31 21:01:44,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11007 conditions, 6760 events. 2757/6760 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54796 event pairs, 2448 based on Foata normal form. 6/5902 useless extension candidates. Maximal degree in co-relation 10948. Up to 4130 conditions per place. [2023-08-31 21:01:44,642 INFO L137 encePairwiseOnDemand]: 704/707 looper letters, 45 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2023-08-31 21:01:44,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 118 transitions, 418 flow [2023-08-31 21:01:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:01:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:01:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4766 transitions. [2023-08-31 21:01:44,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617633191890617 [2023-08-31 21:01:44,650 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4766 transitions. [2023-08-31 21:01:44,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4766 transitions. [2023-08-31 21:01:44,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:01:44,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4766 transitions. [2023-08-31 21:01:44,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 397.1666666666667) internal successors, (4766), 12 states have internal predecessors, (4766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:44,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 707.0) internal successors, (9191), 13 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:44,665 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 707.0) internal successors, (9191), 13 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:44,665 INFO L175 Difference]: Start difference. First operand has 118 places, 112 transitions, 270 flow. Second operand 12 states and 4766 transitions. [2023-08-31 21:01:44,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 118 transitions, 418 flow [2023-08-31 21:01:44,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 118 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:01:44,667 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 340 flow [2023-08-31 21:01:44,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=707, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=340, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2023-08-31 21:01:44,668 INFO L281 CegarLoopForPetriNet]: 209 programPoint places, -75 predicate places. [2023-08-31 21:01:44,668 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 340 flow [2023-08-31 21:01:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 393.38461538461536) internal successors, (5114), 13 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:44,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:44,669 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:01:44,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 21:01:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:01:44,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:44,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1771279403, now seen corresponding path program 3 times [2023-08-31 21:01:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942448910] [2023-08-31 21:01:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:01:44,898 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:01:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:01:44,917 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:01:44,917 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:01:44,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:01:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:01:44,918 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:01:44,918 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:01:44,918 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:01:44,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:01:44,950 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:01:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,171 INFO L130 PetriNetUnfolder]: 168/1283 cut-off events. [2023-08-31 21:01:45,171 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:01:45,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 1283 events. 168/1283 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8481 event pairs, 1 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 907. Up to 16 conditions per place. [2023-08-31 21:01:45,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:01:45,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 559 transitions, 1148 flow [2023-08-31 21:01:45,368 INFO L130 PetriNetUnfolder]: 168/1283 cut-off events. [2023-08-31 21:01:45,368 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:01:45,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 1283 events. 168/1283 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8481 event pairs, 1 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 907. Up to 16 conditions per place. [2023-08-31 21:01:45,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 197064 [2023-08-31 21:01:48,630 INFO L134 LiptonReduction]: Checked pairs total: 812329 [2023-08-31 21:01:48,631 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-08-31 21:01:48,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:01:48,634 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;@bcadaf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:01:48,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:01:48,650 INFO L130 PetriNetUnfolder]: 63/311 cut-off events. [2023-08-31 21:01:48,650 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:01:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:01:48,651 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:01:48,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:01:48,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:01:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -646475217, now seen corresponding path program 1 times [2023-08-31 21:01:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:01:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070869628] [2023-08-31 21:01:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:01:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:01:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:01:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:01:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:01:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070869628] [2023-08-31 21:01:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070869628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:01:48,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:01:48,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:01:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125222161] [2023-08-31 21:01:48,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:01:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:01:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:01:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:01:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:01:48,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 865 [2023-08-31 21:01:48,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 318 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:01:48,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:01:48,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 865 [2023-08-31 21:01:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand