./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.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_24-sound_lock_racing.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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --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 17:51:43,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:51:43,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:51:43,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:51:43,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:51:43,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:51:43,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:51:43,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:51:43,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:51:43,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:51:43,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:51:43,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:51:44,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:51:44,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:51:44,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:51:44,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:51:44,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:51:44,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:51:44,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:51:44,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:51:44,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:51:44,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:51:44,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:51:44,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:51:44,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:51:44,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:51:44,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:51:44,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:51:44,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:51:44,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:51:44,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:51:44,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:51:44,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:51:44,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:51:44,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:51:44,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:51:44,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:51:44,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:51:44,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:51:44,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:51:44,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:51:44,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:51:44,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:51:44,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:51:44,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:51:44,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:51:44,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:51:44,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:51:44,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:51:44,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:51:44,068 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:51:44,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:51:44,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:51:44,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:51:44,071 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:51:44,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:51:44,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:51:44,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:51:44,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:51:44,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:51:44,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:51:44,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:51:44,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:51:44,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:51:44,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:51:44,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:51:44,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:51:44,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:51:44,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:51:44,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:51:44,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:51:44,074 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:51:44,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:51:44,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:51:44,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:51:44,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:51:44,407 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:51:44,407 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:51:44,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-30 17:51:45,592 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:51:45,792 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:51:45,799 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-30 17:51:45,812 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a1776e3/242596d320d94b439916b139486eb064/FLAGba77d1a0b [2023-08-30 17:51:45,824 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a1776e3/242596d320d94b439916b139486eb064 [2023-08-30 17:51:45,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:51:45,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:51:45,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:51:45,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:51:45,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:51:45,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:51:45" (1/1) ... [2023-08-30 17:51:45,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc9f2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:45, skipping insertion in model container [2023-08-30 17:51:45,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:51:45" (1/1) ... [2023-08-30 17:51:45,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:51:45,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:51:46,115 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_24-sound_lock_racing.i[30176,30189] [2023-08-30 17:51:46,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:51:46,159 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:51:46,199 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_24-sound_lock_racing.i[30176,30189] [2023-08-30 17:51:46,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:51:46,271 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:51:46,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46 WrapperNode [2023-08-30 17:51:46,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:51:46,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:51:46,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:51:46,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:51:46,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,336 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-30 17:51:46,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:51:46,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:51:46,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:51:46,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:51:46,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:51:46,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:51:46,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:51:46,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:51:46,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (1/1) ... [2023-08-30 17:51:46,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:51:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:51:46,426 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 17:51:46,438 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 17:51:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:51:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:51:46,465 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:51:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:51:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:51:46,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:51:46,467 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 17:51:46,639 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:51:46,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:51:46,885 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:51:46,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:51:46,893 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:51:46,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:51:46 BoogieIcfgContainer [2023-08-30 17:51:46,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:51:46,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:51:46,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:51:46,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:51:46,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:51:45" (1/3) ... [2023-08-30 17:51:46,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d80f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:51:46, skipping insertion in model container [2023-08-30 17:51:46,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:51:46" (2/3) ... [2023-08-30 17:51:46,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d80f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:51:46, skipping insertion in model container [2023-08-30 17:51:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:51:46" (3/3) ... [2023-08-30 17:51:46,906 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-08-30 17:51:46,913 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:51:46,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:51:46,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:51:46,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:51:47,002 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:51:47,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-08-30 17:51:47,126 INFO L130 PetriNetUnfolder]: 18/147 cut-off events. [2023-08-30 17:51:47,127 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:51:47,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 17:51:47,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-08-30 17:51:47,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:47,147 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:51:47,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:47,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:47,229 INFO L130 PetriNetUnfolder]: 17/142 cut-off events. [2023-08-30 17:51:47,229 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:47,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 17:51:47,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-30 17:51:50,975 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-08-30 17:51:50,975 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-30 17:51:50,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:51:50,993 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:51:50,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:51:50,998 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-08-30 17:51:50,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:50,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:51:50,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:51:51,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:51:51,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:51:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash 13523618, now seen corresponding path program 1 times [2023-08-30 17:51:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:51:51,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712808390] [2023-08-30 17:51:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:51:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:51:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:51:51,304 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 17:51:51,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:51:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712808390] [2023-08-30 17:51:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712808390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:51:51,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:51:51,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:51:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902914303] [2023-08-30 17:51:51,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:51:51,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:51:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:51:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:51:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:51:51,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-08-30 17:51:51,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 17:51:51,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:51:51,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-08-30 17:51:51,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:51:51,438 INFO L130 PetriNetUnfolder]: 69/171 cut-off events. [2023-08-30 17:51:51,440 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:51,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-08-30 17:51:51,442 INFO L137 encePairwiseOnDemand]: 197/210 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-30 17:51:51,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 117 flow [2023-08-30 17:51:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:51:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:51:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-30 17:51:51,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-08-30 17:51:51,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-30 17:51:51,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-30 17:51:51,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:51:51,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-30 17:51:51,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 17:51:51,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 17:51:51,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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 17:51:51,484 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 333 transitions. [2023-08-30 17:51:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 117 flow [2023-08-30 17:51:51,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:51:51,488 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 43 flow [2023-08-30 17:51:51,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-08-30 17:51:51,493 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-30 17:51:51,494 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 43 flow [2023-08-30 17:51:51,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 17:51:51,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:51:51,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:51:51,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:51:51,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:51:51,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:51:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1336112677, now seen corresponding path program 1 times [2023-08-30 17:51:51,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:51:51,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648242479] [2023-08-30 17:51:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:51:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:51:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:51:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:51:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:51:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648242479] [2023-08-30 17:51:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648242479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:51:51,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:51:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 17:51:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943924139] [2023-08-30 17:51:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:51:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 17:51:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:51:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 17:51:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 17:51:51,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 210 [2023-08-30 17:51:51,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 43 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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 17:51:51,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:51:51,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 210 [2023-08-30 17:51:51,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:51:51,794 INFO L130 PetriNetUnfolder]: 27/79 cut-off events. [2023-08-30 17:51:51,794 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:51,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 79 events. 27/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 12 based on Foata normal form. 7/76 useless extension candidates. Maximal degree in co-relation 155. Up to 40 conditions per place. [2023-08-30 17:51:51,795 INFO L137 encePairwiseOnDemand]: 204/210 looper letters, 12 selfloop transitions, 6 changer transitions 2/21 dead transitions. [2023-08-30 17:51:51,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 93 flow [2023-08-30 17:51:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:51:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:51:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-08-30 17:51:51,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595238095238094 [2023-08-30 17:51:51,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-08-30 17:51:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-08-30 17:51:51,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:51:51,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-08-30 17:51:51,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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 17:51:51,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 17:51:51,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 17:51:51,802 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 43 flow. Second operand 4 states and 383 transitions. [2023-08-30 17:51:51,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 93 flow [2023-08-30 17:51:51,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:51:51,803 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 51 flow [2023-08-30 17:51:51,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=51, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-30 17:51:51,804 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-30 17:51:51,804 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 51 flow [2023-08-30 17:51:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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 17:51:51,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:51:51,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:51:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 17:51:51,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:51:51,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:51:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash -839269820, now seen corresponding path program 1 times [2023-08-30 17:51:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:51:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358185019] [2023-08-30 17:51:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:51:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:51:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:51:51,864 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 17:51:51,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:51:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358185019] [2023-08-30 17:51:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358185019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:51:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395567613] [2023-08-30 17:51:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:51:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:51:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:51:51,873 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 17:51:51,886 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 17:51:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:51:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:51:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:51:52,079 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 17:51:52,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:51:52,130 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 17:51:52,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395567613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:51:52,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:51:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:51:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249918342] [2023-08-30 17:51:52,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:51:52,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:51:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:51:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:51:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:51:52,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 210 [2023-08-30 17:51:52,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 51 flow. Second operand has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 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 17:51:52,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:51:52,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 210 [2023-08-30 17:51:52,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:51:52,185 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-30 17:51:52,185 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 17:51:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 46 events. 16/46 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 100. Up to 34 conditions per place. [2023-08-30 17:51:52,185 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 17:51:52,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 110 flow [2023-08-30 17:51:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:51:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:51:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2023-08-30 17:51:52,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797619047619048 [2023-08-30 17:51:52,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 403 transitions. [2023-08-30 17:51:52,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 403 transitions. [2023-08-30 17:51:52,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:51:52,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 403 transitions. [2023-08-30 17:51:52,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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 17:51:52,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 17:51:52,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 17:51:52,193 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 51 flow. Second operand 4 states and 403 transitions. [2023-08-30 17:51:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 110 flow [2023-08-30 17:51:52,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 17:51:52,194 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-30 17:51:52,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-30 17:51:52,195 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-30 17:51:52,196 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-30 17:51:52,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 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 17:51:52,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:51:52,212 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 17:51:52,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:51:52,405 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:51:52,407 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:51:52,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-08-30 17:51:52,424 INFO L130 PetriNetUnfolder]: 18/147 cut-off events. [2023-08-30 17:51:52,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:51:52,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 17:51:52,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-08-30 17:51:52,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:52,427 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:51:52,427 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:52,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:52,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-08-30 17:51:52,448 INFO L130 PetriNetUnfolder]: 17/142 cut-off events. [2023-08-30 17:51:52,449 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:52,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 17:51:52,457 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-30 17:51:56,776 INFO L134 LiptonReduction]: Checked pairs total: 3950 [2023-08-30 17:51:56,776 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-30 17:51:56,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:51:56,779 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:51:56,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:51:56,782 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 17:51:56,782 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:51:56,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:51:56,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:51:56,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:51:56,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:51:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1200534038, now seen corresponding path program 1 times [2023-08-30 17:51:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:51:56,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112426072] [2023-08-30 17:51:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:51:56,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:51:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:51:56,814 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:51:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:51:56,835 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:51:56,836 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:51:56,836 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:51:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:51:56,837 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:51:56,837 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:51:56,838 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:51:56,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:51:56,851 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:51:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,869 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-08-30 17:51:56,870 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:51:56,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-30 17:51:56,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:51:56,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:51:56,889 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-08-30 17:51:56,890 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:51:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-30 17:51:56,895 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-30 17:52:00,004 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-08-30 17:52:00,005 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-30 17:52:00,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:00,014 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:00,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:00,017 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-30 17:52:00,017 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:00,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:00,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:52:00,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:00,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 25344275, now seen corresponding path program 1 times [2023-08-30 17:52:00,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444226346] [2023-08-30 17:52:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:00,104 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 17:52:00,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:00,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444226346] [2023-08-30 17:52:00,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444226346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:00,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:00,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:52:00,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877761974] [2023-08-30 17:52:00,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:00,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:00,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 253 [2023-08-30 17:52:00,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 17:52:00,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:00,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 253 [2023-08-30 17:52:00,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:00,394 INFO L130 PetriNetUnfolder]: 1627/2909 cut-off events. [2023-08-30 17:52:00,394 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-30 17:52:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2909 events. 1627/2909 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16618 event pairs, 562 based on Foata normal form. 522/3143 useless extension candidates. Maximal degree in co-relation 3944. Up to 2412 conditions per place. [2023-08-30 17:52:00,403 INFO L137 encePairwiseOnDemand]: 235/253 looper letters, 32 selfloop transitions, 3 changer transitions 15/57 dead transitions. [2023-08-30 17:52:00,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 233 flow [2023-08-30 17:52:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-30 17:52:00,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533596837944664 [2023-08-30 17:52:00,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-30 17:52:00,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-30 17:52:00,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:00,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-30 17:52:00,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 17:52:00,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 17:52:00,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 17:52:00,409 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 420 transitions. [2023-08-30 17:52:00,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 233 flow [2023-08-30 17:52:00,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:00,412 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 89 flow [2023-08-30 17:52:00,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-30 17:52:00,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 17:52:00,413 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 89 flow [2023-08-30 17:52:00,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 17:52:00,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:00,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:00,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 17:52:00,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:00,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1454053430, now seen corresponding path program 1 times [2023-08-30 17:52:00,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:00,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875836878] [2023-08-30 17:52:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:00,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:00,458 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 17:52:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875836878] [2023-08-30 17:52:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875836878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419039086] [2023-08-30 17:52:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:00,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:00,461 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 17:52:00,490 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 17:52:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:00,581 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 17:52:00,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:00,595 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 17:52:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419039086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:00,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:00,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:52:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049755046] [2023-08-30 17:52:00,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:00,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:52:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:52:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:52:00,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 253 [2023-08-30 17:52:00,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 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 17:52:00,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:00,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 253 [2023-08-30 17:52:00,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:00,691 INFO L130 PetriNetUnfolder]: 299/564 cut-off events. [2023-08-30 17:52:00,692 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:52:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 564 events. 299/564 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2670 event pairs, 0 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 743. Up to 370 conditions per place. [2023-08-30 17:52:00,694 INFO L137 encePairwiseOnDemand]: 250/253 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-30 17:52:00,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 222 flow [2023-08-30 17:52:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:52:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:52:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 630 transitions. [2023-08-30 17:52:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980237154150198 [2023-08-30 17:52:00,696 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 630 transitions. [2023-08-30 17:52:00,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 630 transitions. [2023-08-30 17:52:00,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:00,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 630 transitions. [2023-08-30 17:52:00,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 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 17:52:00,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 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 17:52:00,701 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 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 17:52:00,701 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 89 flow. Second operand 5 states and 630 transitions. [2023-08-30 17:52:00,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 222 flow [2023-08-30 17:52:00,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:52:00,702 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:52:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-30 17:52:00,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-30 17:52:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:52:00,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 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 17:52:00,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:00,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:52:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 17:52:00,929 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:00,930 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,946 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-08-30 17:52:00,947 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:00,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-30 17:52:00,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,949 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:00,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-30 17:52:00,964 INFO L130 PetriNetUnfolder]: 32/234 cut-off events. [2023-08-30 17:52:00,965 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:52:00,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-30 17:52:00,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-30 17:52:04,939 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-08-30 17:52:04,939 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-30 17:52:04,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:52:04,941 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:04,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:04,945 INFO L130 PetriNetUnfolder]: 10/56 cut-off events. [2023-08-30 17:52:04,946 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:52:04,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:04,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:52:04,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:52:04,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash 408421678, now seen corresponding path program 1 times [2023-08-30 17:52:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180270388] [2023-08-30 17:52:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:04,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:04,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:52:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:04,970 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:52:04,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:52:04,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:52:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:52:04,971 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:52:04,972 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:52:04,972 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:52:04,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:52:04,986 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:52:04,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,012 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-08-30 17:52:05,013 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:05,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-08-30 17:52:05,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:05,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:05,049 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-08-30 17:52:05,050 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:05,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-08-30 17:52:05,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-08-30 17:52:08,097 INFO L134 LiptonReduction]: Checked pairs total: 36318 [2023-08-30 17:52:08,098 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-30 17:52:08,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:08,099 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:08,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:08,101 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-30 17:52:08,101 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:08,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:08,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:52:08,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:08,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 38919773, now seen corresponding path program 1 times [2023-08-30 17:52:08,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:08,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578303141] [2023-08-30 17:52:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:08,175 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 17:52:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:08,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578303141] [2023-08-30 17:52:08,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578303141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:08,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:08,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:52:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617002386] [2023-08-30 17:52:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:08,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:08,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2023-08-30 17:52:08,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 17:52:08,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:08,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2023-08-30 17:52:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:10,840 INFO L130 PetriNetUnfolder]: 23764/35555 cut-off events. [2023-08-30 17:52:10,840 INFO L131 PetriNetUnfolder]: For 1093/1093 co-relation queries the response was YES. [2023-08-30 17:52:10,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69833 conditions, 35555 events. 23764/35555 cut-off events. For 1093/1093 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 241346 event pairs, 10042 based on Foata normal form. 7127/40031 useless extension candidates. Maximal degree in co-relation 38074. Up to 32541 conditions per place. [2023-08-30 17:52:11,000 INFO L137 encePairwiseOnDemand]: 273/298 looper letters, 44 selfloop transitions, 4 changer transitions 16/74 dead transitions. [2023-08-30 17:52:11,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 314 flow [2023-08-30 17:52:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 17:52:11,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615212527964206 [2023-08-30 17:52:11,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 17:52:11,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 17:52:11,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:11,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 17:52:11,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 17:52:11,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 17:52:11,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 17:52:11,008 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 502 transitions. [2023-08-30 17:52:11,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 314 flow [2023-08-30 17:52:11,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:11,015 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 127 flow [2023-08-30 17:52:11,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-08-30 17:52:11,018 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 17:52:11,019 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 127 flow [2023-08-30 17:52:11,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 17:52:11,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:11,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:11,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 17:52:11,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:11,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash -690637982, now seen corresponding path program 1 times [2023-08-30 17:52:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016686670] [2023-08-30 17:52:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:11,097 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 17:52:11,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:11,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016686670] [2023-08-30 17:52:11,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016686670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:11,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306397053] [2023-08-30 17:52:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:11,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:11,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:11,101 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 17:52:11,130 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 17:52:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:11,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:11,228 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 17:52:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:11,248 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 17:52:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306397053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:11,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:11,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:52:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162710945] [2023-08-30 17:52:11,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:11,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:52:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:52:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:52:11,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-08-30 17:52:11,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 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 17:52:11,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:11,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-08-30 17:52:11,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:11,886 INFO L130 PetriNetUnfolder]: 5560/8383 cut-off events. [2023-08-30 17:52:11,887 INFO L131 PetriNetUnfolder]: For 1009/1009 co-relation queries the response was YES. [2023-08-30 17:52:11,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17651 conditions, 8383 events. 5560/8383 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 49591 event pairs, 0 based on Foata normal form. 0/8383 useless extension candidates. Maximal degree in co-relation 11324. Up to 5346 conditions per place. [2023-08-30 17:52:11,917 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-08-30 17:52:11,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 101 transitions, 445 flow [2023-08-30 17:52:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:52:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:52:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 921 transitions. [2023-08-30 17:52:11,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151006711409396 [2023-08-30 17:52:11,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 921 transitions. [2023-08-30 17:52:11,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 921 transitions. [2023-08-30 17:52:11,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:11,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 921 transitions. [2023-08-30 17:52:11,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.5) internal successors, (921), 6 states have internal predecessors, (921), 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 17:52:11,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 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 17:52:11,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 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 17:52:11,926 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 127 flow. Second operand 6 states and 921 transitions. [2023-08-30 17:52:11,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 101 transitions, 445 flow [2023-08-30 17:52:11,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 433 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:52:11,929 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:52:11,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-30 17:52:11,929 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 17:52:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:52:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 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 17:52:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:11,940 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 17:52:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:12,136 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:52:12,136 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:12,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,163 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-08-30 17:52:12,164 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-08-30 17:52:12,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,168 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:12,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 174 transitions, 378 flow [2023-08-30 17:52:12,192 INFO L130 PetriNetUnfolder]: 51/352 cut-off events. [2023-08-30 17:52:12,193 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:52:12,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 352 events. 51/352 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1075 event pairs, 1 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 242. Up to 16 conditions per place. [2023-08-30 17:52:12,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-08-30 17:52:15,360 INFO L134 LiptonReduction]: Checked pairs total: 32781 [2023-08-30 17:52:15,360 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-30 17:52:15,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:52:15,362 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:15,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:15,368 INFO L130 PetriNetUnfolder]: 22/98 cut-off events. [2023-08-30 17:52:15,369 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:52:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:15,369 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:52:15,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:52:15,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 403868495, now seen corresponding path program 1 times [2023-08-30 17:52:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653763095] [2023-08-30 17:52:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:15,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:52:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:52:15,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:52:15,403 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:52:15,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:52:15,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:52:15,404 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:52:15,406 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:52:15,406 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:52:15,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:52:15,427 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:52:15,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,479 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-08-30 17:52:15,480 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:15,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-08-30 17:52:15,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:15,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:15,536 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-08-30 17:52:15,536 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:15,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-08-30 17:52:15,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-08-30 17:52:18,668 INFO L134 LiptonReduction]: Checked pairs total: 55487 [2023-08-30 17:52:18,669 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-30 17:52:18,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:52:18,670 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:52:18,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:52:18,671 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-08-30 17:52:18,671 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:52:18,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:18,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:52:18,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:18,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash 54247970, now seen corresponding path program 1 times [2023-08-30 17:52:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:18,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467029457] [2023-08-30 17:52:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:18,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:18,742 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 17:52:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467029457] [2023-08-30 17:52:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467029457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:52:18,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:52:18,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:52:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891867159] [2023-08-30 17:52:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:52:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:52:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:52:18,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:52:18,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 345 [2023-08-30 17:52:18,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 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 17:52:18,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:18,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 345 [2023-08-30 17:52:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:43,212 INFO L130 PetriNetUnfolder]: 302725/412614 cut-off events. [2023-08-30 17:52:43,213 INFO L131 PetriNetUnfolder]: For 16070/16070 co-relation queries the response was YES. [2023-08-30 17:52:44,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815936 conditions, 412614 events. 302725/412614 cut-off events. For 16070/16070 co-relation queries the response was YES. Maximal size of possible extension queue 8625. Compared 3087403 event pairs, 148630 based on Foata normal form. 66467/454206 useless extension candidates. Maximal degree in co-relation 348377. Up to 391242 conditions per place. [2023-08-30 17:52:44,843 INFO L137 encePairwiseOnDemand]: 313/345 looper letters, 56 selfloop transitions, 5 changer transitions 17/91 dead transitions. [2023-08-30 17:52:44,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 399 flow [2023-08-30 17:52:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:52:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:52:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-30 17:52:44,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642512077294686 [2023-08-30 17:52:44,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-30 17:52:44,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-30 17:52:44,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:44,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-30 17:52:44,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 17:52:44,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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 17:52:44,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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 17:52:44,851 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 584 transitions. [2023-08-30 17:52:44,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 399 flow [2023-08-30 17:52:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:52:44,864 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 167 flow [2023-08-30 17:52:44,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2023-08-30 17:52:44,865 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:52:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 167 flow [2023-08-30 17:52:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 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 17:52:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:44,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 17:52:44,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:44,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 295889387, now seen corresponding path program 1 times [2023-08-30 17:52:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746341543] [2023-08-30 17:52:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:44,914 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 17:52:44,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746341543] [2023-08-30 17:52:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746341543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943504709] [2023-08-30 17:52:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:44,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:44,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:44,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:52:44,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:52:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:44,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:52:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:45,074 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 17:52:45,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:45,087 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 17:52:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943504709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:45,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:45,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 17:52:45,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80959437] [2023-08-30 17:52:45,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:52:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:52:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:52:45,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 345 [2023-08-30 17:52:45,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 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 17:52:45,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:45,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 345 [2023-08-30 17:52:45,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:52,954 INFO L130 PetriNetUnfolder]: 107481/144070 cut-off events. [2023-08-30 17:52:52,954 INFO L131 PetriNetUnfolder]: For 13373/13373 co-relation queries the response was YES. [2023-08-30 17:52:53,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305508 conditions, 144070 events. 107481/144070 cut-off events. For 13373/13373 co-relation queries the response was YES. Maximal size of possible extension queue 3812. Compared 997777 event pairs, 8613 based on Foata normal form. 0/137981 useless extension candidates. Maximal degree in co-relation 183876. Up to 91786 conditions per place. [2023-08-30 17:52:53,685 INFO L137 encePairwiseOnDemand]: 341/345 looper letters, 120 selfloop transitions, 6 changer transitions 0/143 dead transitions. [2023-08-30 17:52:53,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 620 flow [2023-08-30 17:52:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:52:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:52:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-08-30 17:52:53,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251207729468599 [2023-08-30 17:52:53,689 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-08-30 17:52:53,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-08-30 17:52:53,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:53,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-08-30 17:52:53,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 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 17:52:53,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 345.0) internal successors, (2415), 7 states have internal predecessors, (2415), 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 17:52:53,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 345.0) internal successors, (2415), 7 states have internal predecessors, (2415), 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 17:52:53,695 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 167 flow. Second operand 6 states and 1087 transitions. [2023-08-30 17:52:53,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 620 flow [2023-08-30 17:52:53,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 143 transitions, 602 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:52:53,702 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 198 flow [2023-08-30 17:52:53,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-08-30 17:52:53,703 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-30 17:52:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 198 flow [2023-08-30 17:52:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 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 17:52:53,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:52:53,704 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:52:53,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 17:52:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:53,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:52:53,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:52:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1594440125, now seen corresponding path program 1 times [2023-08-30 17:52:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:52:53,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821826013] [2023-08-30 17:52:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:52:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:52:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821826013] [2023-08-30 17:52:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821826013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:52:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564490869] [2023-08-30 17:52:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:52:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:52:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:52:54,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:52:54,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:52:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:52:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:52:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:52:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:54,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:52:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:52:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564490869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:52:54,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:52:54,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-30 17:52:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921192324] [2023-08-30 17:52:54,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:52:54,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 17:52:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:52:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 17:52:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 17:52:54,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 345 [2023-08-30 17:52:54,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 198 flow. Second operand has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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 17:52:54,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:52:54,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 345 [2023-08-30 17:52:54,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:52:58,657 INFO L130 PetriNetUnfolder]: 53669/74508 cut-off events. [2023-08-30 17:52:58,658 INFO L131 PetriNetUnfolder]: For 76527/76527 co-relation queries the response was YES. [2023-08-30 17:52:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176257 conditions, 74508 events. 53669/74508 cut-off events. For 76527/76527 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 509425 event pairs, 5640 based on Foata normal form. 5117/79286 useless extension candidates. Maximal degree in co-relation 60594. Up to 46151 conditions per place. [2023-08-30 17:52:58,955 INFO L137 encePairwiseOnDemand]: 342/345 looper letters, 0 selfloop transitions, 0 changer transitions 140/140 dead transitions. [2023-08-30 17:52:58,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 140 transitions, 620 flow [2023-08-30 17:52:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:52:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:52:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1242 transitions. [2023-08-30 17:52:58,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-08-30 17:52:58,961 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1242 transitions. [2023-08-30 17:52:58,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1242 transitions. [2023-08-30 17:52:58,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:52:58,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1242 transitions. [2023-08-30 17:52:58,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.42857142857142) internal successors, (1242), 7 states have internal predecessors, (1242), 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 17:52:58,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 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 17:52:58,969 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 345.0) internal successors, (2760), 8 states have internal predecessors, (2760), 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 17:52:58,969 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 198 flow. Second operand 7 states and 1242 transitions. [2023-08-30 17:52:58,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 140 transitions, 620 flow [2023-08-30 17:52:58,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 611 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 17:52:58,990 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-30 17:52:58,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-30 17:52:58,991 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:52:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-30 17:52:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 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 17:52:58,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:52:59,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:52:59,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 17:52:59,201 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:52:59,202 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:52:59,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,458 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-08-30 17:52:59,468 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:59,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-08-30 17:52:59,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,476 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:52:59,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 204 transitions, 452 flow [2023-08-30 17:52:59,509 INFO L130 PetriNetUnfolder]: 82/534 cut-off events. [2023-08-30 17:52:59,509 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:52:59,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 534 events. 82/534 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 6 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2023-08-30 17:52:59,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-08-30 17:53:02,638 INFO L134 LiptonReduction]: Checked pairs total: 55487 [2023-08-30 17:53:02,638 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 17:53:02,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:53:02,639 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:02,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:02,647 INFO L130 PetriNetUnfolder]: 29/132 cut-off events. [2023-08-30 17:53:02,647 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:53:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:53:02,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:53:02,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash 302222193, now seen corresponding path program 1 times [2023-08-30 17:53:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714033761] [2023-08-30 17:53:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:02,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:53:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:53:02,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:53:02,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:53:02,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:53:02,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 17:53:02,675 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:53:02,675 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:53:02,676 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:53:02,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:53:02,693 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:53:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,781 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-08-30 17:53:02,781 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:53:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-08-30 17:53:02,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:53:02,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 234 transitions, 528 flow [2023-08-30 17:53:02,881 INFO L130 PetriNetUnfolder]: 141/848 cut-off events. [2023-08-30 17:53:02,882 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:53:02,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 848 events. 141/848 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3650 event pairs, 23 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 579. Up to 80 conditions per place. [2023-08-30 17:53:02,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-08-30 17:53:06,280 INFO L134 LiptonReduction]: Checked pairs total: 93718 [2023-08-30 17:53:06,280 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-30 17:53:06,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:53:06,282 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;@5f893934, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:53:06,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:53:06,283 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2023-08-30 17:53:06,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:53:06,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:53:06,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:53:06,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:53:06,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:53:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 71425871, now seen corresponding path program 1 times [2023-08-30 17:53:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:53:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354343746] [2023-08-30 17:53:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:53:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:53:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:53:06,313 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 17:53:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:53:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354343746] [2023-08-30 17:53:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354343746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:53:06,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:53:06,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 17:53:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500180313] [2023-08-30 17:53:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:53:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:53:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:53:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:53:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:53:06,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 389 [2023-08-30 17:53:06,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 17:53:06,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:53:06,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 389 [2023-08-30 17:53:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand