./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:54:40,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:54:40,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:54:40,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:54:40,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:54:40,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:54:40,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:54:40,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:54:40,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:54:40,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:54:40,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:54:40,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:54:40,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:54:40,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:54:40,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:54:40,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:54:40,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:54:40,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:54:40,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:54:40,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:54:40,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:54:40,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:54:40,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:54:40,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:54:40,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:54:40,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:54:40,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:54:40,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:54:40,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:54:40,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:54:40,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:54:40,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:54:40,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:54:40,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:54:40,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:54:40,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:54:40,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:54:40,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:54:40,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:54:40,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:54:40,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:54:40,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:54:40,522 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:54:40,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:54:40,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:54:40,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:54:40,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:54:40,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:54:40,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:54:40,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:54:40,525 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:54:40,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:54:40,526 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:54:40,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:54:40,528 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:54:40,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:54:40,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:54:40,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:54:40,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:54:40,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:54:40,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:54:40,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:54:40,530 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:54:40,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:54:40,530 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:54:40,530 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:54:40,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:54:40,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:54:40,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:54:40,821 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:54:40,821 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:54:40,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-30 17:54:41,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:54:42,056 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:54:42,056 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-30 17:54:42,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25837c427/1b0b482c229349faa73ae16d3c93735c/FLAG04ff471d8 [2023-08-30 17:54:42,083 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25837c427/1b0b482c229349faa73ae16d3c93735c [2023-08-30 17:54:42,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:54:42,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:54:42,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:54:42,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:54:42,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:54:42,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fda4a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42, skipping insertion in model container [2023-08-30 17:54:42,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:54:42,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:54:42,363 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_42-trylock2_racefree.i[30176,30189] [2023-08-30 17:54:42,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:54:42,397 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:54:42,432 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_42-trylock2_racefree.i[30176,30189] [2023-08-30 17:54:42,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:54:42,499 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:54:42,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42 WrapperNode [2023-08-30 17:54:42,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:54:42,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:54:42,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:54:42,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:54:42,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,543 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2023-08-30 17:54:42,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:54:42,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:54:42,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:54:42,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:54:42,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:54:42,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:54:42,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:54:42,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:54:42,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (1/1) ... [2023-08-30 17:54:42,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:54:42,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:42,604 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) [2023-08-30 17:54:42,611 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 [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:54:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:54:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:54:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:54:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-30 17:54:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:54:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:54:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:54:42,629 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:54:42,708 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:54:42,710 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:54:42,921 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:54:42,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:54:42,926 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-30 17:54:42,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:54:42 BoogieIcfgContainer [2023-08-30 17:54:42,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:54:42,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:54:42,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:54:42,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:54:42,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:54:42" (1/3) ... [2023-08-30 17:54:42,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377e0744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:54:42, skipping insertion in model container [2023-08-30 17:54:42,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:54:42" (2/3) ... [2023-08-30 17:54:42,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377e0744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:54:42, skipping insertion in model container [2023-08-30 17:54:42,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:54:42" (3/3) ... [2023-08-30 17:54:42,933 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-08-30 17:54:42,937 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:54:42,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:54:42,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-30 17:54:42,957 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:54:43,034 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:54:43,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-08-30 17:54:43,191 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2023-08-30 17:54:43,191 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:54:43,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-30 17:54:43,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-08-30 17:54:43,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:43,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:43,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:43,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:43,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:43,260 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2023-08-30 17:54:43,260 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:43,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-30 17:54:43,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-08-30 17:54:46,015 INFO L134 LiptonReduction]: Checked pairs total: 21000 [2023-08-30 17:54:46,015 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 17:54:46,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:46,039 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:46,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:54:46,042 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-08-30 17:54:46,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:46,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:46,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:54:46,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:54:46,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 21768335, now seen corresponding path program 1 times [2023-08-30 17:54:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:46,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773053402] [2023-08-30 17:54:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:46,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:46,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773053402] [2023-08-30 17:54:46,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773053402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:46,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:46,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508480428] [2023-08-30 17:54:46,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:46,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 321 [2023-08-30 17:54:46,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 75 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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) [2023-08-30 17:54:46,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:46,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 321 [2023-08-30 17:54:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:46,498 INFO L130 PetriNetUnfolder]: 399/884 cut-off events. [2023-08-30 17:54:46,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:46,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 884 events. 399/884 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4262 event pairs, 333 based on Foata normal form. 131/872 useless extension candidates. Maximal degree in co-relation 1689. Up to 796 conditions per place. [2023-08-30 17:54:46,502 INFO L137 encePairwiseOnDemand]: 294/321 looper letters, 49 selfloop transitions, 2 changer transitions 8/66 dead transitions. [2023-08-30 17:54:46,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 253 flow [2023-08-30 17:54:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-30 17:54:46,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565939771547248 [2023-08-30 17:54:46,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-30 17:54:46,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-30 17:54:46,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:46,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-30 17:54:46,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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) [2023-08-30 17:54:46,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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) [2023-08-30 17:54:46,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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) [2023-08-30 17:54:46,531 INFO L175 Difference]: Start difference. First operand has 54 places, 75 transitions, 155 flow. Second operand 3 states and 536 transitions. [2023-08-30 17:54:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 253 flow [2023-08-30 17:54:46,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:46,535 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 97 flow [2023-08-30 17:54:46,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-30 17:54:46,539 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-30 17:54:46,539 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 97 flow [2023-08-30 17:54:46,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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) [2023-08-30 17:54:46,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:46,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:54:46,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:54:46,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash -200444206, now seen corresponding path program 1 times [2023-08-30 17:54:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816759246] [2023-08-30 17:54:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816759246] [2023-08-30 17:54:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816759246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119259292] [2023-08-30 17:54:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:46,630 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) [2023-08-30 17:54:46,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:54:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:46,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119259292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:46,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245483397] [2023-08-30 17:54:46,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:46,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:46,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 321 [2023-08-30 17:54:46,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 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) [2023-08-30 17:54:46,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:46,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 321 [2023-08-30 17:54:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:46,876 INFO L130 PetriNetUnfolder]: 30/87 cut-off events. [2023-08-30 17:54:46,876 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 17:54:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 87 events. 30/87 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 14 based on Foata normal form. 16/103 useless extension candidates. Maximal degree in co-relation 193. Up to 62 conditions per place. [2023-08-30 17:54:46,876 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2023-08-30 17:54:46,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 155 flow [2023-08-30 17:54:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:54:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:54:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-30 17:54:46,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48286604361370716 [2023-08-30 17:54:46,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-30 17:54:46,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-30 17:54:46,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:46,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-30 17:54:46,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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) [2023-08-30 17:54:46,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 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) [2023-08-30 17:54:46,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 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) [2023-08-30 17:54:46,887 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 97 flow. Second operand 4 states and 620 transitions. [2023-08-30 17:54:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 155 flow [2023-08-30 17:54:46,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:54:46,903 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-30 17:54:46,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-30 17:54:46,903 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -26 predicate places. [2023-08-30 17:54:46,903 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-30 17:54:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 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) [2023-08-30 17:54:46,906 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:54:46,906 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:54:46,906 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:54:46,906 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:54:46,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 17:54:47,107 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 [2023-08-30 17:54:47,107 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:54:47,109 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:54:47,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-08-30 17:54:47,128 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2023-08-30 17:54:47,129 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:54:47,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-30 17:54:47,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-08-30 17:54:47,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:47,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:47,131 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:47,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:47,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-08-30 17:54:47,145 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2023-08-30 17:54:47,145 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-08-30 17:54:47,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-08-30 17:54:50,006 INFO L134 LiptonReduction]: Checked pairs total: 22732 [2023-08-30 17:54:50,007 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-30 17:54:50,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:54:50,009 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:50,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:50,011 INFO L130 PetriNetUnfolder]: 5/33 cut-off events. [2023-08-30 17:54:50,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:50,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:50,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:54:50,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:54:50,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash -660859190, now seen corresponding path program 1 times [2023-08-30 17:54:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103121092] [2023-08-30 17:54:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:50,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:54:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:50,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:54:50,094 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:54:50,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:54:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:54:50,094 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:54:50,095 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:54:50,095 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:54:50,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:54:50,114 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:54:50,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,167 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-08-30 17:54:50,168 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:50,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-30 17:54:50,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:50,172 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:50,205 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-08-30 17:54:50,205 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-30 17:54:50,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-08-30 17:54:52,680 INFO L134 LiptonReduction]: Checked pairs total: 72714 [2023-08-30 17:54:52,680 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 17:54:52,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:54:52,682 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:52,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:54:52,684 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-08-30 17:54:52,684 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:54:52,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:52,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:54:52,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:54:52,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 40176146, now seen corresponding path program 1 times [2023-08-30 17:54:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631567588] [2023-08-30 17:54:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631567588] [2023-08-30 17:54:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631567588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:54:52,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:54:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:54:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763539960] [2023-08-30 17:54:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:54:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:54:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:52,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:54:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:54:52,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 401 [2023-08-30 17:54:52,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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) [2023-08-30 17:54:52,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:52,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 401 [2023-08-30 17:54:52,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:54,079 INFO L130 PetriNetUnfolder]: 13704/23220 cut-off events. [2023-08-30 17:54:54,080 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 17:54:54,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44433 conditions, 23220 events. 13704/23220 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 172327 event pairs, 12690 based on Foata normal form. 5540/26053 useless extension candidates. Maximal degree in co-relation 37055. Up to 21102 conditions per place. [2023-08-30 17:54:54,243 INFO L137 encePairwiseOnDemand]: 363/401 looper letters, 68 selfloop transitions, 2 changer transitions 11/99 dead transitions. [2023-08-30 17:54:54,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 99 transitions, 374 flow [2023-08-30 17:54:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:54:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:54:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-30 17:54:54,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743973399833749 [2023-08-30 17:54:54,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-30 17:54:54,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-30 17:54:54,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:54,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-30 17:54:54,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2023-08-30 17:54:54,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2023-08-30 17:54:54,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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) [2023-08-30 17:54:54,270 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 256 flow. Second operand 3 states and 691 transitions. [2023-08-30 17:54:54,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 99 transitions, 374 flow [2023-08-30 17:54:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:54:54,274 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 162 flow [2023-08-30 17:54:54,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2023-08-30 17:54:54,276 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 1 predicate places. [2023-08-30 17:54:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 162 flow [2023-08-30 17:54:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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) [2023-08-30 17:54:54,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:54,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:54:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:54:54,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:54:54,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -820951602, now seen corresponding path program 1 times [2023-08-30 17:54:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527181153] [2023-08-30 17:54:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:54,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:54:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527181153] [2023-08-30 17:54:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527181153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:54:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368531486] [2023-08-30 17:54:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:54,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:54,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:54:54,401 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) [2023-08-30 17:54:54,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:54:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:54:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:54:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:54:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:54,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:54:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:54:54,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368531486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:54:54,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:54:54,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:54:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915728197] [2023-08-30 17:54:54,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:54:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:54:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:54:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:54:54,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:54:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 401 [2023-08-30 17:54:54,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 189.28571428571428) internal successors, (1325), 7 states have internal predecessors, (1325), 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) [2023-08-30 17:54:54,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:54:54,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 401 [2023-08-30 17:54:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:54:54,885 INFO L130 PetriNetUnfolder]: 1230/2166 cut-off events. [2023-08-30 17:54:54,885 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-08-30 17:54:54,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 2166 events. 1230/2166 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 11621 event pairs, 238 based on Foata normal form. 272/2430 useless extension candidates. Maximal degree in co-relation 4159. Up to 1472 conditions per place. [2023-08-30 17:54:54,889 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-30 17:54:54,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 378 flow [2023-08-30 17:54:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:54:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:54:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1020 transitions. [2023-08-30 17:54:54,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087281795511222 [2023-08-30 17:54:54,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1020 transitions. [2023-08-30 17:54:54,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1020 transitions. [2023-08-30 17:54:54,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:54:54,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1020 transitions. [2023-08-30 17:54:54,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 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) [2023-08-30 17:54:54,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 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) [2023-08-30 17:54:54,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 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) [2023-08-30 17:54:54,898 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 162 flow. Second operand 5 states and 1020 transitions. [2023-08-30 17:54:54,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 378 flow [2023-08-30 17:54:54,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:54:54,901 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-30 17:54:54,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-30 17:54:54,904 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -25 predicate places. [2023-08-30 17:54:54,904 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-30 17:54:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.28571428571428) internal successors, (1325), 7 states have internal predecessors, (1325), 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) [2023-08-30 17:54:54,905 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:54:54,905 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:54:54,905 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:54:54,905 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:54:54,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 17:54:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:54:55,113 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:54:55,114 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:54:55,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,151 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-08-30 17:54:55,152 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-30 17:54:55,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:55,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-08-30 17:54:55,217 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-08-30 17:54:55,217 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:54:55,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-08-30 17:54:55,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-08-30 17:54:57,692 INFO L134 LiptonReduction]: Checked pairs total: 81872 [2023-08-30 17:54:57,693 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 17:54:57,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:54:57,694 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:54:57,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:54:57,699 INFO L130 PetriNetUnfolder]: 29/120 cut-off events. [2023-08-30 17:54:57,699 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 17:54:57,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:54:57,699 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:54:57,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:54:57,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:54:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1759899425, now seen corresponding path program 1 times [2023-08-30 17:54:57,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:54:57,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154820844] [2023-08-30 17:54:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:54:57,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:54:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:57,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:54:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:54:57,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:54:57,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:54:57,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:54:57,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:54:57,755 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:54:57,756 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:54:57,756 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:54:57,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:54:57,779 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:54:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,823 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-08-30 17:54:57,823 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:57,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-08-30 17:54:57,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,830 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:54:57,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:54:57,871 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-08-30 17:54:57,871 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:54:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-08-30 17:54:57,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 48018 [2023-08-30 17:55:00,483 INFO L134 LiptonReduction]: Checked pairs total: 160626 [2023-08-30 17:55:00,483 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-30 17:55:00,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:55:00,487 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:00,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:55:00,489 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-08-30 17:55:00,489 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:00,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:00,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:55:00,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:00,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 61693138, now seen corresponding path program 1 times [2023-08-30 17:55:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231471997] [2023-08-30 17:55:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:55:00,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:00,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231471997] [2023-08-30 17:55:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231471997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:00,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:00,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:55:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958840433] [2023-08-30 17:55:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:00,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:00,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 482 [2023-08-30 17:55:00,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 154 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2023-08-30 17:55:00,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:00,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 482 [2023-08-30 17:55:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:28,731 INFO L130 PetriNetUnfolder]: 319220/469118 cut-off events. [2023-08-30 17:55:28,732 INFO L131 PetriNetUnfolder]: For 2786/2786 co-relation queries the response was YES. [2023-08-30 17:55:29,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905517 conditions, 469118 events. 319220/469118 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 7451. Compared 4093185 event pairs, 203665 based on Foata normal form. 88045/518970 useless extension candidates. Maximal degree in co-relation 42806. Up to 434261 conditions per place. [2023-08-30 17:55:30,864 INFO L137 encePairwiseOnDemand]: 433/482 looper letters, 84 selfloop transitions, 2 changer transitions 11/123 dead transitions. [2023-08-30 17:55:30,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 123 transitions, 466 flow [2023-08-30 17:55:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:55:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:55:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-30 17:55:30,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816044260027663 [2023-08-30 17:55:30,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-30 17:55:30,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-30 17:55:30,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:30,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-30 17:55:30,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 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) [2023-08-30 17:55:30,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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) [2023-08-30 17:55:30,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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) [2023-08-30 17:55:30,871 INFO L175 Difference]: Start difference. First operand has 111 places, 154 transitions, 338 flow. Second operand 3 states and 841 transitions. [2023-08-30 17:55:30,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 123 transitions, 466 flow [2023-08-30 17:55:30,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 123 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:55:30,879 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 217 flow [2023-08-30 17:55:30,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-08-30 17:55:30,879 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2023-08-30 17:55:30,880 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 217 flow [2023-08-30 17:55:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2023-08-30 17:55:30,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:30,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:55:30,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:55:30,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:30,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:30,881 INFO L85 PathProgramCache]: Analyzing trace with hash -375081470, now seen corresponding path program 1 times [2023-08-30 17:55:30,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:30,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162994158] [2023-08-30 17:55:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:30,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:55:30,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162994158] [2023-08-30 17:55:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162994158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:55:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86310200] [2023-08-30 17:55:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:30,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:55:30,904 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) [2023-08-30 17:55:30,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:55:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:55:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:55:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:55:30,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:55:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:55:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86310200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:55:30,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:55:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:55:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512371564] [2023-08-30 17:55:30,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:55:30,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:55:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:55:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:55:30,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 482 [2023-08-30 17:55:30,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 230.28571428571428) internal successors, (1612), 7 states have internal predecessors, (1612), 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) [2023-08-30 17:55:30,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:30,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 482 [2023-08-30 17:55:30,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:55:33,532 INFO L130 PetriNetUnfolder]: 31732/46541 cut-off events. [2023-08-30 17:55:33,532 INFO L131 PetriNetUnfolder]: For 5112/5112 co-relation queries the response was YES. [2023-08-30 17:55:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96653 conditions, 46541 events. 31732/46541 cut-off events. For 5112/5112 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 322132 event pairs, 224 based on Foata normal form. 4336/50870 useless extension candidates. Maximal degree in co-relation 90400. Up to 31106 conditions per place. [2023-08-30 17:55:33,610 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 0 selfloop transitions, 0 changer transitions 167/167 dead transitions. [2023-08-30 17:55:33,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 167 transitions, 649 flow [2023-08-30 17:55:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:55:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:55:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1516 transitions. [2023-08-30 17:55:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242047026279392 [2023-08-30 17:55:33,613 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1516 transitions. [2023-08-30 17:55:33,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1516 transitions. [2023-08-30 17:55:33,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:55:33,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1516 transitions. [2023-08-30 17:55:33,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 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) [2023-08-30 17:55:33,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 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) [2023-08-30 17:55:33,619 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 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) [2023-08-30 17:55:33,619 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 217 flow. Second operand 6 states and 1516 transitions. [2023-08-30 17:55:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 167 transitions, 649 flow [2023-08-30 17:55:33,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 167 transitions, 645 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:55:33,622 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2023-08-30 17:55:33,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=87, PETRI_TRANSITIONS=0} [2023-08-30 17:55:33,622 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -24 predicate places. [2023-08-30 17:55:33,623 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2023-08-30 17:55:33,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 230.28571428571428) internal successors, (1612), 7 states have internal predecessors, (1612), 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) [2023-08-30 17:55:33,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:55:33,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:55:33,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:55:33,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:55:33,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 17:55:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:55:33,828 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:55:33,828 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:55:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,867 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-08-30 17:55:33,867 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:55:33,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-08-30 17:55:33,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:33,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-08-30 17:55:33,927 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-08-30 17:55:33,928 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:55:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-08-30 17:55:33,942 INFO L119 LiptonReduction]: Number of co-enabled transitions 48018 [2023-08-30 17:55:36,671 INFO L134 LiptonReduction]: Checked pairs total: 160161 [2023-08-30 17:55:36,671 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-30 17:55:36,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:55:36,673 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:36,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:55:36,679 INFO L130 PetriNetUnfolder]: 50/184 cut-off events. [2023-08-30 17:55:36,679 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 17:55:36,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:36,680 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:55:36,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:55:36,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash -5391705, now seen corresponding path program 1 times [2023-08-30 17:55:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874731223] [2023-08-30 17:55:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:36,689 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:55:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:55:36,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:55:36,697 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:55:36,698 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:55:36,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:55:36,698 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:55:36,698 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:55:36,698 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:55:36,698 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:55:36,719 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:55:36,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,786 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-08-30 17:55:36,786 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:55:36,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-08-30 17:55:36,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:55:36,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-08-30 17:55:36,863 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-08-30 17:55:36,864 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:55:36,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-08-30 17:55:36,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 75896 [2023-08-30 17:55:39,763 INFO L134 LiptonReduction]: Checked pairs total: 231887 [2023-08-30 17:55:39,763 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-30 17:55:39,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:55:39,765 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;@7f1ff453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:55:39,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:55:39,766 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 17:55:39,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:55:39,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:55:39,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:55:39,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:55:39,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:55:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 86564223, now seen corresponding path program 1 times [2023-08-30 17:55:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:55:39,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292245866] [2023-08-30 17:55:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:55:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:55:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:55:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:55:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:55:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292245866] [2023-08-30 17:55:39,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292245866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:55:39,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:55:39,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:55:39,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592777025] [2023-08-30 17:55:39,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:55:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:55:39,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:55:39,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:55:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:55:39,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 566 [2023-08-30 17:55:39,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 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) [2023-08-30 17:55:39,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:55:39,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 566 [2023-08-30 17:55:39,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand