./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/17_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-ext/17_szymanski.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 9d000bd3a81a7401f4ccb21c2696e2644e9236d2ccbd2094291c987ec91aaa92 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:18:10,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:18:10,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:18:10,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:18:10,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:18:10,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:18:10,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:18:10,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:18:10,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:18:10,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:18:10,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:18:10,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:18:10,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:18:10,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:18:10,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:18:10,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:18:10,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:18:10,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:18:10,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:18:10,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:18:10,539 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:18:10,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:18:10,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:18:10,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:18:10,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:18:10,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:18:10,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:18:10,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:18:10,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:18:10,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:18:10,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:18:10,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:18:10,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:18:10,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:18:10,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:18:10,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:18:10,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:18:10,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:18:10,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:18:10,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:18:10,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:18:10,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:18:10,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:18:10,591 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:18:10,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:18:10,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:18:10,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:18:10,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:18:10,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:18:10,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:18:10,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:18:10,595 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:18:10,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:18:10,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:18:10,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:18:10,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:18:10,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:18:10,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:18:10,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:18:10,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:18:10,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:18:10,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:18:10,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:18:10,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:18:10,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:18:10,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:18:10,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:18:10,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:10,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:18:10,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:18:10,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:18:10,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:18:10,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:18:10,600 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:18:10,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:18:10,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:18:10,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d000bd3a81a7401f4ccb21c2696e2644e9236d2ccbd2094291c987ec91aaa92 [2022-07-22 21:18:10,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:18:10,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:18:10,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:18:10,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:18:10,847 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:18:10,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/17_szymanski.i [2022-07-22 21:18:10,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165d541d9/4caa926a4c8f48ab87c6591a498d5b7f/FLAG081f75630 [2022-07-22 21:18:11,365 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:18:11,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/17_szymanski.i [2022-07-22 21:18:11,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165d541d9/4caa926a4c8f48ab87c6591a498d5b7f/FLAG081f75630 [2022-07-22 21:18:11,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/165d541d9/4caa926a4c8f48ab87c6591a498d5b7f [2022-07-22 21:18:11,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:18:11,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:18:11,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:11,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:18:11,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:18:11,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:11" (1/1) ... [2022-07-22 21:18:11,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3128a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:11, skipping insertion in model container [2022-07-22 21:18:11,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:11" (1/1) ... [2022-07-22 21:18:11,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:18:11,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:18:12,029 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-ext/17_szymanski.i[30132,30145] [2022-07-22 21:18:12,040 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-ext/17_szymanski.i[30481,30494] [2022-07-22 21:18:12,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:12,052 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:18:12,101 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-ext/17_szymanski.i[30132,30145] [2022-07-22 21:18:12,104 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-ext/17_szymanski.i[30481,30494] [2022-07-22 21:18:12,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:12,139 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:18:12,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12 WrapperNode [2022-07-22 21:18:12,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:12,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:12,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:18:12,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:18:12,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,172 INFO L137 Inliner]: procedures = 167, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-07-22 21:18:12,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:12,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:18:12,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:18:12,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:18:12,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:18:12,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:18:12,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:18:12,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:18:12,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (1/1) ... [2022-07-22 21:18:12,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:18:12,245 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) [2022-07-22 21:18:12,247 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 [2022-07-22 21:18:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:18:12,273 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:18:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:18:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:18:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:18:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:18:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:18:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:18:12,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:18:12,277 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:18:12,389 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:18:12,390 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:18:12,535 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:18:12,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:18:12,542 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 21:18:12,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:12 BoogieIcfgContainer [2022-07-22 21:18:12,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:18:12,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:18:12,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:18:12,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:18:12,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:18:11" (1/3) ... [2022-07-22 21:18:12,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71532650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:12, skipping insertion in model container [2022-07-22 21:18:12,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:12" (2/3) ... [2022-07-22 21:18:12,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71532650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:12, skipping insertion in model container [2022-07-22 21:18:12,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:12" (3/3) ... [2022-07-22 21:18:12,555 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2022-07-22 21:18:12,561 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:18:12,569 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:18:12,570 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:18:12,570 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:18:12,606 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:12,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 97 transitions, 199 flow [2022-07-22 21:18:12,671 INFO L129 PetriNetUnfolder]: 24/96 cut-off events. [2022-07-22 21:18:12,673 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:12,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 96 events. 24/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 76. Up to 3 conditions per place. [2022-07-22 21:18:12,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 97 transitions, 199 flow [2022-07-22 21:18:12,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 96 transitions, 195 flow [2022-07-22 21:18:12,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:12,714 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@4e7c61d9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1515b20e [2022-07-22 21:18:12,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:18:12,734 INFO L129 PetriNetUnfolder]: 13/62 cut-off events. [2022-07-22 21:18:12,738 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:12,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:12,740 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] [2022-07-22 21:18:12,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:18:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1429919175, now seen corresponding path program 1 times [2022-07-22 21:18:12,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019544245] [2022-07-22 21:18:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:12,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019544245] [2022-07-22 21:18:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019544245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:12,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:12,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:18:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819126224] [2022-07-22 21:18:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:12,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:18:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:18:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:18:13,023 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-07-22 21:18:13,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 96 transitions, 195 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-07-22 21:18:13,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-07-22 21:18:13,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:13,053 INFO L129 PetriNetUnfolder]: 12/68 cut-off events. [2022-07-22 21:18:13,053 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:13,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 68 events. 12/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 12/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-07-22 21:18:13,055 INFO L132 encePairwiseOnDemand]: 83/97 looper letters, 1 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2022-07-22 21:18:13,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 141 flow [2022-07-22 21:18:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:18:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:18:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 175 transitions. [2022-07-22 21:18:13,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9020618556701031 [2022-07-22 21:18:13,067 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 175 transitions. [2022-07-22 21:18:13,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 175 transitions. [2022-07-22 21:18:13,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:13,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 175 transitions. [2022-07-22 21:18:13,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 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) [2022-07-22 21:18:13,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-07-22 21:18:13,081 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-07-22 21:18:13,083 INFO L186 Difference]: Start difference. First operand has 76 places, 96 transitions, 195 flow. Second operand 2 states and 175 transitions. [2022-07-22 21:18:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 141 flow [2022-07-22 21:18:13,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:13,088 INFO L242 Difference]: Finished difference. Result has 60 places, 68 transitions, 138 flow [2022-07-22 21:18:13,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2022-07-22 21:18:13,093 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -16 predicate places. [2022-07-22 21:18:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 138 flow [2022-07-22 21:18:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2022-07-22 21:18:13,094 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:13,094 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] [2022-07-22 21:18:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:18:13,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:18:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1429889384, now seen corresponding path program 1 times [2022-07-22 21:18:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291985687] [2022-07-22 21:18:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:13,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291985687] [2022-07-22 21:18:13,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291985687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:13,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:13,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339173457] [2022-07-22 21:18:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:13,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:13,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:18:13,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:18:13,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:13,212 INFO L129 PetriNetUnfolder]: 56/195 cut-off events. [2022-07-22 21:18:13,212 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:13,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 56/195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 499 event pairs, 2 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 235. Up to 24 conditions per place. [2022-07-22 21:18:13,215 INFO L132 encePairwiseOnDemand]: 92/97 looper letters, 9 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-07-22 21:18:13,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 170 flow [2022-07-22 21:18:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-07-22 21:18:13,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8006872852233677 [2022-07-22 21:18:13,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-07-22 21:18:13,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-07-22 21:18:13,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:13,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-07-22 21:18:13,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-07-22 21:18:13,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,223 INFO L186 Difference]: Start difference. First operand has 60 places, 68 transitions, 138 flow. Second operand 3 states and 233 transitions. [2022-07-22 21:18:13,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 170 flow [2022-07-22 21:18:13,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:13,226 INFO L242 Difference]: Finished difference. Result has 64 places, 70 transitions, 162 flow [2022-07-22 21:18:13,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2022-07-22 21:18:13,227 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -12 predicate places. [2022-07-22 21:18:13,227 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 162 flow [2022-07-22 21:18:13,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,228 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:13,228 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] [2022-07-22 21:18:13,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:18:13,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:18:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash -257500694, now seen corresponding path program 1 times [2022-07-22 21:18:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082537376] [2022-07-22 21:18:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:13,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082537376] [2022-07-22 21:18:13,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082537376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:13,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:13,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282083184] [2022-07-22 21:18:13,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:13,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:13,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:13,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-22 21:18:13,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-22 21:18:13,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:13,380 INFO L129 PetriNetUnfolder]: 46/168 cut-off events. [2022-07-22 21:18:13,380 INFO L130 PetriNetUnfolder]: For 27/34 co-relation queries the response was YES. [2022-07-22 21:18:13,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 168 events. 46/168 cut-off events. For 27/34 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 374 event pairs, 2 based on Foata normal form. 8/138 useless extension candidates. Maximal degree in co-relation 229. Up to 16 conditions per place. [2022-07-22 21:18:13,387 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 8 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-07-22 21:18:13,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 182 flow [2022-07-22 21:18:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-07-22 21:18:13,392 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938144329896907 [2022-07-22 21:18:13,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-07-22 21:18:13,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-07-22 21:18:13,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:13,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-07-22 21:18:13,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-07-22 21:18:13,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,397 INFO L186 Difference]: Start difference. First operand has 64 places, 70 transitions, 162 flow. Second operand 3 states and 231 transitions. [2022-07-22 21:18:13,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 182 flow [2022-07-22 21:18:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:18:13,400 INFO L242 Difference]: Finished difference. Result has 65 places, 70 transitions, 166 flow [2022-07-22 21:18:13,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2022-07-22 21:18:13,401 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -11 predicate places. [2022-07-22 21:18:13,401 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 166 flow [2022-07-22 21:18:13,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:13,401 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] [2022-07-22 21:18:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:18:13,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:18:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2147086769, now seen corresponding path program 1 times [2022-07-22 21:18:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788801274] [2022-07-22 21:18:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:13,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:13,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788801274] [2022-07-22 21:18:13,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788801274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:13,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:13,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816194289] [2022-07-22 21:18:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:13,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:13,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-22 21:18:13,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-07-22 21:18:13,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-22 21:18:13,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:13,608 INFO L129 PetriNetUnfolder]: 267/560 cut-off events. [2022-07-22 21:18:13,609 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:18:13,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 560 events. 267/560 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2180 event pairs, 52 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 932. Up to 227 conditions per place. [2022-07-22 21:18:13,617 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 21 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2022-07-22 21:18:13,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 240 flow [2022-07-22 21:18:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-07-22 21:18:13,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7663230240549829 [2022-07-22 21:18:13,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:13,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,627 INFO L186 Difference]: Start difference. First operand has 65 places, 70 transitions, 166 flow. Second operand 3 states and 223 transitions. [2022-07-22 21:18:13,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 240 flow [2022-07-22 21:18:13,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:13,637 INFO L242 Difference]: Finished difference. Result has 68 places, 75 transitions, 216 flow [2022-07-22 21:18:13,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2022-07-22 21:18:13,639 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -8 predicate places. [2022-07-22 21:18:13,640 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 216 flow [2022-07-22 21:18:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-07-22 21:18:13,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:13,641 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] [2022-07-22 21:18:13,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:18:13,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:18:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2063838827, now seen corresponding path program 2 times [2022-07-22 21:18:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021444035] [2022-07-22 21:18:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:13,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021444035] [2022-07-22 21:18:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021444035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:13,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:13,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471842272] [2022-07-22 21:18:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:13,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-22 21:18:13,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-07-22 21:18:13,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-22 21:18:13,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:13,828 INFO L129 PetriNetUnfolder]: 324/644 cut-off events. [2022-07-22 21:18:13,829 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-22 21:18:13,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 644 events. 324/644 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2545 event pairs, 62 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 1241. Up to 219 conditions per place. [2022-07-22 21:18:13,833 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 0 selfloop transitions, 0 changer transitions 80/80 dead transitions. [2022-07-22 21:18:13,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 274 flow [2022-07-22 21:18:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-07-22 21:18:13,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7663230240549829 [2022-07-22 21:18:13,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:13,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-07-22 21:18:13,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2022-07-22 21:18:13,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2022-07-22 21:18:13,837 INFO L186 Difference]: Start difference. First operand has 68 places, 75 transitions, 216 flow. Second operand 3 states and 223 transitions. [2022-07-22 21:18:13,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 274 flow [2022-07-22 21:18:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:18:13,842 INFO L242 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2022-07-22 21:18:13,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2022-07-22 21:18:13,843 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -12 predicate places. [2022-07-22 21:18:13,843 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2022-07-22 21:18:13,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2022-07-22 21:18:13,846 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-22 21:18:13,846 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:18:13,846 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-22 21:18:13,846 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:18:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:18:13,847 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-22 21:18:13,852 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-22 21:18:13,852 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:18:13,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:18:13 BasicIcfg [2022-07-22 21:18:13,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:18:13,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:18:13,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:18:13,857 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:18:13,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:12" (3/4) ... [2022-07-22 21:18:13,860 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 21:18:13,865 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2022-07-22 21:18:13,868 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-07-22 21:18:13,868 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-22 21:18:13,869 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-22 21:18:13,869 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 21:18:13,897 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:18:13,900 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:18:13,901 INFO L158 Benchmark]: Toolchain (without parser) took 2198.96ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 47.9MB in the beginning and 58.5MB in the end (delta: -10.6MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,901 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 47.2MB in the beginning and 47.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:18:13,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.05ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 47.7MB in the beginning and 77.1MB in the end (delta: -29.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,905 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.55ms. Allocated memory is still 104.9MB. Free memory was 77.1MB in the beginning and 75.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,905 INFO L158 Benchmark]: Boogie Preprocessor took 40.57ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 73.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:18:13,906 INFO L158 Benchmark]: RCFGBuilder took 328.87ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 61.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,906 INFO L158 Benchmark]: TraceAbstraction took 1311.50ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: -63.8kB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,906 INFO L158 Benchmark]: Witness Printer took 42.94ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 58.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:18:13,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 47.2MB in the beginning and 47.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 437.05ms. Allocated memory was 81.8MB in the beginning and 104.9MB in the end (delta: 23.1MB). Free memory was 47.7MB in the beginning and 77.1MB in the end (delta: -29.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.55ms. Allocated memory is still 104.9MB. Free memory was 77.1MB in the beginning and 75.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.57ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 73.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 328.87ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 61.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1311.50ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: -63.8kB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. * Witness Printer took 42.94ms. Allocated memory is still 104.9MB. Free memory was 61.3MB in the beginning and 58.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 95 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66 IncrementalHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 51 mSDtfsCounter, 66 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=4, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 236 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-22 21:18:13,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE