./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:01:43,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:01:43,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:01:43,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:01:43,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:01:43,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:01:43,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:01:43,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:01:43,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:01:43,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:01:43,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:01:43,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:01:43,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:01:43,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:01:43,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:01:43,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:01:43,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:01:43,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:01:43,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:01:43,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:01:43,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:01:43,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:01:43,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:01:43,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:01:43,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:01:43,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:01:43,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:01:43,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:01:43,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:01:43,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:01:43,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:01:43,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:01:43,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:01:43,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:01:43,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:01:43,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:01:43,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:01:43,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:01:43,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:01:43,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:01:43,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:01:43,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:01:43,415 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:01:43,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:01:43,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:01:43,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:01:43,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:01:43,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:01:43,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:01:43,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:01:43,418 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:01:43,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:01:43,419 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:01:43,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:01:43,420 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:01:43,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:01:43,421 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:01:43,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:01:43,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:01:43,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:01:43,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:01:43,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:01:43,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:01:43,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:01:43,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:01:43,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:01:43,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:01:43,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:01:43,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:01:43,424 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:01:43,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:01:43,424 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:01:43,424 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:01:43,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:01:43,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:01:43,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:01:43,755 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:01:43,756 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:01:43,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-09-01 09:01:44,859 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:01:45,158 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:01:45,158 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-09-01 09:01:45,181 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea227576/6e25e9985d30457eb12e3ce2bed415c1/FLAGbf1e253fc [2023-09-01 09:01:45,201 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea227576/6e25e9985d30457eb12e3ce2bed415c1 [2023-09-01 09:01:45,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:01:45,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:01:45,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:01:45,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:01:45,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:01:45,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fab0830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45, skipping insertion in model container [2023-09-01 09:01:45,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:01:45,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:01:45,680 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-09-01 09:01:45,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:01:45,737 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:01:45,788 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-09-01 09:01:45,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:01:45,877 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:01:45,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45 WrapperNode [2023-09-01 09:01:45,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:01:45,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:01:45,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:01:45,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:01:45,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,927 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-09-01 09:01:45,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:01:45,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:01:45,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:01:45,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:01:45,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,954 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:01:45,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:01:45,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:01:45,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:01:45,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (1/1) ... [2023-09-01 09:01:45,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:01:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:01:45,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 09:01:46,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 09:01:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 09:01:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 09:01:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 09:01:46,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:01:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:01:46,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:01:46,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:01:46,027 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:01:46,137 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:01:46,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:01:46,368 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:01:46,388 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:01:46,389 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:01:46,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:46 BoogieIcfgContainer [2023-09-01 09:01:46,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:01:46,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:01:46,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:01:46,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:01:46,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:01:45" (1/3) ... [2023-09-01 09:01:46,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f8eb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:01:46, skipping insertion in model container [2023-09-01 09:01:46,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:01:45" (2/3) ... [2023-09-01 09:01:46,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f8eb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:01:46, skipping insertion in model container [2023-09-01 09:01:46,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:46" (3/3) ... [2023-09-01 09:01:46,398 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-09-01 09:01:46,405 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:01:46,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:01:46,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 09:01:46,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:01:46,563 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 09:01:46,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 162 transitions, 340 flow [2023-09-01 09:01:46,679 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2023-09-01 09:01:46,679 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:01:46,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 10/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 379 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-09-01 09:01:46,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 162 transitions, 340 flow [2023-09-01 09:01:46,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 151 transitions, 311 flow [2023-09-01 09:01:46,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:01:46,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 151 transitions, 311 flow [2023-09-01 09:01:46,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 151 transitions, 311 flow [2023-09-01 09:01:46,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 151 transitions, 311 flow [2023-09-01 09:01:46,768 INFO L130 PetriNetUnfolder]: 10/151 cut-off events. [2023-09-01 09:01:46,769 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:01:46,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 151 events. 10/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 311 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-09-01 09:01:46,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-09-01 09:01:50,599 INFO L134 LiptonReduction]: Checked pairs total: 9688 [2023-09-01 09:01:50,600 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-09-01 09:01:50,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:01:50,618 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6175d9e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:01:50,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-09-01 09:01:50,623 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-09-01 09:01:50,623 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 09:01:50,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:50,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 09:01:50,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:50,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2091505467, now seen corresponding path program 1 times [2023-09-01 09:01:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:50,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177739858] [2023-09-01 09:01:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:50,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177739858] [2023-09-01 09:01:50,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177739858] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:50,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:01:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222223497] [2023-09-01 09:01:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:50,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:01:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:01:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:01:51,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 303 [2023-09-01 09:01:51,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:51,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 303 [2023-09-01 09:01:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:51,259 INFO L130 PetriNetUnfolder]: 839/1372 cut-off events. [2023-09-01 09:01:51,260 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 09:01:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 1372 events. 839/1372 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5785 event pairs, 240 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2556. Up to 772 conditions per place. [2023-09-01 09:01:51,268 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-09-01 09:01:51,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-09-01 09:01:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:01:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:01:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-09-01 09:01:51,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511551155115512 [2023-09-01 09:01:51,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-09-01 09:01:51,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-09-01 09:01:51,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:51,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-09-01 09:01:51,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,312 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 501 transitions. [2023-09-01 09:01:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-09-01 09:01:51,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 09:01:51,317 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-09-01 09:01:51,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-09-01 09:01:51,322 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-09-01 09:01:51,322 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-09-01 09:01:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:51,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:01:51,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:51,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 985591015, now seen corresponding path program 1 times [2023-09-01 09:01:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:51,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154036704] [2023-09-01 09:01:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154036704] [2023-09-01 09:01:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154036704] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:51,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:51,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:01:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975743358] [2023-09-01 09:01:51,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:51,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:01:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:01:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:01:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 303 [2023-09-01 09:01:51,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:51,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 303 [2023-09-01 09:01:51,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:51,633 INFO L130 PetriNetUnfolder]: 897/1480 cut-off events. [2023-09-01 09:01:51,634 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-09-01 09:01:51,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 1480 events. 897/1480 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6152 event pairs, 398 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2952. Up to 1184 conditions per place. [2023-09-01 09:01:51,641 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-09-01 09:01:51,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-09-01 09:01:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:01:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:01:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-09-01 09:01:51,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5445544554455446 [2023-09-01 09:01:51,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-09-01 09:01:51,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-09-01 09:01:51,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:51,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-09-01 09:01:51,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 09:01:51,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,651 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 495 transitions. [2023-09-01 09:01:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-09-01 09:01:51,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:01:51,655 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-09-01 09:01:51,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-09-01 09:01:51,656 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-09-01 09:01:51,656 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-09-01 09:01:51,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:51,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:01:51,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:51,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1796788492, now seen corresponding path program 1 times [2023-09-01 09:01:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:51,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637464432] [2023-09-01 09:01:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637464432] [2023-09-01 09:01:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637464432] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:01:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927775287] [2023-09-01 09:01:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:01:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:01:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:01:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 303 [2023-09-01 09:01:51,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:51,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 303 [2023-09-01 09:01:51,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:51,950 INFO L130 PetriNetUnfolder]: 953/1566 cut-off events. [2023-09-01 09:01:51,951 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-09-01 09:01:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1566 events. 953/1566 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6650 event pairs, 659 based on Foata normal form. 56/1460 useless extension candidates. Maximal degree in co-relation 3214. Up to 1397 conditions per place. [2023-09-01 09:01:51,959 INFO L137 encePairwiseOnDemand]: 300/303 looper letters, 52 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-09-01 09:01:51,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 270 flow [2023-09-01 09:01:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:01:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:01:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-09-01 09:01:51,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412541254125413 [2023-09-01 09:01:51,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-09-01 09:01:51,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-09-01 09:01:51,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:51,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-09-01 09:01:51,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,966 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 492 transitions. [2023-09-01 09:01:51,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 270 flow [2023-09-01 09:01:51,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:01:51,968 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-09-01 09:01:51,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-09-01 09:01:51,969 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-09-01 09:01:51,969 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-09-01 09:01:51,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:51,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:51,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:51,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:01:51,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:51,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1638577751, now seen corresponding path program 1 times [2023-09-01 09:01:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378121668] [2023-09-01 09:01:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:52,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:52,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378121668] [2023-09-01 09:01:52,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378121668] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:01:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244550044] [2023-09-01 09:01:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:01:52,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:01:52,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 09:01:52,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 09:01:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:52,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 09:01:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:01:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:52,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:01:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244550044] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:01:52,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:01:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-09-01 09:01:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051953408] [2023-09-01 09:01:52,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:01:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 09:01:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 09:01:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 09:01:52,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-09-01 09:01:52,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:52,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:52,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-09-01 09:01:52,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:52,910 INFO L130 PetriNetUnfolder]: 1986/3223 cut-off events. [2023-09-01 09:01:52,910 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-09-01 09:01:52,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 3223 events. 1986/3223 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15001 event pairs, 399 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 7184. Up to 909 conditions per place. [2023-09-01 09:01:52,928 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2023-09-01 09:01:52,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 195 transitions, 934 flow [2023-09-01 09:01:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 09:01:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 09:01:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1634 transitions. [2023-09-01 09:01:52,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392739273927393 [2023-09-01 09:01:52,933 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1634 transitions. [2023-09-01 09:01:52,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1634 transitions. [2023-09-01 09:01:52,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:52,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1634 transitions. [2023-09-01 09:01:52,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.4) internal successors, (1634), 10 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:52,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:52,945 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 303.0) internal successors, (3333), 11 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:52,945 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1634 transitions. [2023-09-01 09:01:52,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 195 transitions, 934 flow [2023-09-01 09:01:52,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 195 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:01:52,953 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-09-01 09:01:52,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-09-01 09:01:52,954 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-09-01 09:01:52,955 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-09-01 09:01:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:52,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:52,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:52,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 09:01:53,164 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 [2023-09-01 09:01:53,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:53,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1568042570, now seen corresponding path program 1 times [2023-09-01 09:01:53,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:53,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922085125] [2023-09-01 09:01:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922085125] [2023-09-01 09:01:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922085125] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:53,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:53,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:01:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967147370] [2023-09-01 09:01:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:53,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 09:01:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 09:01:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 09:01:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 303 [2023-09-01 09:01:53,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:53,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 303 [2023-09-01 09:01:53,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:53,434 INFO L130 PetriNetUnfolder]: 606/1135 cut-off events. [2023-09-01 09:01:53,434 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-09-01 09:01:53,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1135 events. 606/1135 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4845 event pairs, 98 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 2292. Up to 850 conditions per place. [2023-09-01 09:01:53,440 INFO L137 encePairwiseOnDemand]: 298/303 looper letters, 47 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-09-01 09:01:53,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 331 flow [2023-09-01 09:01:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 09:01:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 09:01:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-09-01 09:01:53,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258525852585259 [2023-09-01 09:01:53,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-09-01 09:01:53,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-09-01 09:01:53,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:53,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-09-01 09:01:53,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,447 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 478 transitions. [2023-09-01 09:01:53,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 331 flow [2023-09-01 09:01:53,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 319 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 09:01:53,452 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-09-01 09:01:53,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-09-01 09:01:53,454 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-09-01 09:01:53,455 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-09-01 09:01:53,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:53,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:01:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:01:53,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:53,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 321710418, now seen corresponding path program 1 times [2023-09-01 09:01:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:53,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069698275] [2023-09-01 09:01:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:53,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069698275] [2023-09-01 09:01:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069698275] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:53,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:53,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:01:53,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919710415] [2023-09-01 09:01:53,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:01:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:01:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:01:53,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 303 [2023-09-01 09:01:53,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:53,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 303 [2023-09-01 09:01:53,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:53,819 INFO L130 PetriNetUnfolder]: 718/1317 cut-off events. [2023-09-01 09:01:53,819 INFO L131 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2023-09-01 09:01:53,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 1317 events. 718/1317 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5602 event pairs, 236 based on Foata normal form. 18/1335 useless extension candidates. Maximal degree in co-relation 2798. Up to 702 conditions per place. [2023-09-01 09:01:53,825 INFO L137 encePairwiseOnDemand]: 297/303 looper letters, 81 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2023-09-01 09:01:53,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 95 transitions, 534 flow [2023-09-01 09:01:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 09:01:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 09:01:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 953 transitions. [2023-09-01 09:01:53,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242024202420242 [2023-09-01 09:01:53,829 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 953 transitions. [2023-09-01 09:01:53,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 953 transitions. [2023-09-01 09:01:53,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:53,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 953 transitions. [2023-09-01 09:01:53,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.83333333333334) internal successors, (953), 6 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,836 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,836 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 953 transitions. [2023-09-01 09:01:53,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 95 transitions, 534 flow [2023-09-01 09:01:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 95 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 09:01:53,840 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-09-01 09:01:53,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-09-01 09:01:53,841 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-09-01 09:01:53,841 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-09-01 09:01:53,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:53,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:53,842 INFO L208 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] [2023-09-01 09:01:53,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:01:53,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:53,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2070456889, now seen corresponding path program 1 times [2023-09-01 09:01:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790894006] [2023-09-01 09:01:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:54,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:54,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790894006] [2023-09-01 09:01:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790894006] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:54,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 09:01:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547185142] [2023-09-01 09:01:54,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:54,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 09:01:54,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 09:01:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-09-01 09:01:56,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-09-01 09:01:56,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:56,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:56,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-09-01 09:01:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:01:57,245 INFO L130 PetriNetUnfolder]: 1006/1842 cut-off events. [2023-09-01 09:01:57,246 INFO L131 PetriNetUnfolder]: For 1064/1064 co-relation queries the response was YES. [2023-09-01 09:01:57,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4739 conditions, 1842 events. 1006/1842 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8702 event pairs, 306 based on Foata normal form. 4/1828 useless extension candidates. Maximal degree in co-relation 3526. Up to 1181 conditions per place. [2023-09-01 09:01:57,255 INFO L137 encePairwiseOnDemand]: 286/303 looper letters, 136 selfloop transitions, 23 changer transitions 3/162 dead transitions. [2023-09-01 09:01:57,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 162 transitions, 917 flow [2023-09-01 09:01:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 09:01:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 09:01:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1800 transitions. [2023-09-01 09:01:57,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243281471004243 [2023-09-01 09:01:57,261 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1800 transitions. [2023-09-01 09:01:57,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1800 transitions. [2023-09-01 09:01:57,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:01:57,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1800 transitions. [2023-09-01 09:01:57,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:57,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:57,273 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:57,273 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 14 states and 1800 transitions. [2023-09-01 09:01:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 162 transitions, 917 flow [2023-09-01 09:01:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 162 transitions, 894 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 09:01:57,280 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 465 flow [2023-09-01 09:01:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=465, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-09-01 09:01:57,281 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-09-01 09:01:57,281 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 465 flow [2023-09-01 09:01:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:57,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:01:57,282 INFO L208 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] [2023-09-01 09:01:57,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:01:57,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:01:57,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:01:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash -734851743, now seen corresponding path program 2 times [2023-09-01 09:01:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:01:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024504413] [2023-09-01 09:01:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:01:57,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:01:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:01:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:01:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:01:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024504413] [2023-09-01 09:01:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024504413] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:01:58,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:01:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-09-01 09:01:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425683018] [2023-09-01 09:01:58,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:01:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 09:01:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:01:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 09:01:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-09-01 09:01:59,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-09-01 09:01:59,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 465 flow. Second operand has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:01:59,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:01:59,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-09-01 09:01:59,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:00,624 INFO L130 PetriNetUnfolder]: 1244/2276 cut-off events. [2023-09-01 09:02:00,624 INFO L131 PetriNetUnfolder]: For 1796/1796 co-relation queries the response was YES. [2023-09-01 09:02:00,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6565 conditions, 2276 events. 1244/2276 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10700 event pairs, 350 based on Foata normal form. 4/2256 useless extension candidates. Maximal degree in co-relation 4346. Up to 1108 conditions per place. [2023-09-01 09:02:00,639 INFO L137 encePairwiseOnDemand]: 287/303 looper letters, 138 selfloop transitions, 36 changer transitions 3/177 dead transitions. [2023-09-01 09:02:00,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 177 transitions, 1195 flow [2023-09-01 09:02:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 09:02:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 09:02:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1800 transitions. [2023-09-01 09:02:00,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243281471004243 [2023-09-01 09:02:00,646 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1800 transitions. [2023-09-01 09:02:00,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1800 transitions. [2023-09-01 09:02:00,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:00,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1800 transitions. [2023-09-01 09:02:00,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,661 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 303.0) internal successors, (4545), 15 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,661 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 465 flow. Second operand 14 states and 1800 transitions. [2023-09-01 09:02:00,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 177 transitions, 1195 flow [2023-09-01 09:02:00,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 177 transitions, 1191 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:00,672 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 730 flow [2023-09-01 09:02:00,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=730, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-09-01 09:02:00,674 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 65 predicate places. [2023-09-01 09:02:00,674 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 730 flow [2023-09-01 09:02:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.375) internal successors, (1910), 16 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:02:00,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:00,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:00,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:02:00,676 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-09-01 09:02:00,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2144319276, now seen corresponding path program 1 times [2023-09-01 09:02:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991728869] [2023-09-01 09:02:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:00,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:02:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:00,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:02:00,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:02:00,765 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-09-01 09:02:00,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-09-01 09:02:00,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-09-01 09:02:00,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-09-01 09:02:00,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-09-01 09:02:00,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-09-01 09:02:00,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:02:00,769 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:00,774 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:02:00,774 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:02:00,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:02:00 BasicIcfg [2023-09-01 09:02:00,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:02:00,841 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:02:00,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:02:00,841 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:02:00,842 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:01:46" (3/4) ... [2023-09-01 09:02:00,843 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-09-01 09:02:00,906 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:02:00,907 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:02:00,908 INFO L158 Benchmark]: Toolchain (without parser) took 15703.53ms. Allocated memory was 62.9MB in the beginning and 222.3MB in the end (delta: 159.4MB). Free memory was 27.6MB in the beginning and 109.9MB in the end (delta: -82.3MB). Peak memory consumption was 77.7MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,908 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:02:00,908 INFO L158 Benchmark]: CACSL2BoogieTranslator took 672.27ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 27.4MB in the beginning and 60.6MB in the end (delta: -33.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,908 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.90ms. Allocated memory is still 86.0MB. Free memory was 60.6MB in the beginning and 57.8MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,909 INFO L158 Benchmark]: Boogie Preprocessor took 33.38ms. Allocated memory is still 86.0MB. Free memory was 57.8MB in the beginning and 56.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:02:00,909 INFO L158 Benchmark]: RCFGBuilder took 428.52ms. Allocated memory is still 86.0MB. Free memory was 56.0MB in the beginning and 61.7MB in the end (delta: -5.7MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,909 INFO L158 Benchmark]: TraceAbstraction took 14448.04ms. Allocated memory was 86.0MB in the beginning and 222.3MB in the end (delta: 136.3MB). Free memory was 60.9MB in the beginning and 119.3MB in the end (delta: -58.4MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,909 INFO L158 Benchmark]: Witness Printer took 65.93ms. Allocated memory is still 222.3MB. Free memory was 119.3MB in the beginning and 109.9MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 09:02:00,911 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 62.9MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 672.27ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 27.4MB in the beginning and 60.6MB in the end (delta: -33.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.90ms. Allocated memory is still 86.0MB. Free memory was 60.6MB in the beginning and 57.8MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.38ms. Allocated memory is still 86.0MB. Free memory was 57.8MB in the beginning and 56.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 428.52ms. Allocated memory is still 86.0MB. Free memory was 56.0MB in the beginning and 61.7MB in the end (delta: -5.7MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * TraceAbstraction took 14448.04ms. Allocated memory was 86.0MB in the beginning and 222.3MB in the end (delta: 136.3MB). Free memory was 60.9MB in the beginning and 119.3MB in the end (delta: -58.4MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. * Witness Printer took 65.93ms. Allocated memory is still 222.3MB. Free memory was 119.3MB in the beginning and 109.9MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 148 PlacesBefore, 35 PlacesAfterwards, 151 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 84 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 141 TotalNumberOfCompositions, 9688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6870, independent: 6685, independent conditional: 0, independent unconditional: 6685, dependent: 185, dependent conditional: 0, dependent unconditional: 185, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4087, independent: 4036, independent conditional: 0, independent unconditional: 4036, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6870, independent: 2649, independent conditional: 0, independent unconditional: 2649, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 4087, unknown conditional: 0, unknown unconditional: 4087] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - 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: 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: 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, 254 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: 14.2s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1695 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1521 mSDsluCounter, 3211 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3207 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8861 IncrementalHoareTripleChecker+Invalid, 8914 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 4 mSDtfsCounter, 8861 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=730occurred in iteration=8, InterpolantAutomatonStates: 56, 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, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 1281 SizeOfPredicates, 1 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 3/9 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! [2023-09-01 09:02:00,943 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