./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.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 645ee85d2a671dd1acf511bbf13e9e3bda7e0b5cc29e8abc16fb4ed3af500077 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:31:16,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:31:16,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:31:16,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:31:16,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:31:16,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:31:16,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:31:16,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:31:16,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:31:16,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:31:16,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:31:16,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:31:16,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:31:16,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:31:16,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:31:16,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:31:16,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:31:16,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:31:16,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:31:16,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:31:16,812 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:31:16,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:31:16,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:31:16,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:31:16,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:31:16,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:31:16,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:31:16,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:31:16,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:31:16,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:31:16,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:31:16,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:31:16,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:31:16,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:31:16,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:31:16,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:31:16,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:31:16,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:31:16,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:31:16,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:31:16,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:31:16,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:31:16,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:31:16,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:31:16,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:31:16,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:31:16,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:31:16,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:31:16,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:31:16,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:31:16,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:31:16,867 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:31:16,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:31:16,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:31:16,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:31:16,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:31:16,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:31:16,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:31:16,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:31:16,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:31:16,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:31:16,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:31:16,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:31:16,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:31:16,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:31:16,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:31:16,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:31:16,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:31:16,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:31:16,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:31:16,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:31:16,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:31:16,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:31:16,873 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:31:16,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:31:16,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:31:16,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 645ee85d2a671dd1acf511bbf13e9e3bda7e0b5cc29e8abc16fb4ed3af500077 [2022-07-22 21:31:17,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:31:17,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:31:17,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:31:17,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:31:17,111 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:31:17,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i [2022-07-22 21:31:17,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb85190c4/99143e3ce8494a2c834d691b4edd534f/FLAG037541c89 [2022-07-22 21:31:17,696 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:31:17,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i [2022-07-22 21:31:17,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb85190c4/99143e3ce8494a2c834d691b4edd534f/FLAG037541c89 [2022-07-22 21:31:18,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb85190c4/99143e3ce8494a2c834d691b4edd534f [2022-07-22 21:31:18,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:31:18,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:31:18,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:31:18,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:31:18,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:31:18,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e33eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18, skipping insertion in model container [2022-07-22 21:31:18,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:31:18,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:31:18,312 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i[30035,30048] [2022-07-22 21:31:18,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:31:18,340 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:31:18,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-variant-1.i[30035,30048] [2022-07-22 21:31:18,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:31:18,445 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:31:18,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18 WrapperNode [2022-07-22 21:31:18,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:31:18,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:31:18,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:31:18,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:31:18,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,504 INFO L137 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2022-07-22 21:31:18,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:31:18,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:31:18,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:31:18,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:31:18,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:31:18,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:31:18,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:31:18,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:31:18,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (1/1) ... [2022-07-22 21:31:18,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:31:18,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:31:18,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:31:18,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:31:18,641 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-22 21:31:18,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-22 21:31:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:31:18,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:31:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:31:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:31:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:31:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:31:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:31:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:31:18,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:31:18,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:31:18,644 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:31:18,773 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:31:18,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:31:18,969 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:31:18,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:31:18,975 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 21:31:18,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:31:18 BoogieIcfgContainer [2022-07-22 21:31:18,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:31:18,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:31:18,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:31:18,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:31:18,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:31:18" (1/3) ... [2022-07-22 21:31:18,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1fcc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:31:18, skipping insertion in model container [2022-07-22 21:31:18,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:31:18" (2/3) ... [2022-07-22 21:31:18,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1fcc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:31:18, skipping insertion in model container [2022-07-22 21:31:18,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:31:18" (3/3) ... [2022-07-22 21:31:18,987 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-variant-1.i [2022-07-22 21:31:18,990 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:31:18,997 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:31:18,998 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:31:18,998 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:31:19,041 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:31:19,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 206 flow [2022-07-22 21:31:19,111 INFO L129 PetriNetUnfolder]: 6/111 cut-off events. [2022-07-22 21:31:19,112 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:31:19,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 111 events. 6/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2022-07-22 21:31:19,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 206 flow [2022-07-22 21:31:19,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 97 transitions, 202 flow [2022-07-22 21:31:19,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:31:19,134 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f0b3a45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@362324e0 [2022-07-22 21:31:19,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:31:19,149 INFO L129 PetriNetUnfolder]: 3/61 cut-off events. [2022-07-22 21:31:19,149 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:31:19,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:19,150 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:19,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:31:19,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1012560353, now seen corresponding path program 1 times [2022-07-22 21:31:19,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:19,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963793936] [2022-07-22 21:31:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:19,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963793936] [2022-07-22 21:31:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963793936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:19,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:19,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:31:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520290709] [2022-07-22 21:31:19,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:31:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:31:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:31:19,661 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 98 [2022-07-22 21:31:19,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:19,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:19,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 98 [2022-07-22 21:31:19,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:19,953 INFO L129 PetriNetUnfolder]: 115/510 cut-off events. [2022-07-22 21:31:19,953 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:31:19,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 510 events. 115/510 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2973 event pairs, 32 based on Foata normal form. 8/448 useless extension candidates. Maximal degree in co-relation 705. Up to 70 conditions per place. [2022-07-22 21:31:19,962 INFO L132 encePairwiseOnDemand]: 85/98 looper letters, 34 selfloop transitions, 11 changer transitions 6/121 dead transitions. [2022-07-22 21:31:19,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 121 transitions, 358 flow [2022-07-22 21:31:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:31:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:31:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 846 transitions. [2022-07-22 21:31:19,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7847866419294991 [2022-07-22 21:31:19,983 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 846 transitions. [2022-07-22 21:31:19,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 846 transitions. [2022-07-22 21:31:19,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:19,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 846 transitions. [2022-07-22 21:31:19,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.9090909090909) internal successors, (846), 11 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,007 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,009 INFO L186 Difference]: Start difference. First operand has 98 places, 97 transitions, 202 flow. Second operand 11 states and 846 transitions. [2022-07-22 21:31:20,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 121 transitions, 358 flow [2022-07-22 21:31:20,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 121 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:31:20,017 INFO L242 Difference]: Finished difference. Result has 110 places, 97 transitions, 243 flow [2022-07-22 21:31:20,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=243, PETRI_PLACES=110, PETRI_TRANSITIONS=97} [2022-07-22 21:31:20,024 INFO L279 CegarLoopForPetriNet]: 98 programPoint places, 12 predicate places. [2022-07-22 21:31:20,025 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 97 transitions, 243 flow [2022-07-22 21:31:20,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,026 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:20,027 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:31:20,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:31:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash -271182080, now seen corresponding path program 1 times [2022-07-22 21:31:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:20,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348428439] [2022-07-22 21:31:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:20,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:20,106 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:31:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:20,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:31:20,193 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:31:20,195 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:31:20,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:31:20,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-22 21:31:20,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:31:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:31:20,198 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:31:20,200 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:31:20,201 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:31:20,240 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:31:20,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 132 transitions, 288 flow [2022-07-22 21:31:20,259 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-22 21:31:20,260 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:31:20,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 151 events. 9/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 238 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 160. Up to 6 conditions per place. [2022-07-22 21:31:20,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 132 transitions, 288 flow [2022-07-22 21:31:20,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 118 transitions, 251 flow [2022-07-22 21:31:20,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:31:20,265 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f0b3a45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@362324e0 [2022-07-22 21:31:20,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:31:20,271 INFO L129 PetriNetUnfolder]: 3/60 cut-off events. [2022-07-22 21:31:20,271 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:31:20,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:20,272 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:20,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:31:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2078155084, now seen corresponding path program 1 times [2022-07-22 21:31:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651185967] [2022-07-22 21:31:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:20,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:20,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:20,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651185967] [2022-07-22 21:31:20,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651185967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:20,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:20,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:31:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762308216] [2022-07-22 21:31:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:31:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:31:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:31:20,438 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 132 [2022-07-22 21:31:20,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 118 transitions, 251 flow. Second operand has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:20,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 132 [2022-07-22 21:31:20,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:20,937 INFO L129 PetriNetUnfolder]: 1075/2277 cut-off events. [2022-07-22 21:31:20,937 INFO L130 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-07-22 21:31:20,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 2277 events. 1075/2277 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16956 event pairs, 174 based on Foata normal form. 186/1978 useless extension candidates. Maximal degree in co-relation 3974. Up to 382 conditions per place. [2022-07-22 21:31:20,956 INFO L132 encePairwiseOnDemand]: 117/132 looper letters, 82 selfloop transitions, 14 changer transitions 6/187 dead transitions. [2022-07-22 21:31:20,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 187 transitions, 629 flow [2022-07-22 21:31:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:31:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:31:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1172 transitions. [2022-07-22 21:31:20,960 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8071625344352618 [2022-07-22 21:31:20,960 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1172 transitions. [2022-07-22 21:31:20,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1172 transitions. [2022-07-22 21:31:20,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:20,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1172 transitions. [2022-07-22 21:31:20,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.54545454545455) internal successors, (1172), 11 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,967 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 132.0) internal successors, (1584), 12 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,967 INFO L186 Difference]: Start difference. First operand has 119 places, 118 transitions, 251 flow. Second operand 11 states and 1172 transitions. [2022-07-22 21:31:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 187 transitions, 629 flow [2022-07-22 21:31:20,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 187 transitions, 626 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:31:20,972 INFO L242 Difference]: Finished difference. Result has 132 places, 121 transitions, 322 flow [2022-07-22 21:31:20,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=322, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2022-07-22 21:31:20,973 INFO L279 CegarLoopForPetriNet]: 119 programPoint places, 13 predicate places. [2022-07-22 21:31:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 322 flow [2022-07-22 21:31:20,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:20,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:20,974 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:20,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:31:20,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:31:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1597974071, now seen corresponding path program 1 times [2022-07-22 21:31:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079473614] [2022-07-22 21:31:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:21,001 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:31:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:21,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:31:21,027 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:31:21,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:31:21,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:31:21,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-22 21:31:21,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:31:21,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:31:21,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:31:21,029 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:31:21,029 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:31:21,030 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:31:21,056 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:31:21,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 166 transitions, 374 flow [2022-07-22 21:31:21,113 INFO L129 PetriNetUnfolder]: 12/191 cut-off events. [2022-07-22 21:31:21,113 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:31:21,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 191 events. 12/191 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 342 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-07-22 21:31:21,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 166 transitions, 374 flow [2022-07-22 21:31:21,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 139 transitions, 302 flow [2022-07-22 21:31:21,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:31:21,121 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f0b3a45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@362324e0 [2022-07-22 21:31:21,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:31:21,130 INFO L129 PetriNetUnfolder]: 2/60 cut-off events. [2022-07-22 21:31:21,130 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:31:21,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:21,131 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:21,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:31:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1770621139, now seen corresponding path program 1 times [2022-07-22 21:31:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816436957] [2022-07-22 21:31:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:21,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:21,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816436957] [2022-07-22 21:31:21,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816436957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:21,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:21,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:31:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419423556] [2022-07-22 21:31:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:31:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:31:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:31:21,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 166 [2022-07-22 21:31:21,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:21,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:21,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 166 [2022-07-22 21:31:21,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:23,073 INFO L129 PetriNetUnfolder]: 7591/13458 cut-off events. [2022-07-22 21:31:23,074 INFO L130 PetriNetUnfolder]: For 1020/1020 co-relation queries the response was YES. [2022-07-22 21:31:23,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24415 conditions, 13458 events. 7591/13458 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 115590 event pairs, 514 based on Foata normal form. 1501/11940 useless extension candidates. Maximal degree in co-relation 24357. Up to 2582 conditions per place. [2022-07-22 21:31:23,197 INFO L132 encePairwiseOnDemand]: 149/166 looper letters, 114 selfloop transitions, 17 changer transitions 6/237 dead transitions. [2022-07-22 21:31:23,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 850 flow [2022-07-22 21:31:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:31:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:31:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1478 transitions. [2022-07-22 21:31:23,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8094194961664841 [2022-07-22 21:31:23,202 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1478 transitions. [2022-07-22 21:31:23,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1478 transitions. [2022-07-22 21:31:23,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:23,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1478 transitions. [2022-07-22 21:31:23,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.36363636363637) internal successors, (1478), 11 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:23,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:23,209 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:23,210 INFO L186 Difference]: Start difference. First operand has 140 places, 139 transitions, 302 flow. Second operand 11 states and 1478 transitions. [2022-07-22 21:31:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 850 flow [2022-07-22 21:31:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 831 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-22 21:31:23,216 INFO L242 Difference]: Finished difference. Result has 153 places, 144 transitions, 390 flow [2022-07-22 21:31:23,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=153, PETRI_TRANSITIONS=144} [2022-07-22 21:31:23,218 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 13 predicate places. [2022-07-22 21:31:23,218 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 144 transitions, 390 flow [2022-07-22 21:31:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.625) internal successors, (965), 8 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:23,219 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:23,219 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:23,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:31:23,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:31:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 21293343, now seen corresponding path program 1 times [2022-07-22 21:31:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724969244] [2022-07-22 21:31:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:23,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:23,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724969244] [2022-07-22 21:31:23,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724969244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:23,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:23,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 21:31:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134358999] [2022-07-22 21:31:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:31:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:31:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:31:23,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 166 [2022-07-22 21:31:23,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 144 transitions, 390 flow. Second operand has 11 states, 11 states have (on average 119.72727272727273) internal successors, (1317), 11 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:23,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:23,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 166 [2022-07-22 21:31:23,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:26,345 INFO L129 PetriNetUnfolder]: 11554/20593 cut-off events. [2022-07-22 21:31:26,346 INFO L130 PetriNetUnfolder]: For 10318/10318 co-relation queries the response was YES. [2022-07-22 21:31:26,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46703 conditions, 20593 events. 11554/20593 cut-off events. For 10318/10318 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 187372 event pairs, 482 based on Foata normal form. 87/16364 useless extension candidates. Maximal degree in co-relation 46638. Up to 2160 conditions per place. [2022-07-22 21:31:26,660 INFO L132 encePairwiseOnDemand]: 154/166 looper letters, 242 selfloop transitions, 47 changer transitions 13/401 dead transitions. [2022-07-22 21:31:26,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 401 transitions, 1889 flow [2022-07-22 21:31:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:31:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:31:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2896 transitions. [2022-07-22 21:31:26,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929901423877328 [2022-07-22 21:31:26,668 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2896 transitions. [2022-07-22 21:31:26,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2896 transitions. [2022-07-22 21:31:26,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:26,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2896 transitions. [2022-07-22 21:31:26,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.63636363636363) internal successors, (2896), 22 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:26,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 166.0) internal successors, (3818), 23 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:26,684 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 166.0) internal successors, (3818), 23 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:26,685 INFO L186 Difference]: Start difference. First operand has 153 places, 144 transitions, 390 flow. Second operand 22 states and 2896 transitions. [2022-07-22 21:31:26,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 401 transitions, 1889 flow [2022-07-22 21:31:26,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 401 transitions, 1883 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:31:26,922 INFO L242 Difference]: Finished difference. Result has 181 places, 176 transitions, 773 flow [2022-07-22 21:31:26,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=773, PETRI_PLACES=181, PETRI_TRANSITIONS=176} [2022-07-22 21:31:26,924 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 41 predicate places. [2022-07-22 21:31:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 176 transitions, 773 flow [2022-07-22 21:31:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 119.72727272727273) internal successors, (1317), 11 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:26,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:26,926 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:31:26,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:31:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1632407279, now seen corresponding path program 1 times [2022-07-22 21:31:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573373805] [2022-07-22 21:31:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:26,978 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:31:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:31:27,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:31:27,017 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:31:27,017 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:31:27,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:31:27,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-22 21:31:27,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:31:27,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:31:27,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:31:27,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:31:27,019 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:31:27,020 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:31:27,020 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:31:27,055 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:31:27,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 200 transitions, 464 flow [2022-07-22 21:31:27,087 INFO L129 PetriNetUnfolder]: 15/231 cut-off events. [2022-07-22 21:31:27,087 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:31:27,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 231 events. 15/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 456 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 251. Up to 10 conditions per place. [2022-07-22 21:31:27,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 200 transitions, 464 flow [2022-07-22 21:31:27,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 160 transitions, 355 flow [2022-07-22 21:31:27,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:31:27,098 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f0b3a45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@362324e0 [2022-07-22 21:31:27,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:31:27,103 INFO L129 PetriNetUnfolder]: 3/62 cut-off events. [2022-07-22 21:31:27,103 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:31:27,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:27,103 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:27,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:31:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -326012866, now seen corresponding path program 1 times [2022-07-22 21:31:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804801810] [2022-07-22 21:31:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:27,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:27,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804801810] [2022-07-22 21:31:27,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804801810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:27,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:27,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:31:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584599419] [2022-07-22 21:31:27,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:27,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:31:27,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:31:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:31:27,245 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 200 [2022-07-22 21:31:27,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 355 flow. Second operand has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:27,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:27,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 200 [2022-07-22 21:31:27,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:34,307 INFO L129 PetriNetUnfolder]: 45643/72699 cut-off events. [2022-07-22 21:31:34,308 INFO L130 PetriNetUnfolder]: For 8184/8184 co-relation queries the response was YES. [2022-07-22 21:31:34,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134417 conditions, 72699 events. 45643/72699 cut-off events. For 8184/8184 co-relation queries the response was YES. Maximal size of possible extension queue 3560. Compared 661000 event pairs, 8708 based on Foata normal form. 8716/63830 useless extension candidates. Maximal degree in co-relation 134358. Up to 16265 conditions per place. [2022-07-22 21:31:35,179 INFO L132 encePairwiseOnDemand]: 181/200 looper letters, 146 selfloop transitions, 20 changer transitions 6/287 dead transitions. [2022-07-22 21:31:35,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 287 transitions, 1085 flow [2022-07-22 21:31:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:31:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:31:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1784 transitions. [2022-07-22 21:31:35,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8109090909090909 [2022-07-22 21:31:35,187 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1784 transitions. [2022-07-22 21:31:35,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1784 transitions. [2022-07-22 21:31:35,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:35,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1784 transitions. [2022-07-22 21:31:35,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.1818181818182) internal successors, (1784), 11 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:35,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:35,198 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:35,198 INFO L186 Difference]: Start difference. First operand has 161 places, 160 transitions, 355 flow. Second operand 11 states and 1784 transitions. [2022-07-22 21:31:35,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 287 transitions, 1085 flow [2022-07-22 21:31:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 287 transitions, 1036 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-22 21:31:35,206 INFO L242 Difference]: Finished difference. Result has 174 places, 167 transitions, 458 flow [2022-07-22 21:31:35,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=458, PETRI_PLACES=174, PETRI_TRANSITIONS=167} [2022-07-22 21:31:35,207 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 13 predicate places. [2022-07-22 21:31:35,207 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 167 transitions, 458 flow [2022-07-22 21:31:35,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:35,208 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:35,208 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:31:35,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:31:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1636824872, now seen corresponding path program 1 times [2022-07-22 21:31:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:35,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813115037] [2022-07-22 21:31:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813115037] [2022-07-22 21:31:35,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813115037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:35,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:35,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 21:31:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483282164] [2022-07-22 21:31:35,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:31:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:31:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:31:35,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 200 [2022-07-22 21:31:35,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 167 transitions, 458 flow. Second operand has 11 states, 11 states have (on average 143.72727272727272) internal successors, (1581), 11 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:35,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:35,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 200 [2022-07-22 21:31:35,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:31:47,786 INFO L129 PetriNetUnfolder]: 76009/121661 cut-off events. [2022-07-22 21:31:47,787 INFO L130 PetriNetUnfolder]: For 70223/70223 co-relation queries the response was YES. [2022-07-22 21:31:48,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282588 conditions, 121661 events. 76009/121661 cut-off events. For 70223/70223 co-relation queries the response was YES. Maximal size of possible extension queue 6340. Compared 1181342 event pairs, 5594 based on Foata normal form. 390/95489 useless extension candidates. Maximal degree in co-relation 282522. Up to 15768 conditions per place. [2022-07-22 21:31:49,469 INFO L132 encePairwiseOnDemand]: 187/200 looper letters, 322 selfloop transitions, 57 changer transitions 13/506 dead transitions. [2022-07-22 21:31:49,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 506 transitions, 2463 flow [2022-07-22 21:31:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:31:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:31:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3514 transitions. [2022-07-22 21:31:49,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7986363636363636 [2022-07-22 21:31:49,478 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3514 transitions. [2022-07-22 21:31:49,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3514 transitions. [2022-07-22 21:31:49,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:31:49,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3514 transitions. [2022-07-22 21:31:49,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 159.72727272727272) internal successors, (3514), 22 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:49,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:49,498 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 200.0) internal successors, (4600), 23 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:49,498 INFO L186 Difference]: Start difference. First operand has 174 places, 167 transitions, 458 flow. Second operand 22 states and 3514 transitions. [2022-07-22 21:31:49,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 506 transitions, 2463 flow [2022-07-22 21:31:51,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 506 transitions, 2457 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:31:51,750 INFO L242 Difference]: Finished difference. Result has 202 places, 206 transitions, 932 flow [2022-07-22 21:31:51,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=932, PETRI_PLACES=202, PETRI_TRANSITIONS=206} [2022-07-22 21:31:51,751 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 41 predicate places. [2022-07-22 21:31:51,751 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 206 transitions, 932 flow [2022-07-22 21:31:51,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 143.72727272727272) internal successors, (1581), 11 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:51,752 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:51,753 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:51,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:31:51,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:31:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash -907546208, now seen corresponding path program 1 times [2022-07-22 21:31:51,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:51,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303386888] [2022-07-22 21:31:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:51,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303386888] [2022-07-22 21:31:51,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303386888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:31:51,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493055349] [2022-07-22 21:31:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:51,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:31:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:31:51,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:31:51,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:31:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:31:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:31:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:52,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:31:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:52,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493055349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:31:52,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:31:52,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-22 21:31:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254905076] [2022-07-22 21:31:52,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:31:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 21:31:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 21:31:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:31:52,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 200 [2022-07-22 21:31:52,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 206 transitions, 932 flow. Second operand has 25 states, 25 states have (on average 143.24) internal successors, (3581), 25 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:52,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:52,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 200 [2022-07-22 21:31:52,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand