./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/pthread/stack-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:00:36,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:00:36,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:00:36,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:00:36,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:00:36,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:00:36,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:00:36,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:00:36,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:00:36,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:00:36,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:00:36,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:00:36,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:00:36,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:00:36,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:00:36,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:00:36,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:00:36,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:00:36,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:00:36,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:00:36,481 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:00:36,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:00:36,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:00:36,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:00:36,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:00:36,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:00:36,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:00:36,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:00:36,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:00:36,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:00:36,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:00:36,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:00:36,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:00:36,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:00:36,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:00:36,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:00:36,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:00:36,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:00:36,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:00:36,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:00:36,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:00:36,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:00:36,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:00:36,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:00:36,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:00:36,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:00:36,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:00:36,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:00:36,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:00:36,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:00:36,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:00:36,533 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:00:36,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:00:36,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:00:36,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:00:36,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:00:36,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:00:36,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:00:36,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:00:36,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:00:36,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:00:36,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:00:36,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:00:36,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:00:36,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:00:36,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:00:36,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:00:36,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:00:36,538 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:00:36,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:00:36,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:00:36,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-07-19 21:00:36,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:00:36,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:00:36,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:00:36,807 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:00:36,808 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:00:36,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-2.i [2022-07-19 21:00:36,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5cc716f/69eb0fd994b34ac285582a974a593bd2/FLAG664ed4329 [2022-07-19 21:00:37,413 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:00:37,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i [2022-07-19 21:00:37,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5cc716f/69eb0fd994b34ac285582a974a593bd2/FLAG664ed4329 [2022-07-19 21:00:37,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec5cc716f/69eb0fd994b34ac285582a974a593bd2 [2022-07-19 21:00:37,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:00:37,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:00:37,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:00:37,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:00:37,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:00:37,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:00:37" (1/1) ... [2022-07-19 21:00:37,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515e0524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:37, skipping insertion in model container [2022-07-19 21:00:37,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:00:37" (1/1) ... [2022-07-19 21:00:37,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:00:37,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:00:38,111 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-07-19 21:00:38,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:00:38,158 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:00:38,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-07-19 21:00:38,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:00:38,305 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:00:38,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38 WrapperNode [2022-07-19 21:00:38,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:00:38,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:00:38,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:00:38,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:00:38,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,355 INFO L137 Inliner]: procedures = 277, calls = 46, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2022-07-19 21:00:38,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:00:38,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:00:38,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:00:38,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:00:38,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:00:38,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:00:38,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:00:38,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:00:38,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (1/1) ... [2022-07-19 21:00:38,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:00:38,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:38,415 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) [2022-07-19 21:00:38,428 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 [2022-07-19 21:00:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-19 21:00:38,453 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-19 21:00:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-19 21:00:38,453 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-19 21:00:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:00:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:00:38,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:00:38,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:00:38,456 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:00:38,632 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:00:38,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:00:38,849 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:00:38,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:00:38,857 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:00:38,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:00:38 BoogieIcfgContainer [2022-07-19 21:00:38,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:00:38,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:00:38,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:00:38,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:00:38,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:00:37" (1/3) ... [2022-07-19 21:00:38,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdb8ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:00:38, skipping insertion in model container [2022-07-19 21:00:38,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:00:38" (2/3) ... [2022-07-19 21:00:38,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdb8ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:00:38, skipping insertion in model container [2022-07-19 21:00:38,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:00:38" (3/3) ... [2022-07-19 21:00:38,867 INFO L111 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-07-19 21:00:38,872 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:00:38,881 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:00:38,881 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 21:00:38,881 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:00:38,962 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:00:39,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 182 places, 185 transitions, 386 flow [2022-07-19 21:00:39,104 INFO L129 PetriNetUnfolder]: 10/183 cut-off events. [2022-07-19 21:00:39,105 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:00:39,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 10/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 437 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-07-19 21:00:39,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 185 transitions, 386 flow [2022-07-19 21:00:39,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 173 transitions, 355 flow [2022-07-19 21:00:39,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:00:39,148 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@227b8a3c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69a9b9c3 [2022-07-19 21:00:39,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:00:39,179 INFO L129 PetriNetUnfolder]: 4/138 cut-off events. [2022-07-19 21:00:39,180 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:00:39,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:39,181 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:39,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1631243722, now seen corresponding path program 1 times [2022-07-19 21:00:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:39,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57923239] [2022-07-19 21:00:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:39,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57923239] [2022-07-19 21:00:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57923239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:39,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:39,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:00:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766619866] [2022-07-19 21:00:39,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:00:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:00:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:00:39,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 185 [2022-07-19 21:00:39,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 173 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2022-07-19 21:00:39,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:39,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 185 [2022-07-19 21:00:39,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:39,790 INFO L129 PetriNetUnfolder]: 91/896 cut-off events. [2022-07-19 21:00:39,790 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-07-19 21:00:39,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 896 events. 91/896 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5283 event pairs, 15 based on Foata normal form. 61/885 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-07-19 21:00:39,804 INFO L132 encePairwiseOnDemand]: 176/185 looper letters, 19 selfloop transitions, 3 changer transitions 0/173 dead transitions. [2022-07-19 21:00:39,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 405 flow [2022-07-19 21:00:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:00:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:00:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-07-19 21:00:39,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9441441441441442 [2022-07-19 21:00:39,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-07-19 21:00:39,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-07-19 21:00:39,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:39,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-07-19 21:00:39,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2022-07-19 21:00:39,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:39,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:39,859 INFO L186 Difference]: Start difference. First operand has 170 places, 173 transitions, 355 flow. Second operand 3 states and 524 transitions. [2022-07-19 21:00:39,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 405 flow [2022-07-19 21:00:39,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 173 transitions, 397 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:00:39,893 INFO L242 Difference]: Finished difference. Result has 166 places, 166 transitions, 351 flow [2022-07-19 21:00:39,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=166, PETRI_TRANSITIONS=166} [2022-07-19 21:00:39,899 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -4 predicate places. [2022-07-19 21:00:39,900 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 166 transitions, 351 flow [2022-07-19 21:00:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2022-07-19 21:00:39,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:39,902 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:00:39,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -959432383, now seen corresponding path program 1 times [2022-07-19 21:00:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:39,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465610617] [2022-07-19 21:00:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:40,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465610617] [2022-07-19 21:00:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465610617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:40,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:00:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260732880] [2022-07-19 21:00:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:00:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:00:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:00:40,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 185 [2022-07-19 21:00:40,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 166 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-19 21:00:40,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:40,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 185 [2022-07-19 21:00:40,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:40,108 INFO L129 PetriNetUnfolder]: 21/425 cut-off events. [2022-07-19 21:00:40,108 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:00:40,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 425 events. 21/425 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1379 event pairs, 4 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-07-19 21:00:40,113 INFO L132 encePairwiseOnDemand]: 182/185 looper letters, 9 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-07-19 21:00:40,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 379 flow [2022-07-19 21:00:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:00:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:00:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-07-19 21:00:40,116 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9405405405405406 [2022-07-19 21:00:40,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-07-19 21:00:40,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-07-19 21:00:40,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:40,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-07-19 21:00:40,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2022-07-19 21:00:40,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:40,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:40,121 INFO L186 Difference]: Start difference. First operand has 166 places, 166 transitions, 351 flow. Second operand 3 states and 522 transitions. [2022-07-19 21:00:40,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 379 flow [2022-07-19 21:00:40,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 169 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:00:40,130 INFO L242 Difference]: Finished difference. Result has 168 places, 166 transitions, 356 flow [2022-07-19 21:00:40,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=168, PETRI_TRANSITIONS=166} [2022-07-19 21:00:40,132 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, -2 predicate places. [2022-07-19 21:00:40,132 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 166 transitions, 356 flow [2022-07-19 21:00:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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) [2022-07-19 21:00:40,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:40,133 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:00:40,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1579701380, now seen corresponding path program 1 times [2022-07-19 21:00:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104132948] [2022-07-19 21:00:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:40,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104132948] [2022-07-19 21:00:40,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104132948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:40,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:40,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:00:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109559929] [2022-07-19 21:00:40,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:00:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:00:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:00:40,259 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 185 [2022-07-19 21:00:40,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 166 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2022-07-19 21:00:40,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:40,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 185 [2022-07-19 21:00:40,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:40,396 INFO L129 PetriNetUnfolder]: 41/522 cut-off events. [2022-07-19 21:00:40,397 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:00:40,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 522 events. 41/522 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2035 event pairs, 13 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-07-19 21:00:40,403 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 16 selfloop transitions, 4 changer transitions 0/174 dead transitions. [2022-07-19 21:00:40,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 174 transitions, 417 flow [2022-07-19 21:00:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:00:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:00:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 681 transitions. [2022-07-19 21:00:40,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9202702702702703 [2022-07-19 21:00:40,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 681 transitions. [2022-07-19 21:00:40,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 681 transitions. [2022-07-19 21:00:40,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:40,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 681 transitions. [2022-07-19 21:00:40,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 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) [2022-07-19 21:00:40,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 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) [2022-07-19 21:00:40,413 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 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) [2022-07-19 21:00:40,413 INFO L186 Difference]: Start difference. First operand has 168 places, 166 transitions, 356 flow. Second operand 4 states and 681 transitions. [2022-07-19 21:00:40,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 174 transitions, 417 flow [2022-07-19 21:00:40,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:00:40,421 INFO L242 Difference]: Finished difference. Result has 172 places, 169 transitions, 382 flow [2022-07-19 21:00:40,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=382, PETRI_PLACES=172, PETRI_TRANSITIONS=169} [2022-07-19 21:00:40,424 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2022-07-19 21:00:40,424 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 169 transitions, 382 flow [2022-07-19 21:00:40,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 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) [2022-07-19 21:00:40,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:40,425 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:00:40,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1819207550, now seen corresponding path program 1 times [2022-07-19 21:00:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:40,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981747451] [2022-07-19 21:00:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:40,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981747451] [2022-07-19 21:00:40,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981747451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:00:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948115918] [2022-07-19 21:00:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:40,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:40,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:00:40,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:00:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:00:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:00:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:41,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:00:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:41,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948115918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:00:41,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:00:41,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:00:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710051094] [2022-07-19 21:00:41,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:00:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:00:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:00:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:00:41,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 185 [2022-07-19 21:00:41,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 169 transitions, 382 flow. Second operand has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 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) [2022-07-19 21:00:41,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:41,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 185 [2022-07-19 21:00:41,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:41,565 INFO L129 PetriNetUnfolder]: 187/1846 cut-off events. [2022-07-19 21:00:41,566 INFO L130 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-07-19 21:00:41,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 1846 events. 187/1846 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 12169 event pairs, 33 based on Foata normal form. 8/1747 useless extension candidates. Maximal degree in co-relation 1925. Up to 135 conditions per place. [2022-07-19 21:00:41,580 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 48 selfloop transitions, 14 changer transitions 0/215 dead transitions. [2022-07-19 21:00:41,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 215 transitions, 631 flow [2022-07-19 21:00:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:00:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:00:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1684 transitions. [2022-07-19 21:00:41,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9102702702702703 [2022-07-19 21:00:41,584 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1684 transitions. [2022-07-19 21:00:41,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1684 transitions. [2022-07-19 21:00:41,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:41,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1684 transitions. [2022-07-19 21:00:41,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 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) [2022-07-19 21:00:41,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-07-19 21:00:41,594 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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) [2022-07-19 21:00:41,594 INFO L186 Difference]: Start difference. First operand has 172 places, 169 transitions, 382 flow. Second operand 10 states and 1684 transitions. [2022-07-19 21:00:41,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 215 transitions, 631 flow [2022-07-19 21:00:41,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 215 transitions, 629 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:00:41,600 INFO L242 Difference]: Finished difference. Result has 183 places, 182 transitions, 474 flow [2022-07-19 21:00:41,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=183, PETRI_TRANSITIONS=182} [2022-07-19 21:00:41,601 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-07-19 21:00:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 182 transitions, 474 flow [2022-07-19 21:00:41,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.5) internal successors, (1645), 10 states have internal predecessors, (1645), 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) [2022-07-19 21:00:41,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:41,603 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:41,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:00:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:41,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1038169264, now seen corresponding path program 1 times [2022-07-19 21:00:41,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:41,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443577895] [2022-07-19 21:00:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:41,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:41,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:41,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443577895] [2022-07-19 21:00:41,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443577895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:41,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:41,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:00:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879624745] [2022-07-19 21:00:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:00:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:00:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:00:41,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 185 [2022-07-19 21:00:41,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 182 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2022-07-19 21:00:41,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:41,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 185 [2022-07-19 21:00:41,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:42,034 INFO L129 PetriNetUnfolder]: 53/1081 cut-off events. [2022-07-19 21:00:42,035 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-19 21:00:42,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1081 events. 53/1081 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4704 event pairs, 10 based on Foata normal form. 11/1047 useless extension candidates. Maximal degree in co-relation 843. Up to 46 conditions per place. [2022-07-19 21:00:42,041 INFO L132 encePairwiseOnDemand]: 181/185 looper letters, 12 selfloop transitions, 4 changer transitions 0/179 dead transitions. [2022-07-19 21:00:42,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 485 flow [2022-07-19 21:00:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:00:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:00:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-07-19 21:00:42,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9135135135135135 [2022-07-19 21:00:42,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-07-19 21:00:42,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-07-19 21:00:42,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:42,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-07-19 21:00:42,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-07-19 21:00:42,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:42,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2022-07-19 21:00:42,047 INFO L186 Difference]: Start difference. First operand has 183 places, 182 transitions, 474 flow. Second operand 3 states and 507 transitions. [2022-07-19 21:00:42,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 485 flow [2022-07-19 21:00:42,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 179 transitions, 473 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-19 21:00:42,053 INFO L242 Difference]: Finished difference. Result has 183 places, 177 transitions, 442 flow [2022-07-19 21:00:42,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-07-19 21:00:42,054 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2022-07-19 21:00:42,054 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 442 flow [2022-07-19 21:00:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2022-07-19 21:00:42,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:42,055 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:42,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:00:42,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 769384455, now seen corresponding path program 1 times [2022-07-19 21:00:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567375560] [2022-07-19 21:00:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:42,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:42,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567375560] [2022-07-19 21:00:42,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567375560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:42,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:42,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:00:42,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668315744] [2022-07-19 21:00:42,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:42,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:00:42,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:00:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:00:42,168 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 185 [2022-07-19 21:00:42,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 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) [2022-07-19 21:00:42,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:42,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 185 [2022-07-19 21:00:42,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:42,408 INFO L129 PetriNetUnfolder]: 119/1236 cut-off events. [2022-07-19 21:00:42,408 INFO L130 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-07-19 21:00:42,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 1236 events. 119/1236 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6102 event pairs, 19 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 1239. Up to 178 conditions per place. [2022-07-19 21:00:42,415 INFO L132 encePairwiseOnDemand]: 174/185 looper letters, 49 selfloop transitions, 13 changer transitions 0/205 dead transitions. [2022-07-19 21:00:42,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 205 transitions, 651 flow [2022-07-19 21:00:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:00:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:00:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1425 transitions. [2022-07-19 21:00:42,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8558558558558559 [2022-07-19 21:00:42,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1425 transitions. [2022-07-19 21:00:42,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1425 transitions. [2022-07-19 21:00:42,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:42,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1425 transitions. [2022-07-19 21:00:42,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.33333333333334) internal successors, (1425), 9 states have internal predecessors, (1425), 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) [2022-07-19 21:00:42,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-07-19 21:00:42,426 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 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) [2022-07-19 21:00:42,426 INFO L186 Difference]: Start difference. First operand has 183 places, 177 transitions, 442 flow. Second operand 9 states and 1425 transitions. [2022-07-19 21:00:42,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 205 transitions, 651 flow [2022-07-19 21:00:42,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 205 transitions, 647 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:00:42,432 INFO L242 Difference]: Finished difference. Result has 195 places, 184 transitions, 526 flow [2022-07-19 21:00:42,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=195, PETRI_TRANSITIONS=184} [2022-07-19 21:00:42,433 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 25 predicate places. [2022-07-19 21:00:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 184 transitions, 526 flow [2022-07-19 21:00:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 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) [2022-07-19 21:00:42,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:42,434 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:42,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:00:42,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1194335221, now seen corresponding path program 1 times [2022-07-19 21:00:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:42,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147452390] [2022-07-19 21:00:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147452390] [2022-07-19 21:00:43,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147452390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:43,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:43,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-19 21:00:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191858608] [2022-07-19 21:00:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:43,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:00:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:00:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:00:43,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 185 [2022-07-19 21:00:43,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 184 transitions, 526 flow. Second operand has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 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) [2022-07-19 21:00:43,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:43,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 185 [2022-07-19 21:00:43,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:46,428 INFO L129 PetriNetUnfolder]: 1048/4073 cut-off events. [2022-07-19 21:00:46,428 INFO L130 PetriNetUnfolder]: For 605/608 co-relation queries the response was YES. [2022-07-19 21:00:46,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 4073 events. 1048/4073 cut-off events. For 605/608 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 29516 event pairs, 351 based on Foata normal form. 5/3948 useless extension candidates. Maximal degree in co-relation 4256. Up to 1516 conditions per place. [2022-07-19 21:00:46,456 INFO L132 encePairwiseOnDemand]: 148/185 looper letters, 281 selfloop transitions, 43 changer transitions 5/418 dead transitions. [2022-07-19 21:00:46,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 418 transitions, 1787 flow [2022-07-19 21:00:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:00:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:00:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3665 transitions. [2022-07-19 21:00:46,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5503003003003003 [2022-07-19 21:00:46,465 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3665 transitions. [2022-07-19 21:00:46,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3665 transitions. [2022-07-19 21:00:46,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:46,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3665 transitions. [2022-07-19 21:00:46,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.80555555555556) internal successors, (3665), 36 states have internal predecessors, (3665), 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) [2022-07-19 21:00:46,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 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) [2022-07-19 21:00:46,519 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 185.0) internal successors, (6845), 37 states have internal predecessors, (6845), 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) [2022-07-19 21:00:46,519 INFO L186 Difference]: Start difference. First operand has 195 places, 184 transitions, 526 flow. Second operand 36 states and 3665 transitions. [2022-07-19 21:00:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 418 transitions, 1787 flow [2022-07-19 21:00:46,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 418 transitions, 1776 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:00:46,529 INFO L242 Difference]: Finished difference. Result has 254 places, 220 transitions, 841 flow [2022-07-19 21:00:46,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=841, PETRI_PLACES=254, PETRI_TRANSITIONS=220} [2022-07-19 21:00:46,530 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 84 predicate places. [2022-07-19 21:00:46,530 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 220 transitions, 841 flow [2022-07-19 21:00:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 95.57142857142857) internal successors, (2676), 28 states have internal predecessors, (2676), 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) [2022-07-19 21:00:46,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:46,532 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:46,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:00:46,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1145094813, now seen corresponding path program 2 times [2022-07-19 21:00:46,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:46,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460789279] [2022-07-19 21:00:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:00:47,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460789279] [2022-07-19 21:00:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460789279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:47,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:47,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-19 21:00:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050390339] [2022-07-19 21:00:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 21:00:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 21:00:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-19 21:00:47,443 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 185 [2022-07-19 21:00:47,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 220 transitions, 841 flow. Second operand has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 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) [2022-07-19 21:00:47,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:47,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 185 [2022-07-19 21:00:47,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:52,719 INFO L129 PetriNetUnfolder]: 1419/5642 cut-off events. [2022-07-19 21:00:52,720 INFO L130 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2022-07-19 21:00:52,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11906 conditions, 5642 events. 1419/5642 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 43147 event pairs, 122 based on Foata normal form. 16/5566 useless extension candidates. Maximal degree in co-relation 10056. Up to 1303 conditions per place. [2022-07-19 21:00:52,774 INFO L132 encePairwiseOnDemand]: 151/185 looper letters, 334 selfloop transitions, 89 changer transitions 7/519 dead transitions. [2022-07-19 21:00:52,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 519 transitions, 2707 flow [2022-07-19 21:00:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 21:00:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-19 21:00:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5562 transitions. [2022-07-19 21:00:52,786 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5466339066339067 [2022-07-19 21:00:52,788 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5562 transitions. [2022-07-19 21:00:52,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5562 transitions. [2022-07-19 21:00:52,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:52,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5562 transitions. [2022-07-19 21:00:52,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 101.12727272727273) internal successors, (5562), 55 states have internal predecessors, (5562), 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) [2022-07-19 21:00:52,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 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) [2022-07-19 21:00:52,870 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 185.0) internal successors, (10360), 56 states have internal predecessors, (10360), 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) [2022-07-19 21:00:52,870 INFO L186 Difference]: Start difference. First operand has 254 places, 220 transitions, 841 flow. Second operand 55 states and 5562 transitions. [2022-07-19 21:00:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 519 transitions, 2707 flow [2022-07-19 21:00:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 519 transitions, 2685 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-07-19 21:00:52,891 INFO L242 Difference]: Finished difference. Result has 339 places, 270 transitions, 1475 flow [2022-07-19 21:00:52,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1475, PETRI_PLACES=339, PETRI_TRANSITIONS=270} [2022-07-19 21:00:52,894 INFO L279 CegarLoopForPetriNet]: 170 programPoint places, 169 predicate places. [2022-07-19 21:00:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 270 transitions, 1475 flow [2022-07-19 21:00:52,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.66666666666667) internal successors, (2610), 27 states have internal predecessors, (2610), 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) [2022-07-19 21:00:52,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:52,897 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:52,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:00:52,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:00:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:52,898 INFO L85 PathProgramCache]: Analyzing trace with hash -825862227, now seen corresponding path program 1 times [2022-07-19 21:00:52,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:52,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033374149] [2022-07-19 21:00:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:52,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:00:52,932 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:00:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:00:53,001 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:00:53,001 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:00:53,002 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-07-19 21:00:53,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-07-19 21:00:53,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-19 21:00:53,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:00:53,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:00:53,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:00:53,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:00:53,005 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:53,010 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:00:53,011 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:00:53,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:00:53 BasicIcfg [2022-07-19 21:00:53,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:00:53,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:00:53,154 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:00:53,154 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:00:53,154 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:00:38" (3/4) ... [2022-07-19 21:00:53,156 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 21:00:53,278 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:00:53,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:00:53,279 INFO L158 Benchmark]: Toolchain (without parser) took 15549.08ms. Allocated memory was 92.3MB in the beginning and 434.1MB in the end (delta: 341.8MB). Free memory was 57.5MB in the beginning and 289.7MB in the end (delta: -232.2MB). Peak memory consumption was 215.9MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,280 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 46.5MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:00:53,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 575.01ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 48.7MB in the end (delta: 8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,280 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.13ms. Allocated memory is still 92.3MB. Free memory was 48.7MB in the beginning and 45.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,281 INFO L158 Benchmark]: Boogie Preprocessor took 26.81ms. Allocated memory is still 92.3MB. Free memory was 45.9MB in the beginning and 44.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,281 INFO L158 Benchmark]: RCFGBuilder took 475.48ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 44.2MB in the beginning and 79.6MB in the end (delta: -35.4MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,281 INFO L158 Benchmark]: TraceAbstraction took 14292.04ms. Allocated memory was 111.1MB in the beginning and 306.2MB in the end (delta: 195.0MB). Free memory was 79.1MB in the beginning and 98.9MB in the end (delta: -19.8MB). Peak memory consumption was 176.3MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,282 INFO L158 Benchmark]: Witness Printer took 125.16ms. Allocated memory was 306.2MB in the beginning and 434.1MB in the end (delta: 127.9MB). Free memory was 98.9MB in the beginning and 289.7MB in the end (delta: -190.8MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2022-07-19 21:00:53,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 46.5MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 575.01ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 48.7MB in the end (delta: 8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.13ms. Allocated memory is still 92.3MB. Free memory was 48.7MB in the beginning and 45.9MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.81ms. Allocated memory is still 92.3MB. Free memory was 45.9MB in the beginning and 44.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.48ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 44.2MB in the beginning and 79.6MB in the end (delta: -35.4MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. * TraceAbstraction took 14292.04ms. Allocated memory was 111.1MB in the beginning and 306.2MB in the end (delta: 195.0MB). Free memory was 79.1MB in the beginning and 98.9MB in the end (delta: -19.8MB). Peak memory consumption was 176.3MB. Max. memory is 16.1GB. * Witness Printer took 125.16ms. Allocated memory was 306.2MB in the beginning and 434.1MB in the end (delta: 127.9MB). Free memory was 98.9MB in the beginning and 289.7MB in the end (delta: -190.8MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(5)]; VAL [arr={5:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={5:0}, m={6:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={5:0}, flag=0, m={6:0}, top=0] [L1021] 0 pthread_t id1, id2; VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L991] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, m={6:0}, top=0] [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L992] COND TRUE 1 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, top=0] [L995] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967300, arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, tmp=4, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={5:0}, flag=0, id1={9:0}, id2={7:0}, m={6:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={5:0}, cond=1, flag=0, m={6:0}, top=0] [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=4, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; VAL [\result=0, arr={5:0}, flag=0, m={6:0}, top=0] [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=4, arr={5:0}, flag=0, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0, x=4] [L970] CALL 1 inc_top() [L946] 1 top++ VAL [arr={5:0}, flag=0, m={6:0}, top=1] [L970] RET 1 inc_top() [L972] 1 return 0; VAL [\old(x)=4, \result=0, arr={5:0}, flag=0, m={6:0}, stack={5:0}, stack={5:0}, top=1, x=4] [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=0, i=0, m={6:0}, push(arr,tmp)=0, tmp=4, top=1] [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, tmp=4, top=1] [L1006] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, m={6:0}, top=1] [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, top=1] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={5:0}, flag=1, m={6:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) VAL [arr={5:0}, flag=1, get_top()=1, m={6:0}, stack={5:0}, stack={5:0}, top=1] [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={5:0}, flag=1, m={6:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L984] 2 return stack[get_top()]; VAL [\result=4, arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, stack[get_top()]=4, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=0, m={6:0}, pop(arr)=4, top=0] [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1007] COND TRUE 2 i<(5) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1010] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, top=0] [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=0, arr={5:0}, flag=1, m={6:0}, top=0] [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 VAL [arr={5:0}, flag=1, get_top()=0, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L979] 2 return (-2); VAL [\result=-2, arr={5:0}, flag=1, m={6:0}, stack={5:0}, stack={5:0}, top=0] [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={5:0}, flag=1, i=1, m={6:0}, pop(arr)=-2, top=0] [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={5:0}, flag=1, m={6:0}, top=0] - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 294 locations, 6 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: 14.0s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1341 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1341 mSDsluCounter, 3196 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3564 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5113 IncrementalHoareTripleChecker+Invalid, 5190 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 237 mSDtfsCounter, 5113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1475occurred in iteration=8, InterpolantAutomatonStates: 123, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1092 NumberOfCodeBlocks, 1092 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1035 ConstructedInterpolants, 0 QuantifiedInterpolants, 6790 SizeOfPredicates, 2 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 12/66 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 RESULT: Ultimate proved your program to be incorrect! [2022-07-19 21:00:53,317 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE