./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --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/weaver/popl20-bad-counter-queue.wvr.c -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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:45:57,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:45:57,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:45:57,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:45:57,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:45:57,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:45:57,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:45:57,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:45:57,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:45:57,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:45:57,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:45:57,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:45:57,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:45:57,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:45:57,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:45:57,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:45:57,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:45:57,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:45:57,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:45:57,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:45:57,850 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:45:57,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:45:57,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:45:57,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:45:57,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:45:57,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:45:57,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:45:57,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:45:57,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:45:57,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:45:57,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:45:57,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:45:57,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:45:57,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:45:57,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:45:57,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:45:57,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:45:57,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:45:57,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:45:57,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:45:57,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:45:57,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:45:57,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:45:57,884 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:45:57,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:45:57,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:45:57,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:45:57,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:45:57,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:45:57,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:45:57,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:45:57,886 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:45:57,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:45:57,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:45:57,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:45:57,888 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:45:57,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:45:57,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:45:57,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:45:57,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:45:57,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:45:57,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:45:57,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:45:57,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:45:57,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-07-22 21:45:58,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:45:58,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:45:58,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:45:58,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:45:58,091 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:45:58,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-07-22 21:45:58,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693354744/6bfaa28811fc4a918f9cbf0bbc9efedc/FLAG4afe1a48d [2022-07-22 21:45:58,517 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:45:58,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-07-22 21:45:58,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693354744/6bfaa28811fc4a918f9cbf0bbc9efedc/FLAG4afe1a48d [2022-07-22 21:45:58,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693354744/6bfaa28811fc4a918f9cbf0bbc9efedc [2022-07-22 21:45:58,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:45:58,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:45:58,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:58,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:45:58,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:45:58,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0e9b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58, skipping insertion in model container [2022-07-22 21:45:58,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:45:58,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:45:58,685 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/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-07-22 21:45:58,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:58,709 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:45:58,738 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/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-07-22 21:45:58,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:58,761 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:45:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58 WrapperNode [2022-07-22 21:45:58,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:58,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:58,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:45:58,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:45:58,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,797 INFO L137 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-07-22 21:45:58,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:58,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:45:58,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:45:58,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:45:58,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:45:58,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:45:58,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:45:58,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:45:58,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (1/1) ... [2022-07-22 21:45:58,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:45:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:58,871 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 21:45:58,872 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 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:45:58,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:45:58,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:45:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:45:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:45:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:45:58,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:45:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:45:58,900 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 21:45:58,968 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:45:58,969 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:45:59,169 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:45:59,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:45:59,225 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:45:59,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:59 BoogieIcfgContainer [2022-07-22 21:45:59,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:45:59,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:45:59,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:45:59,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:45:59,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:45:58" (1/3) ... [2022-07-22 21:45:59,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c5713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:59, skipping insertion in model container [2022-07-22 21:45:59,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:58" (2/3) ... [2022-07-22 21:45:59,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635c5713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:59, skipping insertion in model container [2022-07-22 21:45:59,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:59" (3/3) ... [2022-07-22 21:45:59,232 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-07-22 21:45:59,235 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:45:59,241 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:45:59,241 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:45:59,242 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:45:59,272 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:45:59,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2022-07-22 21:45:59,359 INFO L129 PetriNetUnfolder]: 9/117 cut-off events. [2022-07-22 21:45:59,359 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:45:59,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-07-22 21:45:59,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2022-07-22 21:45:59,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2022-07-22 21:45:59,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:45:59,384 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@314fb425, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b16c6e2 [2022-07-22 21:45:59,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:45:59,409 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2022-07-22 21:45:59,409 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:45:59,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:59,411 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:59,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:45:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1729578090, now seen corresponding path program 1 times [2022-07-22 21:45:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467662434] [2022-07-22 21:45:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:59,748 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 21:45:59,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467662434] [2022-07-22 21:45:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467662434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:59,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:45:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400833009] [2022-07-22 21:45:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:45:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:45:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:45:59,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 119 [2022-07-22 21:45:59,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 21:45:59,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:59,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 119 [2022-07-22 21:45:59,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:59,925 INFO L129 PetriNetUnfolder]: 26/185 cut-off events. [2022-07-22 21:45:59,925 INFO L130 PetriNetUnfolder]: For 35/36 co-relation queries the response was YES. [2022-07-22 21:45:59,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 185 events. 26/185 cut-off events. For 35/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 451 event pairs, 6 based on Foata normal form. 22/193 useless extension candidates. Maximal degree in co-relation 122. Up to 39 conditions per place. [2022-07-22 21:45:59,927 INFO L132 encePairwiseOnDemand]: 104/119 looper letters, 24 selfloop transitions, 3 changer transitions 8/113 dead transitions. [2022-07-22 21:45:59,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 317 flow [2022-07-22 21:45:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:45:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:45:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 661 transitions. [2022-07-22 21:45:59,938 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7935174069627852 [2022-07-22 21:45:59,938 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 661 transitions. [2022-07-22 21:45:59,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 661 transitions. [2022-07-22 21:45:59,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:59,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 661 transitions. [2022-07-22 21:45:59,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.42857142857143) internal successors, (661), 7 states have internal predecessors, (661), 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 21:45:59,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:45:59,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:45:59,952 INFO L186 Difference]: Start difference. First operand has 106 places, 108 transitions, 228 flow. Second operand 7 states and 661 transitions. [2022-07-22 21:45:59,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 317 flow [2022-07-22 21:45:59,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:45:59,958 INFO L242 Difference]: Finished difference. Result has 111 places, 101 transitions, 225 flow [2022-07-22 21:45:59,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2022-07-22 21:45:59,965 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2022-07-22 21:45:59,965 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 225 flow [2022-07-22 21:45:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 21:45:59,966 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:59,966 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:59,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:45:59,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:45:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 397909448, now seen corresponding path program 1 times [2022-07-22 21:45:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274651097] [2022-07-22 21:45:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:00,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274651097] [2022-07-22 21:46:00,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274651097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:00,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:00,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:46:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647899813] [2022-07-22 21:46:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:00,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:46:00,110 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-22 21:46:00,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 21:46:00,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:00,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-22 21:46:00,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:00,283 INFO L129 PetriNetUnfolder]: 95/406 cut-off events. [2022-07-22 21:46:00,283 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-22 21:46:00,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 406 events. 95/406 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1805 event pairs, 42 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 654. Up to 136 conditions per place. [2022-07-22 21:46:00,287 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 37 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-07-22 21:46:00,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 119 transitions, 356 flow [2022-07-22 21:46:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:46:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:46:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-07-22 21:46:00,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2022-07-22 21:46:00,293 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-07-22 21:46:00,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-07-22 21:46:00,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:00,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-07-22 21:46:00,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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 21:46:00,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 21:46:00,298 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 21:46:00,298 INFO L186 Difference]: Start difference. First operand has 111 places, 101 transitions, 225 flow. Second operand 8 states and 726 transitions. [2022-07-22 21:46:00,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 119 transitions, 356 flow [2022-07-22 21:46:00,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 119 transitions, 349 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:46:00,302 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 254 flow [2022-07-22 21:46:00,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2022-07-22 21:46:00,303 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2022-07-22 21:46:00,303 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 254 flow [2022-07-22 21:46:00,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 21:46:00,303 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:00,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:46:00,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1293595690, now seen corresponding path program 1 times [2022-07-22 21:46:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:00,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110872960] [2022-07-22 21:46:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:00,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110872960] [2022-07-22 21:46:00,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110872960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:00,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:00,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:46:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630287001] [2022-07-22 21:46:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:00,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:46:00,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-22 21:46:00,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 21:46:00,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:00,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-22 21:46:00,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:00,531 INFO L129 PetriNetUnfolder]: 81/328 cut-off events. [2022-07-22 21:46:00,532 INFO L130 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2022-07-22 21:46:00,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 328 events. 81/328 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1253 event pairs, 47 based on Foata normal form. 3/306 useless extension candidates. Maximal degree in co-relation 422. Up to 144 conditions per place. [2022-07-22 21:46:00,534 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 25 selfloop transitions, 6 changer transitions 11/116 dead transitions. [2022-07-22 21:46:00,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 365 flow [2022-07-22 21:46:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:46:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:46:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2022-07-22 21:46:00,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7584033613445378 [2022-07-22 21:46:00,537 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2022-07-22 21:46:00,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2022-07-22 21:46:00,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:00,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2022-07-22 21:46:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 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 21:46:00,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 21:46:00,541 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 21:46:00,541 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 254 flow. Second operand 8 states and 722 transitions. [2022-07-22 21:46:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 365 flow [2022-07-22 21:46:00,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:00,546 INFO L242 Difference]: Finished difference. Result has 116 places, 102 transitions, 248 flow [2022-07-22 21:46:00,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2022-07-22 21:46:00,548 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2022-07-22 21:46:00,548 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 248 flow [2022-07-22 21:46:00,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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 21:46:00,549 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:00,549 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:00,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:46:00,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash -63413436, now seen corresponding path program 1 times [2022-07-22 21:46:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951647076] [2022-07-22 21:46:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:00,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:00,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951647076] [2022-07-22 21:46:00,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951647076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678496421] [2022-07-22 21:46:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:00,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:00,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:00,668 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 21:46:00,690 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 21:46:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:46:00,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:00,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678496421] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:01,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:01,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:46:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906901881] [2022-07-22 21:46:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:01,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-22 21:46:01,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 21:46:01,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-22 21:46:01,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:01,088 INFO L129 PetriNetUnfolder]: 70/263 cut-off events. [2022-07-22 21:46:01,088 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-22 21:46:01,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 263 events. 70/263 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 863 event pairs, 17 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 420. Up to 79 conditions per place. [2022-07-22 21:46:01,090 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 27 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2022-07-22 21:46:01,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 333 flow [2022-07-22 21:46:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:46:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:46:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-07-22 21:46:01,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-07-22 21:46:01,091 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:01,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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 21:46:01,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:46:01,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:46:01,094 INFO L186 Difference]: Start difference. First operand has 116 places, 102 transitions, 248 flow. Second operand 7 states and 629 transitions. [2022-07-22 21:46:01,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 333 flow [2022-07-22 21:46:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 307 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-22 21:46:01,096 INFO L242 Difference]: Finished difference. Result has 112 places, 104 transitions, 259 flow [2022-07-22 21:46:01,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-07-22 21:46:01,097 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2022-07-22 21:46:01,097 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 259 flow [2022-07-22 21:46:01,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 21:46:01,097 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,097 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:01,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:01,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:01,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1350927880, now seen corresponding path program 1 times [2022-07-22 21:46:01,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300586216] [2022-07-22 21:46:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300586216] [2022-07-22 21:46:01,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300586216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756254751] [2022-07-22 21:46:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:01,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:01,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:46:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:46:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756254751] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:01,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:01,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:46:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962252419] [2022-07-22 21:46:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:01,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-22 21:46:01,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 21:46:01,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-22 21:46:01,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:01,668 INFO L129 PetriNetUnfolder]: 59/261 cut-off events. [2022-07-22 21:46:01,668 INFO L130 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2022-07-22 21:46:01,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 261 events. 59/261 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 790 event pairs, 20 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 418. Up to 67 conditions per place. [2022-07-22 21:46:01,670 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 29 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2022-07-22 21:46:01,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 110 transitions, 352 flow [2022-07-22 21:46:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:46:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:46:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-07-22 21:46:01,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-07-22 21:46:01,671 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:01,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-07-22 21:46:01,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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 21:46:01,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:46:01,688 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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 21:46:01,688 INFO L186 Difference]: Start difference. First operand has 112 places, 104 transitions, 259 flow. Second operand 7 states and 629 transitions. [2022-07-22 21:46:01,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 110 transitions, 352 flow [2022-07-22 21:46:01,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:01,692 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 278 flow [2022-07-22 21:46:01,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2022-07-22 21:46:01,694 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2022-07-22 21:46:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 278 flow [2022-07-22 21:46:01,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 21:46:01,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,695 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:01,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:01,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:01,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -622709836, now seen corresponding path program 1 times [2022-07-22 21:46:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413888345] [2022-07-22 21:46:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:02,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413888345] [2022-07-22 21:46:02,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413888345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:02,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283532504] [2022-07-22 21:46:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:02,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:02,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:02,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:46:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 21:46:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:02,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:02,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-22 21:46:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:46:02,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:02,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-22 21:46:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:02,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283532504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:02,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 10] total 30 [2022-07-22 21:46:02,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30652132] [2022-07-22 21:46:02,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 21:46:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 21:46:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:46:02,897 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 119 [2022-07-22 21:46:02,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 278 flow. Second operand has 30 states, 30 states have (on average 51.9) internal successors, (1557), 30 states have internal predecessors, (1557), 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 21:46:02,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:02,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 119 [2022-07-22 21:46:02,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:03,997 INFO L129 PetriNetUnfolder]: 822/1752 cut-off events. [2022-07-22 21:46:03,997 INFO L130 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-07-22 21:46:04,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 1752 events. 822/1752 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10701 event pairs, 136 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 4121. Up to 486 conditions per place. [2022-07-22 21:46:04,006 INFO L132 encePairwiseOnDemand]: 96/119 looper letters, 171 selfloop transitions, 63 changer transitions 8/284 dead transitions. [2022-07-22 21:46:04,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 1348 flow [2022-07-22 21:46:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 21:46:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-22 21:46:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1970 transitions. [2022-07-22 21:46:04,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4598506069094304 [2022-07-22 21:46:04,010 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1970 transitions. [2022-07-22 21:46:04,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1970 transitions. [2022-07-22 21:46:04,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1970 transitions. [2022-07-22 21:46:04,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 54.72222222222222) internal successors, (1970), 36 states have internal predecessors, (1970), 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 21:46:04,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 119.0) internal successors, (4403), 37 states have internal predecessors, (4403), 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 21:46:04,019 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 119.0) internal successors, (4403), 37 states have internal predecessors, (4403), 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 21:46:04,019 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 278 flow. Second operand 36 states and 1970 transitions. [2022-07-22 21:46:04,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 1348 flow [2022-07-22 21:46:04,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 284 transitions, 1319 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:46:04,024 INFO L242 Difference]: Finished difference. Result has 159 places, 165 transitions, 718 flow [2022-07-22 21:46:04,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=718, PETRI_PLACES=159, PETRI_TRANSITIONS=165} [2022-07-22 21:46:04,025 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 53 predicate places. [2022-07-22 21:46:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 165 transitions, 718 flow [2022-07-22 21:46:04,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 51.9) internal successors, (1557), 30 states have internal predecessors, (1557), 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 21:46:04,026 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:04,026 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:04,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:04,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:04,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1518610998, now seen corresponding path program 2 times [2022-07-22 21:46:04,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:04,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066553980] [2022-07-22 21:46:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066553980] [2022-07-22 21:46:04,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066553980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976781484] [2022-07-22 21:46:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:04,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:04,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:46:04,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:46:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 21:46:04,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:46:04,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:46:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:04,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:05,034 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_127 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset) c_~counter~0)) (forall ((v_ArrVal_127 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-07-22 21:46:05,059 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_127 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of1ForFork0_~tmp~0#1|)) (forall ((v_ArrVal_127 (Array Int Int))) (<= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-07-22 21:46:05,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:05,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-07-22 21:46:05,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-22 21:46:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:46:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:46:05,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2022-07-22 21:46:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:05,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976781484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:05,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:05,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2022-07-22 21:46:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568529787] [2022-07-22 21:46:05,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 21:46:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 21:46:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1208, Unknown=2, NotChecked=142, Total=1482 [2022-07-22 21:46:05,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 119 [2022-07-22 21:46:05,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 165 transitions, 718 flow. Second operand has 39 states, 39 states have (on average 57.69230769230769) internal successors, (2250), 39 states have internal predecessors, (2250), 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 21:46:05,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:05,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 119 [2022-07-22 21:46:05,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:06,846 INFO L129 PetriNetUnfolder]: 1501/3162 cut-off events. [2022-07-22 21:46:06,846 INFO L130 PetriNetUnfolder]: For 4244/4244 co-relation queries the response was YES. [2022-07-22 21:46:06,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9278 conditions, 3162 events. 1501/3162 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22935 event pairs, 137 based on Foata normal form. 2/3155 useless extension candidates. Maximal degree in co-relation 9231. Up to 1302 conditions per place. [2022-07-22 21:46:06,865 INFO L132 encePairwiseOnDemand]: 96/119 looper letters, 258 selfloop transitions, 84 changer transitions 8/399 dead transitions. [2022-07-22 21:46:06,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 399 transitions, 2537 flow [2022-07-22 21:46:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 21:46:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-22 21:46:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2302 transitions. [2022-07-22 21:46:06,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5228253463547581 [2022-07-22 21:46:06,870 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2302 transitions. [2022-07-22 21:46:06,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2302 transitions. [2022-07-22 21:46:06,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:06,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2302 transitions. [2022-07-22 21:46:06,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 62.21621621621622) internal successors, (2302), 37 states have internal predecessors, (2302), 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 21:46:06,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 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 21:46:06,880 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 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 21:46:06,880 INFO L186 Difference]: Start difference. First operand has 159 places, 165 transitions, 718 flow. Second operand 37 states and 2302 transitions. [2022-07-22 21:46:06,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 399 transitions, 2537 flow [2022-07-22 21:46:06,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 399 transitions, 2373 flow, removed 64 selfloop flow, removed 14 redundant places. [2022-07-22 21:46:06,894 INFO L242 Difference]: Finished difference. Result has 198 places, 236 transitions, 1368 flow [2022-07-22 21:46:06,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1368, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2022-07-22 21:46:06,895 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 92 predicate places. [2022-07-22 21:46:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 1368 flow [2022-07-22 21:46:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.69230769230769) internal successors, (2250), 39 states have internal predecessors, (2250), 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 21:46:06,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:06,896 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:06,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:07,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:46:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 729652334, now seen corresponding path program 3 times [2022-07-22 21:46:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541584673] [2022-07-22 21:46:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:46:07,136 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:46:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:46:07,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:46:07,168 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:46:07,168 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-22 21:46:07,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-22 21:46:07,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-22 21:46:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:46:07,170 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-07-22 21:46:07,173 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-22 21:46:07,173 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:46:07,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:46:07 BasicIcfg [2022-07-22 21:46:07,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:46:07,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:46:07,233 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:46:07,234 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:46:07,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:59" (3/4) ... [2022-07-22 21:46:07,235 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 21:46:07,286 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:46:07,287 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:46:07,287 INFO L158 Benchmark]: Toolchain (without parser) took 8751.90ms. Allocated memory was 81.8MB in the beginning and 195.0MB in the end (delta: 113.2MB). Free memory was 39.6MB in the beginning and 50.4MB in the end (delta: -10.8MB). Peak memory consumption was 103.7MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,287 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 81.8MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:46:07,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.16ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 39.4MB in the beginning and 79.9MB in the end (delta: -40.5MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,288 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.92ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,288 INFO L158 Benchmark]: Boogie Preprocessor took 23.24ms. Allocated memory is still 109.1MB. Free memory was 78.2MB in the beginning and 76.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,288 INFO L158 Benchmark]: RCFGBuilder took 404.53ms. Allocated memory is still 109.1MB. Free memory was 76.6MB in the beginning and 67.6MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,288 INFO L158 Benchmark]: TraceAbstraction took 8005.17ms. Allocated memory was 109.1MB in the beginning and 195.0MB in the end (delta: 86.0MB). Free memory was 67.3MB in the beginning and 67.2MB in the end (delta: 91.5kB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,288 INFO L158 Benchmark]: Witness Printer took 53.33ms. Allocated memory is still 195.0MB. Free memory was 67.2MB in the beginning and 50.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-07-22 21:46:07,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 81.8MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.16ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 39.4MB in the beginning and 79.9MB in the end (delta: -40.5MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.92ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.24ms. Allocated memory is still 109.1MB. Free memory was 78.2MB in the beginning and 76.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 404.53ms. Allocated memory is still 109.1MB. Free memory was 76.6MB in the beginning and 67.6MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8005.17ms. Allocated memory was 109.1MB in the beginning and 195.0MB in the end (delta: 86.0MB). Free memory was 67.3MB in the beginning and 67.2MB in the end (delta: 91.5kB). Peak memory consumption was 87.7MB. Max. memory is 16.1GB. * Witness Printer took 53.33ms. Allocated memory is still 195.0MB. Free memory was 67.2MB in the beginning and 50.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={5:0}, t2={3:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, malloc(sizeof(int) * (size_t)size)={-2:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=-6, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={-2:0}, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={-2:0}, counter=0, create_fresh_int_array(N)={-2:0}, N=1, t1={5:0}, t2={3:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-1, t1={5:0}, t2={3:0}] [L49] 1 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L54] 1 counter = tmp VAL [A={-2:0}, counter=-6, i=0, N=1, tmp=-6] [L49] 1 i++ VAL [A={-2:0}, counter=-6, i=1, N=1, tmp=-6] [L49] COND FALSE 1 !(i