./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/pthread-wmm/safe017_tso.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 f42e8f5213d7b87505465b65029831bd75698bf771428502e6718d43723a660f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:20:08,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:20:08,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:20:08,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:20:08,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:20:08,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:20:08,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:20:08,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:20:08,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:20:08,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:20:08,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:20:08,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:20:08,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:20:08,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:20:08,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:20:08,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:20:08,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:20:08,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:20:08,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:20:08,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:20:08,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:20:08,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:20:08,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:20:08,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:20:08,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:20:08,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:20:08,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:20:08,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:20:08,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:20:08,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:20:08,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:20:08,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:20:08,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:20:08,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:20:08,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:20:08,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:20:08,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:20:08,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:20:08,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:20:08,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:20:08,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:20:08,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:20:08,514 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:20:08,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:20:08,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:20:08,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:20:08,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:20:08,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:20:08,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:20:08,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:20:08,517 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:20:08,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:20:08,518 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:20:08,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:20:08,520 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:20:08,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:20:08,520 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:20:08,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:20:08,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:20:08,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:20:08,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:20:08,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:20:08,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:20:08,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:20:08,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:20:08,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:20:08,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:20:08,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:20:08,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:20:08,522 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:20:08,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:20:08,523 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:20:08,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f42e8f5213d7b87505465b65029831bd75698bf771428502e6718d43723a660f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:20:08,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:20:08,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:20:08,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:20:08,867 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:20:08,867 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:20:08,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.i [2023-08-30 23:20:10,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:20:10,283 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:20:10,287 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.i [2023-08-30 23:20:10,308 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc4b58a2f/6ebda013c6e444cbaa72197f0f2841c6/FLAG46fb33f5e [2023-08-30 23:20:10,323 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc4b58a2f/6ebda013c6e444cbaa72197f0f2841c6 [2023-08-30 23:20:10,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:20:10,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:20:10,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:20:10,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:20:10,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:20:10,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9c8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10, skipping insertion in model container [2023-08-30 23:20:10,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:20:10,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:20:10,514 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.i[945,958] [2023-08-30 23:20:10,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:20:10,648 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:20:10,661 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.i[945,958] [2023-08-30 23:20:10,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:20:10,746 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:20:10,746 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:20:10,752 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:20:10,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10 WrapperNode [2023-08-30 23:20:10,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:20:10,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:20:10,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:20:10,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:20:10,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,813 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-08-30 23:20:10,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:20:10,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:20:10,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:20:10,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:20:10,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,849 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:20:10,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:20:10,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:20:10,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:20:10,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (1/1) ... [2023-08-30 23:20:10,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:20:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:20:10,895 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 23:20:10,913 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 23:20:10,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:20:10,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:20:10,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:20:10,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:20:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:20:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 23:20:10,941 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 23:20:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 23:20:10,941 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 23:20:10,941 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 23:20:10,941 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 23:20:10,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:20:10,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:20:10,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:20:10,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:20:10,943 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 23:20:11,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:20:11,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:20:11,313 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:20:11,318 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:20:11,319 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 23:20:11,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:20:11 BoogieIcfgContainer [2023-08-30 23:20:11,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:20:11,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:20:11,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:20:11,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:20:11,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:20:10" (1/3) ... [2023-08-30 23:20:11,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ea4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:20:11, skipping insertion in model container [2023-08-30 23:20:11,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:20:10" (2/3) ... [2023-08-30 23:20:11,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8ea4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:20:11, skipping insertion in model container [2023-08-30 23:20:11,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:20:11" (3/3) ... [2023-08-30 23:20:11,331 INFO L112 eAbstractionObserver]: Analyzing ICFG safe017_tso.i [2023-08-30 23:20:11,338 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:20:11,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:20:11,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:20:11,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:20:11,421 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:20:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 82 transitions, 179 flow [2023-08-30 23:20:11,522 INFO L130 PetriNetUnfolder]: 2/79 cut-off events. [2023-08-30 23:20:11,522 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:20:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 2/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-08-30 23:20:11,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 82 transitions, 179 flow [2023-08-30 23:20:11,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 67 transitions, 143 flow [2023-08-30 23:20:11,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:20:11,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 67 transitions, 143 flow [2023-08-30 23:20:11,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 67 transitions, 143 flow [2023-08-30 23:20:11,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 67 transitions, 143 flow [2023-08-30 23:20:11,592 INFO L130 PetriNetUnfolder]: 1/67 cut-off events. [2023-08-30 23:20:11,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:20:11,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 1/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-30 23:20:11,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 974 [2023-08-30 23:20:13,322 INFO L134 LiptonReduction]: Checked pairs total: 1517 [2023-08-30 23:20:13,322 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-30 23:20:13,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:20:13,346 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;@6f251ad4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:20:13,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:20:13,355 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-08-30 23:20:13,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:20:13,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:13,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:13,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:13,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash -461623188, now seen corresponding path program 1 times [2023-08-30 23:20:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:13,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250287677] [2023-08-30 23:20:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:13,862 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 23:20:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:13,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250287677] [2023-08-30 23:20:13,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250287677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:13,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:13,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:20:13,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310237990] [2023-08-30 23:20:13,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:20:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:20:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:20:13,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:13,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 23:20:13,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:13,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:13,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:14,042 INFO L130 PetriNetUnfolder]: 408/676 cut-off events. [2023-08-30 23:20:14,042 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 23:20:14,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 676 events. 408/676 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2896 event pairs, 157 based on Foata normal form. 37/713 useless extension candidates. Maximal degree in co-relation 1388. Up to 382 conditions per place. [2023-08-30 23:20:14,048 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 23 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-08-30 23:20:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 131 flow [2023-08-30 23:20:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:20:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:20:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-30 23:20:14,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-30 23:20:14,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-30 23:20:14,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-30 23:20:14,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:14,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-30 23:20:14,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 23:20:14,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 23:20:14,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 23:20:14,081 INFO L175 Difference]: Start difference. First operand has 26 places, 16 transitions, 41 flow. Second operand 3 states and 234 transitions. [2023-08-30 23:20:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 131 flow [2023-08-30 23:20:14,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 23:20:14,088 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 84 flow [2023-08-30 23:20:14,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-30 23:20:14,093 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-30 23:20:14,093 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 84 flow [2023-08-30 23:20:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 23:20:14,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:14,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:20:14,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:14,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1425417441, now seen corresponding path program 1 times [2023-08-30 23:20:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:14,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361804468] [2023-08-30 23:20:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:14,348 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 23:20:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:14,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361804468] [2023-08-30 23:20:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361804468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:14,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:14,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:20:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414069115] [2023-08-30 23:20:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:14,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:14,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 23:20:14,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:14,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:14,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:14,483 INFO L130 PetriNetUnfolder]: 380/633 cut-off events. [2023-08-30 23:20:14,483 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2023-08-30 23:20:14,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 633 events. 380/633 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2587 event pairs, 85 based on Foata normal form. 9/642 useless extension candidates. Maximal degree in co-relation 1751. Up to 264 conditions per place. [2023-08-30 23:20:14,490 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 26 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2023-08-30 23:20:14,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 190 flow [2023-08-30 23:20:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-30 23:20:14,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2023-08-30 23:20:14,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-30 23:20:14,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-30 23:20:14,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:14,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-30 23:20:14,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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 23:20:14,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:14,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:14,502 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 84 flow. Second operand 4 states and 303 transitions. [2023-08-30 23:20:14,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 190 flow [2023-08-30 23:20:14,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:20:14,506 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 120 flow [2023-08-30 23:20:14,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-30 23:20:14,507 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-30 23:20:14,507 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 120 flow [2023-08-30 23:20:14,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 23:20:14,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:14,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:14,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:20:14,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:14,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1425418185, now seen corresponding path program 1 times [2023-08-30 23:20:14,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:14,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855101729] [2023-08-30 23:20:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:14,691 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 23:20:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855101729] [2023-08-30 23:20:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855101729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:14,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:20:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652852871] [2023-08-30 23:20:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:14,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:14,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 23:20:14,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:14,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:14,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:14,795 INFO L130 PetriNetUnfolder]: 365/609 cut-off events. [2023-08-30 23:20:14,795 INFO L131 PetriNetUnfolder]: For 500/500 co-relation queries the response was YES. [2023-08-30 23:20:14,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 609 events. 365/609 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2509 event pairs, 61 based on Foata normal form. 3/612 useless extension candidates. Maximal degree in co-relation 1851. Up to 304 conditions per place. [2023-08-30 23:20:14,799 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 33 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-08-30 23:20:14,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 282 flow [2023-08-30 23:20:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-30 23:20:14,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-30 23:20:14,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-30 23:20:14,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-30 23:20:14,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:14,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-30 23:20:14,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 23:20:14,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:14,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:14,805 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 120 flow. Second operand 4 states and 312 transitions. [2023-08-30 23:20:14,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 282 flow [2023-08-30 23:20:14,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:20:14,808 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 184 flow [2023-08-30 23:20:14,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-08-30 23:20:14,809 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-08-30 23:20:14,810 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 184 flow [2023-08-30 23:20:14,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 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 23:20:14,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:14,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:20:14,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:14,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1238268956, now seen corresponding path program 1 times [2023-08-30 23:20:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:14,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953793074] [2023-08-30 23:20:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:14,923 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 23:20:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953793074] [2023-08-30 23:20:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953793074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:14,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:20:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996236510] [2023-08-30 23:20:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:14,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:14,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 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 23:20:14,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:14,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:14,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:15,034 INFO L130 PetriNetUnfolder]: 351/588 cut-off events. [2023-08-30 23:20:15,036 INFO L131 PetriNetUnfolder]: For 991/991 co-relation queries the response was YES. [2023-08-30 23:20:15,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 588 events. 351/588 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2380 event pairs, 54 based on Foata normal form. 3/591 useless extension candidates. Maximal degree in co-relation 2042. Up to 293 conditions per place. [2023-08-30 23:20:15,040 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 35 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2023-08-30 23:20:15,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 401 flow [2023-08-30 23:20:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-30 23:20:15,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575925925925926 [2023-08-30 23:20:15,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-30 23:20:15,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-30 23:20:15,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:15,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-30 23:20:15,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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 23:20:15,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:15,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:15,046 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 184 flow. Second operand 4 states and 311 transitions. [2023-08-30 23:20:15,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 401 flow [2023-08-30 23:20:15,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 401 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:20:15,052 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 329 flow [2023-08-30 23:20:15,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=329, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-30 23:20:15,054 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-08-30 23:20:15,054 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 329 flow [2023-08-30 23:20:15,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 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 23:20:15,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:15,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:20:15,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:15,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1872185572, now seen corresponding path program 1 times [2023-08-30 23:20:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334917120] [2023-08-30 23:20:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:15,172 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 23:20:15,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:15,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334917120] [2023-08-30 23:20:15,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334917120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:15,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:20:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703906776] [2023-08-30 23:20:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:15,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:15,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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 23:20:15,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:15,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:15,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:15,310 INFO L130 PetriNetUnfolder]: 374/637 cut-off events. [2023-08-30 23:20:15,311 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-08-30 23:20:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2485 conditions, 637 events. 374/637 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2717 event pairs, 67 based on Foata normal form. 6/643 useless extension candidates. Maximal degree in co-relation 2462. Up to 295 conditions per place. [2023-08-30 23:20:15,315 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 33 selfloop transitions, 19 changer transitions 1/53 dead transitions. [2023-08-30 23:20:15,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 490 flow [2023-08-30 23:20:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-30 23:20:15,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-30 23:20:15,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-30 23:20:15,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-30 23:20:15,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:15,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-30 23:20:15,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 23:20:15,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:15,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:15,320 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 329 flow. Second operand 4 states and 312 transitions. [2023-08-30 23:20:15,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 490 flow [2023-08-30 23:20:15,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:20:15,326 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 384 flow [2023-08-30 23:20:15,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-08-30 23:20:15,327 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-08-30 23:20:15,327 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 384 flow [2023-08-30 23:20:15,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 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 23:20:15,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:15,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:20:15,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:15,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 268388886, now seen corresponding path program 1 times [2023-08-30 23:20:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784602809] [2023-08-30 23:20:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:15,458 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 23:20:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784602809] [2023-08-30 23:20:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784602809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:20:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491502760] [2023-08-30 23:20:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:15,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 135 [2023-08-30 23:20:15,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 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 23:20:15,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:15,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 135 [2023-08-30 23:20:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:15,561 INFO L130 PetriNetUnfolder]: 249/486 cut-off events. [2023-08-30 23:20:15,561 INFO L131 PetriNetUnfolder]: For 2406/2428 co-relation queries the response was YES. [2023-08-30 23:20:15,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 486 events. 249/486 cut-off events. For 2406/2428 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2423 event pairs, 48 based on Foata normal form. 36/517 useless extension candidates. Maximal degree in co-relation 1922. Up to 281 conditions per place. [2023-08-30 23:20:15,565 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 45 selfloop transitions, 7 changer transitions 23/86 dead transitions. [2023-08-30 23:20:15,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 1007 flow [2023-08-30 23:20:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:20:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:20:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 394 transitions. [2023-08-30 23:20:15,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837037037037037 [2023-08-30 23:20:15,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 394 transitions. [2023-08-30 23:20:15,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 394 transitions. [2023-08-30 23:20:15,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:15,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 394 transitions. [2023-08-30 23:20:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 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 23:20:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 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 23:20:15,570 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 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 23:20:15,570 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 384 flow. Second operand 5 states and 394 transitions. [2023-08-30 23:20:15,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 1007 flow [2023-08-30 23:20:15,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 995 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 23:20:15,575 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 428 flow [2023-08-30 23:20:15,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-30 23:20:15,576 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2023-08-30 23:20:15,576 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 428 flow [2023-08-30 23:20:15,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 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 23:20:15,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:15,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:15,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:20:15,577 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:15,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash 862544309, now seen corresponding path program 1 times [2023-08-30 23:20:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:15,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092265004] [2023-08-30 23:20:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:15,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:15,697 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 23:20:15,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:15,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092265004] [2023-08-30 23:20:15,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092265004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:15,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:15,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:20:15,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675230106] [2023-08-30 23:20:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:15,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:20:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:20:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:20:15,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 135 [2023-08-30 23:20:15,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 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 23:20:15,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:15,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 135 [2023-08-30 23:20:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:15,822 INFO L130 PetriNetUnfolder]: 194/411 cut-off events. [2023-08-30 23:20:15,822 INFO L131 PetriNetUnfolder]: For 2444/2519 co-relation queries the response was YES. [2023-08-30 23:20:15,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2048 conditions, 411 events. 194/411 cut-off events. For 2444/2519 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2131 event pairs, 15 based on Foata normal form. 71/479 useless extension candidates. Maximal degree in co-relation 2016. Up to 145 conditions per place. [2023-08-30 23:20:15,825 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 50 selfloop transitions, 11 changer transitions 31/102 dead transitions. [2023-08-30 23:20:15,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 102 transitions, 1205 flow [2023-08-30 23:20:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 23:20:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 23:20:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 550 transitions. [2023-08-30 23:20:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2023-08-30 23:20:15,827 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 550 transitions. [2023-08-30 23:20:15,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 550 transitions. [2023-08-30 23:20:15,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:15,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 550 transitions. [2023-08-30 23:20:15,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 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 23:20:15,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 23:20:15,831 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 23:20:15,831 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 428 flow. Second operand 7 states and 550 transitions. [2023-08-30 23:20:15,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 102 transitions, 1205 flow [2023-08-30 23:20:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 102 transitions, 1205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:20:15,837 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 489 flow [2023-08-30 23:20:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-30 23:20:15,839 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-30 23:20:15,839 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 489 flow [2023-08-30 23:20:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 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 23:20:15,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:15,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:15,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:20:15,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:15,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -313975773, now seen corresponding path program 1 times [2023-08-30 23:20:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268119251] [2023-08-30 23:20:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:15,947 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 23:20:15,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268119251] [2023-08-30 23:20:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268119251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:15,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:15,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:20:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47362761] [2023-08-30 23:20:15,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:20:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:20:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:20:15,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:15,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 489 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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 23:20:15,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:15,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:15,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:16,062 INFO L130 PetriNetUnfolder]: 256/535 cut-off events. [2023-08-30 23:20:16,062 INFO L131 PetriNetUnfolder]: For 4100/4100 co-relation queries the response was YES. [2023-08-30 23:20:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3239 conditions, 535 events. 256/535 cut-off events. For 4100/4100 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2730 event pairs, 43 based on Foata normal form. 6/541 useless extension candidates. Maximal degree in co-relation 3202. Up to 232 conditions per place. [2023-08-30 23:20:16,065 INFO L137 encePairwiseOnDemand]: 128/135 looper letters, 37 selfloop transitions, 16 changer transitions 26/79 dead transitions. [2023-08-30 23:20:16,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 921 flow [2023-08-30 23:20:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 308 transitions. [2023-08-30 23:20:16,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2023-08-30 23:20:16,067 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 308 transitions. [2023-08-30 23:20:16,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 308 transitions. [2023-08-30 23:20:16,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:16,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 308 transitions. [2023-08-30 23:20:16,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 23:20:16,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:16,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:16,070 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 489 flow. Second operand 4 states and 308 transitions. [2023-08-30 23:20:16,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 921 flow [2023-08-30 23:20:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 849 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-30 23:20:16,080 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 431 flow [2023-08-30 23:20:16,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=431, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-08-30 23:20:16,081 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2023-08-30 23:20:16,081 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 431 flow [2023-08-30 23:20:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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 23:20:16,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:16,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:16,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:20:16,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:16,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1416130988, now seen corresponding path program 1 times [2023-08-30 23:20:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097357154] [2023-08-30 23:20:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:16,205 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 23:20:16,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:16,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097357154] [2023-08-30 23:20:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097357154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:16,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:20:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054641] [2023-08-30 23:20:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 23:20:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 23:20:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 23:20:16,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 135 [2023-08-30 23:20:16,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 431 flow. Second operand has 6 states, 6 states have (on average 73.16666666666667) internal successors, (439), 6 states have internal predecessors, (439), 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 23:20:16,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:16,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 135 [2023-08-30 23:20:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:16,308 INFO L130 PetriNetUnfolder]: 95/216 cut-off events. [2023-08-30 23:20:16,309 INFO L131 PetriNetUnfolder]: For 1440/1471 co-relation queries the response was YES. [2023-08-30 23:20:16,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 216 events. 95/216 cut-off events. For 1440/1471 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 859 event pairs, 11 based on Foata normal form. 27/241 useless extension candidates. Maximal degree in co-relation 1170. Up to 73 conditions per place. [2023-08-30 23:20:16,310 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 13 selfloop transitions, 10 changer transitions 41/66 dead transitions. [2023-08-30 23:20:16,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 860 flow [2023-08-30 23:20:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 23:20:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 23:20:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2023-08-30 23:20:16,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693121693121693 [2023-08-30 23:20:16,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 538 transitions. [2023-08-30 23:20:16,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 538 transitions. [2023-08-30 23:20:16,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:16,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 538 transitions. [2023-08-30 23:20:16,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 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 23:20:16,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 23:20:16,317 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 23:20:16,317 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 431 flow. Second operand 7 states and 538 transitions. [2023-08-30 23:20:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 860 flow [2023-08-30 23:20:16,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 772 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-30 23:20:16,323 INFO L231 Difference]: Finished difference. Result has 61 places, 22 transitions, 218 flow [2023-08-30 23:20:16,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=61, PETRI_TRANSITIONS=22} [2023-08-30 23:20:16,323 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-30 23:20:16,324 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 22 transitions, 218 flow [2023-08-30 23:20:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.16666666666667) internal successors, (439), 6 states have internal predecessors, (439), 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 23:20:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:20:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:20:16,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:20:16,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:20:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 729209761, now seen corresponding path program 1 times [2023-08-30 23:20:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:20:16,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890391768] [2023-08-30 23:20:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:20:16,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:20:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:20:16,431 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 23:20:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:20:16,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890391768] [2023-08-30 23:20:16,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890391768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:20:16,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:20:16,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:20:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796939327] [2023-08-30 23:20:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:20:16,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:20:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:20:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:20:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:20:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 135 [2023-08-30 23:20:16,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 22 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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 23:20:16,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:20:16,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 135 [2023-08-30 23:20:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:20:16,470 INFO L130 PetriNetUnfolder]: 11/35 cut-off events. [2023-08-30 23:20:16,470 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2023-08-30 23:20:16,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 35 events. 11/35 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 3 based on Foata normal form. 1/36 useless extension candidates. Maximal degree in co-relation 223. Up to 23 conditions per place. [2023-08-30 23:20:16,471 INFO L137 encePairwiseOnDemand]: 132/135 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-30 23:20:16,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 22 transitions, 253 flow [2023-08-30 23:20:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:20:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:20:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2023-08-30 23:20:16,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351851851851852 [2023-08-30 23:20:16,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 289 transitions. [2023-08-30 23:20:16,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 289 transitions. [2023-08-30 23:20:16,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:20:16,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 289 transitions. [2023-08-30 23:20:16,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 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 23:20:16,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:16,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 23:20:16,475 INFO L175 Difference]: Start difference. First operand has 61 places, 22 transitions, 218 flow. Second operand 4 states and 289 transitions. [2023-08-30 23:20:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 22 transitions, 253 flow [2023-08-30 23:20:16,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 22 transitions, 136 flow, removed 9 selfloop flow, removed 27 redundant places. [2023-08-30 23:20:16,477 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-30 23:20:16,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-30 23:20:16,477 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-30 23:20:16,478 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-30 23:20:16,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 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 23:20:16,480 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 23:20:16,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 23:20:16,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 23:20:16,481 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 23:20:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:20:16,481 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:20:16,484 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 23:20:16,484 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 23:20:16,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 11:20:16 BasicIcfg [2023-08-30 23:20:16,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 23:20:16,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 23:20:16,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 23:20:16,487 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 23:20:16,487 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:20:11" (3/4) ... [2023-08-30 23:20:16,490 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 23:20:16,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-08-30 23:20:16,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-08-30 23:20:16,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-08-30 23:20:16,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 23:20:16,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 23:20:16,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 23:20:16,499 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 23:20:16,524 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 23:20:16,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 23:20:16,525 INFO L158 Benchmark]: Toolchain (without parser) took 6198.71ms. Allocated memory was 65.0MB in the beginning and 153.1MB in the end (delta: 88.1MB). Free memory was 33.0MB in the beginning and 63.2MB in the end (delta: -30.1MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,525 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 48.2MB. Free memory was 26.8MB in the beginning and 26.7MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 23:20:16,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 424.78ms. Allocated memory is still 65.0MB. Free memory was 32.9MB in the beginning and 32.3MB in the end (delta: 550.8kB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.06ms. Allocated memory is still 65.0MB. Free memory was 32.3MB in the beginning and 30.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,526 INFO L158 Benchmark]: Boogie Preprocessor took 47.52ms. Allocated memory is still 65.0MB. Free memory was 30.1MB in the beginning and 28.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,526 INFO L158 Benchmark]: RCFGBuilder took 461.65ms. Allocated memory is still 65.0MB. Free memory was 28.7MB in the beginning and 33.6MB in the end (delta: -4.9MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,526 INFO L158 Benchmark]: TraceAbstraction took 5160.51ms. Allocated memory was 65.0MB in the beginning and 153.1MB in the end (delta: 88.1MB). Free memory was 32.8MB in the beginning and 66.3MB in the end (delta: -33.5MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,527 INFO L158 Benchmark]: Witness Printer took 37.54ms. Allocated memory is still 153.1MB. Free memory was 66.3MB in the beginning and 63.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 23:20:16,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 48.2MB. Free memory was 26.8MB in the beginning and 26.7MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 424.78ms. Allocated memory is still 65.0MB. Free memory was 32.9MB in the beginning and 32.3MB in the end (delta: 550.8kB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.06ms. Allocated memory is still 65.0MB. Free memory was 32.3MB in the beginning and 30.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.52ms. Allocated memory is still 65.0MB. Free memory was 30.1MB in the beginning and 28.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 461.65ms. Allocated memory is still 65.0MB. Free memory was 28.7MB in the beginning and 33.6MB in the end (delta: -4.9MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5160.51ms. Allocated memory was 65.0MB in the beginning and 153.1MB in the end (delta: 88.1MB). Free memory was 32.8MB in the beginning and 66.3MB in the end (delta: -33.5MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. * Witness Printer took 37.54ms. Allocated memory is still 153.1MB. Free memory was 66.3MB in the beginning and 63.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 76 PlacesBefore, 26 PlacesAfterwards, 67 TransitionsBefore, 16 TransitionsAfterwards, 974 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 1 ChoiceCompositions, 53 TotalNumberOfCompositions, 1517 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 846, independent: 782, independent conditional: 0, independent unconditional: 782, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 516, independent: 496, independent conditional: 0, independent unconditional: 496, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 846, independent: 286, independent conditional: 0, independent unconditional: 286, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 516, unknown conditional: 0, unknown unconditional: 516] , Statistics on independence cache: Total cache size (in pairs): 31, Positive cache size: 23, Positive conditional cache size: 0, Positive unconditional cache size: 23, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 104 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 299 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 197 mSDsluCounter, 108 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 584 IncrementalHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 59 mSDtfsCounter, 584 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=489occurred in iteration=7, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 479 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 23:20:16,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE