./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/goblint-regression/28-race_reach_02-simple_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:15:21,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:15:21,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:15:21,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:15:21,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:15:21,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:15:21,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:15:21,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:15:21,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:15:22,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:15:22,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:15:22,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:15:22,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:15:22,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:15:22,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:15:22,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:15:22,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:15:22,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:15:22,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:15:22,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:15:22,022 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:15:22,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:15:22,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:15:22,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:15:22,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:15:22,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:15:22,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:15:22,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:15:22,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:15:22,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:15:22,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:15:22,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:15:22,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:15:22,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:15:22,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:15:22,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:15:22,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:15:22,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:15:22,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:15:22,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:15:22,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:15:22,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:15:22,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:15:22,077 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:15:22,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:15:22,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:15:22,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:15:22,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:15:22,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:15:22,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:15:22,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:15:22,080 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:15:22,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:15:22,081 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:15:22,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:15:22,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:15:22,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:15:22,083 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:15:22,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:15:22,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:15:22,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:15:22,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:15:22,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:15:22,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:15:22,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:15:22,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:15:22,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:15:22,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:15:22,085 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:15:22,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:15:22,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:15:22,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2022-07-12 10:15:22,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:15:22,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:15:22,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:15:22,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:15:22,335 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:15:22,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-07-12 10:15:22,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3c431b8/522854a1aac941e08b73f37eb62d4418/FLAG01fada952 [2022-07-12 10:15:22,862 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:15:22,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-07-12 10:15:22,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3c431b8/522854a1aac941e08b73f37eb62d4418/FLAG01fada952 [2022-07-12 10:15:23,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3c431b8/522854a1aac941e08b73f37eb62d4418 [2022-07-12 10:15:23,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:15:23,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:15:23,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:15:23,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:15:23,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:15:23,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f1a6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23, skipping insertion in model container [2022-07-12 10:15:23,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:15:23,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:15:23,513 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/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-07-12 10:15:23,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:15:23,550 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:15:23,609 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/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-07-12 10:15:23,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:15:23,661 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:15:23,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23 WrapperNode [2022-07-12 10:15:23,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:15:23,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:15:23,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:15:23,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:15:23,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,723 INFO L137 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-07-12 10:15:23,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:15:23,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:15:23,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:15:23,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:15:23,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:15:23,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:15:23,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:15:23,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:15:23,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (1/1) ... [2022-07-12 10:15:23,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:15:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:23,817 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) [2022-07-12 10:15:23,841 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 [2022-07-12 10:15:23,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:15:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:15:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:15:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:15:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:15:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:15:23,861 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:15:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:15:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:15:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:15:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:15:23,863 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:15:23,957 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:15:23,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:15:24,147 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:15:24,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:15:24,154 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-12 10:15:24,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:15:24 BoogieIcfgContainer [2022-07-12 10:15:24,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:15:24,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:15:24,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:15:24,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:15:24,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:15:23" (1/3) ... [2022-07-12 10:15:24,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513a512b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:15:24, skipping insertion in model container [2022-07-12 10:15:24,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:15:23" (2/3) ... [2022-07-12 10:15:24,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513a512b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:15:24, skipping insertion in model container [2022-07-12 10:15:24,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:15:24" (3/3) ... [2022-07-12 10:15:24,164 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2022-07-12 10:15:24,168 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:15:24,176 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:15:24,178 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:15:24,178 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:15:24,253 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:15:24,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-07-12 10:15:24,371 INFO L129 PetriNetUnfolder]: 17/150 cut-off events. [2022-07-12 10:15:24,372 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:15:24,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2022-07-12 10:15:24,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-07-12 10:15:24,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-07-12 10:15:24,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:15:24,410 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@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:15:24,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:15:24,445 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2022-07-12 10:15:24,445 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:24,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:24,447 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] [2022-07-12 10:15:24,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1446809384, now seen corresponding path program 1 times [2022-07-12 10:15:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:24,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039416121] [2022-07-12 10:15:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:24,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039416121] [2022-07-12 10:15:24,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039416121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:24,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:24,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:15:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173810983] [2022-07-12 10:15:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:15:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:24,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:15:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:15:24,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2022-07-12 10:15:24,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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) [2022-07-12 10:15:24,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:24,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2022-07-12 10:15:24,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:24,877 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2022-07-12 10:15:24,877 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:24,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 23/121 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:15:24,879 INFO L132 encePairwiseOnDemand]: 100/114 looper letters, 8 selfloop transitions, 2 changer transitions 15/99 dead transitions. [2022-07-12 10:15:24,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 223 flow [2022-07-12 10:15:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:15:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:15:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2022-07-12 10:15:24,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9005847953216374 [2022-07-12 10:15:24,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2022-07-12 10:15:24,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2022-07-12 10:15:24,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:24,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2022-07-12 10:15:24,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2022-07-12 10:15:24,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2022-07-12 10:15:24,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2022-07-12 10:15:24,917 INFO L186 Difference]: Start difference. First operand has 101 places, 109 transitions, 223 flow. Second operand 3 states and 308 transitions. [2022-07-12 10:15:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 223 flow [2022-07-12 10:15:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 99 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:24,924 INFO L242 Difference]: Finished difference. Result has 103 places, 82 transitions, 177 flow [2022-07-12 10:15:24,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=103, PETRI_TRANSITIONS=82} [2022-07-12 10:15:24,929 INFO L279 CegarLoopForPetriNet]: 101 programPoint places, 2 predicate places. [2022-07-12 10:15:24,929 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 82 transitions, 177 flow [2022-07-12 10:15:24,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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) [2022-07-12 10:15:24,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:24,929 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:15:24,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash 515695535, now seen corresponding path program 1 times [2022-07-12 10:15:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590467940] [2022-07-12 10:15:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:24,961 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:15:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:25,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:15:25,021 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:15:25,023 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:15:25,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:15:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:15:25,027 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:15:25,030 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:15:25,031 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:15:25,064 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:15:25,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2022-07-12 10:15:25,107 INFO L129 PetriNetUnfolder]: 31/241 cut-off events. [2022-07-12 10:15:25,108 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:15:25,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 241 events. 31/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 665 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2022-07-12 10:15:25,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2022-07-12 10:15:25,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2022-07-12 10:15:25,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:15:25,121 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:15:25,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:15:25,135 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2022-07-12 10:15:25,136 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:25,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:25,136 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] [2022-07-12 10:15:25,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash -804450649, now seen corresponding path program 1 times [2022-07-12 10:15:25,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:25,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497345541] [2022-07-12 10:15:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:25,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497345541] [2022-07-12 10:15:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497345541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:25,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:25,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:15:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146687930] [2022-07-12 10:15:25,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:15:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:15:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:15:25,225 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 144 [2022-07-12 10:15:25,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 144 transitions, 306 flow. Second operand has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 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) [2022-07-12 10:15:25,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:25,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 144 [2022-07-12 10:15:25,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:25,256 INFO L129 PetriNetUnfolder]: 3/210 cut-off events. [2022-07-12 10:15:25,256 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-12 10:15:25,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 210 events. 3/210 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 514 event pairs, 0 based on Foata normal form. 42/242 useless extension candidates. Maximal degree in co-relation 136. Up to 7 conditions per place. [2022-07-12 10:15:25,257 INFO L132 encePairwiseOnDemand]: 127/144 looper letters, 2 selfloop transitions, 0 changer transitions 21/126 dead transitions. [2022-07-12 10:15:25,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 126 transitions, 278 flow [2022-07-12 10:15:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:15:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:15:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 265 transitions. [2022-07-12 10:15:25,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9201388888888888 [2022-07-12 10:15:25,260 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 265 transitions. [2022-07-12 10:15:25,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 265 transitions. [2022-07-12 10:15:25,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:25,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 265 transitions. [2022-07-12 10:15:25,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 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) [2022-07-12 10:15:25,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2022-07-12 10:15:25,264 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2022-07-12 10:15:25,265 INFO L186 Difference]: Start difference. First operand has 130 places, 144 transitions, 306 flow. Second operand 2 states and 265 transitions. [2022-07-12 10:15:25,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 126 transitions, 278 flow [2022-07-12 10:15:25,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 126 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:25,268 INFO L242 Difference]: Finished difference. Result has 130 places, 105 transitions, 222 flow [2022-07-12 10:15:25,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=222, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2022-07-12 10:15:25,269 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, 0 predicate places. [2022-07-12 10:15:25,270 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 222 flow [2022-07-12 10:15:25,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 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) [2022-07-12 10:15:25,270 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:25,270 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] [2022-07-12 10:15:25,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:15:25,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1693565288, now seen corresponding path program 1 times [2022-07-12 10:15:25,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:25,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556240220] [2022-07-12 10:15:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556240220] [2022-07-12 10:15:25,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556240220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:25,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:25,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:15:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637807093] [2022-07-12 10:15:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:25,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:15:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:15:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:15:25,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 144 [2022-07-12 10:15:25,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 105 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2022-07-12 10:15:25,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:25,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 144 [2022-07-12 10:15:25,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:25,397 INFO L129 PetriNetUnfolder]: 0/129 cut-off events. [2022-07-12 10:15:25,397 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:15:25,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 129 events. 0/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:15:25,399 INFO L132 encePairwiseOnDemand]: 141/144 looper letters, 11 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-07-12 10:15:25,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 109 transitions, 256 flow [2022-07-12 10:15:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:15:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:15:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-07-12 10:15:25,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8310185185185185 [2022-07-12 10:15:25,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-07-12 10:15:25,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-07-12 10:15:25,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:25,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-07-12 10:15:25,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2022-07-12 10:15:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 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) [2022-07-12 10:15:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 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) [2022-07-12 10:15:25,406 INFO L186 Difference]: Start difference. First operand has 130 places, 105 transitions, 222 flow. Second operand 3 states and 359 transitions. [2022-07-12 10:15:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 109 transitions, 256 flow [2022-07-12 10:15:25,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 254 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:25,414 INFO L242 Difference]: Finished difference. Result has 114 places, 106 transitions, 232 flow [2022-07-12 10:15:25,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=114, PETRI_TRANSITIONS=106} [2022-07-12 10:15:25,416 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -16 predicate places. [2022-07-12 10:15:25,416 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 106 transitions, 232 flow [2022-07-12 10:15:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2022-07-12 10:15:25,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:25,417 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] [2022-07-12 10:15:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:15:25,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 729405808, now seen corresponding path program 1 times [2022-07-12 10:15:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:25,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800457891] [2022-07-12 10:15:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:25,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:25,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800457891] [2022-07-12 10:15:25,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800457891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:15:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423929731] [2022-07-12 10:15:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:25,512 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) [2022-07-12 10:15:25,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:15:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:15:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:15:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:25,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:15:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:25,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423929731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:15:25,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:15:25,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:15:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353477908] [2022-07-12 10:15:25,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:15:25,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:15:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:15:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:15:25,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 144 [2022-07-12 10:15:25,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 106 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 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) [2022-07-12 10:15:25,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:25,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 144 [2022-07-12 10:15:25,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:25,892 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2022-07-12 10:15:25,892 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:15:25,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 107 events. 0/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:15:25,893 INFO L132 encePairwiseOnDemand]: 139/144 looper letters, 9 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2022-07-12 10:15:25,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 101 transitions, 252 flow [2022-07-12 10:15:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:15:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:15:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1044 transitions. [2022-07-12 10:15:25,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2022-07-12 10:15:25,898 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1044 transitions. [2022-07-12 10:15:25,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1044 transitions. [2022-07-12 10:15:25,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:25,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1044 transitions. [2022-07-12 10:15:25,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 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) [2022-07-12 10:15:25,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 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) [2022-07-12 10:15:25,907 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 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) [2022-07-12 10:15:25,907 INFO L186 Difference]: Start difference. First operand has 114 places, 106 transitions, 232 flow. Second operand 9 states and 1044 transitions. [2022-07-12 10:15:25,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 101 transitions, 252 flow [2022-07-12 10:15:25,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:15:25,910 INFO L242 Difference]: Finished difference. Result has 110 places, 97 transitions, 224 flow [2022-07-12 10:15:25,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=224, PETRI_PLACES=110, PETRI_TRANSITIONS=97} [2022-07-12 10:15:25,911 INFO L279 CegarLoopForPetriNet]: 130 programPoint places, -20 predicate places. [2022-07-12 10:15:25,912 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 97 transitions, 224 flow [2022-07-12 10:15:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 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) [2022-07-12 10:15:25,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:25,913 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:25,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:15:26,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:26,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1971921984, now seen corresponding path program 1 times [2022-07-12 10:15:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:26,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442392409] [2022-07-12 10:15:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:26,164 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:15:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:26,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:15:26,186 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:15:26,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:15:26,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:15:26,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:15:26,187 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:15:26,187 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:15:26,187 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:15:26,205 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:15:26,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2022-07-12 10:15:26,244 INFO L129 PetriNetUnfolder]: 50/365 cut-off events. [2022-07-12 10:15:26,244 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:15:26,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 365 events. 50/365 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1153 event pairs, 1 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 249. Up to 16 conditions per place. [2022-07-12 10:15:26,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 174 transitions, 378 flow [2022-07-12 10:15:26,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 174 transitions, 378 flow [2022-07-12 10:15:26,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:15:26,254 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@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:15:26,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:15:26,259 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2022-07-12 10:15:26,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:26,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:26,260 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] [2022-07-12 10:15:26,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2095383893, now seen corresponding path program 1 times [2022-07-12 10:15:26,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327869710] [2022-07-12 10:15:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:26,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:26,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327869710] [2022-07-12 10:15:26,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327869710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:26,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:26,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:15:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279655702] [2022-07-12 10:15:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:26,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:15:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:15:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:15:26,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 174 [2022-07-12 10:15:26,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 174 transitions, 378 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 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) [2022-07-12 10:15:26,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:26,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 174 [2022-07-12 10:15:26,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:26,346 INFO L129 PetriNetUnfolder]: 8/319 cut-off events. [2022-07-12 10:15:26,346 INFO L130 PetriNetUnfolder]: For 53/63 co-relation queries the response was YES. [2022-07-12 10:15:26,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 319 events. 8/319 cut-off events. For 53/63 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 977 event pairs, 1 based on Foata normal form. 106/409 useless extension candidates. Maximal degree in co-relation 224. Up to 16 conditions per place. [2022-07-12 10:15:26,348 INFO L132 encePairwiseOnDemand]: 151/174 looper letters, 3 selfloop transitions, 0 changer transitions 22/150 dead transitions. [2022-07-12 10:15:26,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 342 flow [2022-07-12 10:15:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:15:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:15:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-07-12 10:15:26,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9109195402298851 [2022-07-12 10:15:26,350 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-07-12 10:15:26,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-07-12 10:15:26,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:26,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-07-12 10:15:26,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 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) [2022-07-12 10:15:26,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:26,353 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:15:26,353 INFO L186 Difference]: Start difference. First operand has 155 places, 174 transitions, 378 flow. Second operand 2 states and 317 transitions. [2022-07-12 10:15:26,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 342 flow [2022-07-12 10:15:26,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:26,357 INFO L242 Difference]: Finished difference. Result has 155 places, 128 transitions, 277 flow [2022-07-12 10:15:26,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=277, PETRI_PLACES=155, PETRI_TRANSITIONS=128} [2022-07-12 10:15:26,358 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-07-12 10:15:26,358 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 128 transitions, 277 flow [2022-07-12 10:15:26,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 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) [2022-07-12 10:15:26,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:26,358 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] [2022-07-12 10:15:26,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:15:26,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 298432534, now seen corresponding path program 1 times [2022-07-12 10:15:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836310420] [2022-07-12 10:15:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836310420] [2022-07-12 10:15:26,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836310420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:26,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:26,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:15:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50973428] [2022-07-12 10:15:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:26,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:15:26,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:26,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:15:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:15:26,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 174 [2022-07-12 10:15:26,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 128 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-07-12 10:15:26,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:26,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 174 [2022-07-12 10:15:26,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:26,418 INFO L129 PetriNetUnfolder]: 0/172 cut-off events. [2022-07-12 10:15:26,418 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:15:26,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 172 events. 0/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-12 10:15:26,419 INFO L132 encePairwiseOnDemand]: 171/174 looper letters, 12 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2022-07-12 10:15:26,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 132 transitions, 313 flow [2022-07-12 10:15:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:15:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:15:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2022-07-12 10:15:26,420 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-07-12 10:15:26,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2022-07-12 10:15:26,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2022-07-12 10:15:26,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:26,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2022-07-12 10:15:26,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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) [2022-07-12 10:15:26,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 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) [2022-07-12 10:15:26,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 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) [2022-07-12 10:15:26,423 INFO L186 Difference]: Start difference. First operand has 155 places, 128 transitions, 277 flow. Second operand 3 states and 426 transitions. [2022-07-12 10:15:26,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 132 transitions, 313 flow [2022-07-12 10:15:26,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 132 transitions, 307 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:26,427 INFO L242 Difference]: Finished difference. Result has 139 places, 129 transitions, 283 flow [2022-07-12 10:15:26,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=139, PETRI_TRANSITIONS=129} [2022-07-12 10:15:26,427 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -16 predicate places. [2022-07-12 10:15:26,428 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 129 transitions, 283 flow [2022-07-12 10:15:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-07-12 10:15:26,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:26,428 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] [2022-07-12 10:15:26,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:15:26,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:26,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1411654522, now seen corresponding path program 1 times [2022-07-12 10:15:26,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:26,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870646875] [2022-07-12 10:15:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870646875] [2022-07-12 10:15:26,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870646875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:15:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274276987] [2022-07-12 10:15:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:26,468 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) [2022-07-12 10:15:26,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:15:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:26,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:15:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:15:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:15:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274276987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:15:26,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:15:26,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:15:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559815522] [2022-07-12 10:15:26,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:15:26,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:15:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:15:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:15:26,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 174 [2022-07-12 10:15:26,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 129 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 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) [2022-07-12 10:15:26,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:26,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 174 [2022-07-12 10:15:26,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:26,718 INFO L129 PetriNetUnfolder]: 0/150 cut-off events. [2022-07-12 10:15:26,718 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:15:26,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 150 events. 0/150 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 203 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:15:26,719 INFO L132 encePairwiseOnDemand]: 168/174 looper letters, 13 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2022-07-12 10:15:26,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 139 transitions, 349 flow [2022-07-12 10:15:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:15:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:15:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1248 transitions. [2022-07-12 10:15:26,723 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969348659003831 [2022-07-12 10:15:26,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1248 transitions. [2022-07-12 10:15:26,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1248 transitions. [2022-07-12 10:15:26,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:26,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1248 transitions. [2022-07-12 10:15:26,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 138.66666666666666) internal successors, (1248), 9 states have internal predecessors, (1248), 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) [2022-07-12 10:15:26,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 174.0) internal successors, (1740), 10 states have internal predecessors, (1740), 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) [2022-07-12 10:15:26,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 174.0) internal successors, (1740), 10 states have internal predecessors, (1740), 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) [2022-07-12 10:15:26,731 INFO L186 Difference]: Start difference. First operand has 139 places, 129 transitions, 283 flow. Second operand 9 states and 1248 transitions. [2022-07-12 10:15:26,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 139 transitions, 349 flow [2022-07-12 10:15:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 139 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:15:26,735 INFO L242 Difference]: Finished difference. Result has 149 places, 135 transitions, 331 flow [2022-07-12 10:15:26,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=149, PETRI_TRANSITIONS=135} [2022-07-12 10:15:26,736 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -6 predicate places. [2022-07-12 10:15:26,736 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 135 transitions, 331 flow [2022-07-12 10:15:26,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 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) [2022-07-12 10:15:26,737 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:26,737 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:26,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:15:26,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 10:15:26,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash 592901800, now seen corresponding path program 1 times [2022-07-12 10:15:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:26,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586743357] [2022-07-12 10:15:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:26,989 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:15:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:27,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:15:27,033 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:15:27,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:15:27,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:15:27,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:15:27,034 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:15:27,035 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:15:27,035 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:15:27,053 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:15:27,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2022-07-12 10:15:27,113 INFO L129 PetriNetUnfolder]: 81/557 cut-off events. [2022-07-12 10:15:27,113 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:15:27,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 557 events. 81/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2060 event pairs, 6 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 385. Up to 32 conditions per place. [2022-07-12 10:15:27,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 204 transitions, 452 flow [2022-07-12 10:15:27,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 204 transitions, 452 flow [2022-07-12 10:15:27,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:15:27,128 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@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:15:27,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:15:27,134 INFO L129 PetriNetUnfolder]: 4/81 cut-off events. [2022-07-12 10:15:27,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:27,135 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:27,135 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] [2022-07-12 10:15:27,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1337240350, now seen corresponding path program 1 times [2022-07-12 10:15:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:27,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252550925] [2022-07-12 10:15:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:27,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252550925] [2022-07-12 10:15:27,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252550925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:27,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:27,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:15:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291729991] [2022-07-12 10:15:27,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:15:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:15:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:15:27,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 204 [2022-07-12 10:15:27,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 204 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-07-12 10:15:27,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:27,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 204 [2022-07-12 10:15:27,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:27,266 INFO L129 PetriNetUnfolder]: 20/475 cut-off events. [2022-07-12 10:15:27,267 INFO L130 PetriNetUnfolder]: For 124/195 co-relation queries the response was YES. [2022-07-12 10:15:27,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 475 events. 20/475 cut-off events. For 124/195 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1832 event pairs, 6 based on Foata normal form. 434/885 useless extension candidates. Maximal degree in co-relation 356. Up to 56 conditions per place. [2022-07-12 10:15:27,271 INFO L132 encePairwiseOnDemand]: 172/204 looper letters, 13 selfloop transitions, 2 changer transitions 23/178 dead transitions. [2022-07-12 10:15:27,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 178 transitions, 438 flow [2022-07-12 10:15:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:15:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:15:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2022-07-12 10:15:27,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8709150326797386 [2022-07-12 10:15:27,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2022-07-12 10:15:27,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2022-07-12 10:15:27,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:27,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2022-07-12 10:15:27,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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) [2022-07-12 10:15:27,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2022-07-12 10:15:27,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2022-07-12 10:15:27,277 INFO L186 Difference]: Start difference. First operand has 180 places, 204 transitions, 452 flow. Second operand 3 states and 533 transitions. [2022-07-12 10:15:27,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 178 transitions, 438 flow [2022-07-12 10:15:27,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 178 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:27,282 INFO L242 Difference]: Finished difference. Result has 182 places, 152 transitions, 346 flow [2022-07-12 10:15:27,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=182, PETRI_TRANSITIONS=152} [2022-07-12 10:15:27,283 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, 2 predicate places. [2022-07-12 10:15:27,283 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 152 transitions, 346 flow [2022-07-12 10:15:27,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-07-12 10:15:27,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:27,284 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] [2022-07-12 10:15:27,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:15:27,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2100152094, now seen corresponding path program 1 times [2022-07-12 10:15:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:27,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420436480] [2022-07-12 10:15:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420436480] [2022-07-12 10:15:27,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420436480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:15:27,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632056972] [2022-07-12 10:15:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:27,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:27,323 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) [2022-07-12 10:15:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:15:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:15:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:15:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:27,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:15:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:27,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632056972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:15:27,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:15:27,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:15:27,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502588568] [2022-07-12 10:15:27,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:15:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:15:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:15:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:15:27,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 204 [2022-07-12 10:15:27,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 152 transitions, 346 flow. Second operand has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 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) [2022-07-12 10:15:27,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:27,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 204 [2022-07-12 10:15:27,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:27,598 INFO L129 PetriNetUnfolder]: 0/193 cut-off events. [2022-07-12 10:15:27,599 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:15:27,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 193 events. 0/193 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 344 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:15:27,599 INFO L132 encePairwiseOnDemand]: 198/204 looper letters, 14 selfloop transitions, 9 changer transitions 0/162 dead transitions. [2022-07-12 10:15:27,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 162 transitions, 414 flow [2022-07-12 10:15:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:15:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:15:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1447 transitions. [2022-07-12 10:15:27,604 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7881263616557734 [2022-07-12 10:15:27,604 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1447 transitions. [2022-07-12 10:15:27,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1447 transitions. [2022-07-12 10:15:27,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:27,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1447 transitions. [2022-07-12 10:15:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.77777777777777) internal successors, (1447), 9 states have internal predecessors, (1447), 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) [2022-07-12 10:15:27,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 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) [2022-07-12 10:15:27,614 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 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) [2022-07-12 10:15:27,614 INFO L186 Difference]: Start difference. First operand has 182 places, 152 transitions, 346 flow. Second operand 9 states and 1447 transitions. [2022-07-12 10:15:27,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 162 transitions, 414 flow [2022-07-12 10:15:27,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 162 transitions, 400 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:15:27,617 INFO L242 Difference]: Finished difference. Result has 173 places, 158 transitions, 382 flow [2022-07-12 10:15:27,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-07-12 10:15:27,619 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, -7 predicate places. [2022-07-12 10:15:27,620 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 382 flow [2022-07-12 10:15:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 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) [2022-07-12 10:15:27,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:27,621 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:27,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:15:27,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:27,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2111688101, now seen corresponding path program 1 times [2022-07-12 10:15:27,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:27,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677325283] [2022-07-12 10:15:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:15:27,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677325283] [2022-07-12 10:15:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677325283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:27,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:27,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:15:27,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843654276] [2022-07-12 10:15:27,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:15:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:15:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:15:27,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 204 [2022-07-12 10:15:27,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 158 transitions, 382 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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) [2022-07-12 10:15:27,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:27,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 204 [2022-07-12 10:15:27,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:33,232 INFO L129 PetriNetUnfolder]: 16742/41766 cut-off events. [2022-07-12 10:15:33,233 INFO L130 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-07-12 10:15:33,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64956 conditions, 41766 events. 16742/41766 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 1788. Compared 505221 event pairs, 9176 based on Foata normal form. 750/41852 useless extension candidates. Maximal degree in co-relation 64836. Up to 14189 conditions per place. [2022-07-12 10:15:33,674 INFO L132 encePairwiseOnDemand]: 196/204 looper letters, 31 selfloop transitions, 5 changer transitions 53/222 dead transitions. [2022-07-12 10:15:33,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 222 transitions, 703 flow [2022-07-12 10:15:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:15:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:15:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1099 transitions. [2022-07-12 10:15:33,678 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7696078431372549 [2022-07-12 10:15:33,678 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1099 transitions. [2022-07-12 10:15:33,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1099 transitions. [2022-07-12 10:15:33,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:33,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1099 transitions. [2022-07-12 10:15:33,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 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) [2022-07-12 10:15:33,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 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) [2022-07-12 10:15:33,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 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) [2022-07-12 10:15:33,685 INFO L186 Difference]: Start difference. First operand has 173 places, 158 transitions, 382 flow. Second operand 7 states and 1099 transitions. [2022-07-12 10:15:33,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 222 transitions, 703 flow [2022-07-12 10:15:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 222 transitions, 697 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:15:33,692 INFO L242 Difference]: Finished difference. Result has 183 places, 162 transitions, 433 flow [2022-07-12 10:15:33,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=183, PETRI_TRANSITIONS=162} [2022-07-12 10:15:33,693 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, 3 predicate places. [2022-07-12 10:15:33,694 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 433 flow [2022-07-12 10:15:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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) [2022-07-12 10:15:33,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:33,694 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:15:33,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 205522023, now seen corresponding path program 1 times [2022-07-12 10:15:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878134174] [2022-07-12 10:15:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:33,724 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:15:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:15:33,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:15:33,762 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:15:33,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:15:33,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:15:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:15:33,763 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:15:33,764 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:15:33,764 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:15:33,796 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:15:33,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2022-07-12 10:15:33,903 INFO L129 PetriNetUnfolder]: 140/889 cut-off events. [2022-07-12 10:15:33,903 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:15:33,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 889 events. 140/889 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3925 event pairs, 23 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 602. Up to 80 conditions per place. [2022-07-12 10:15:33,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 528 flow [2022-07-12 10:15:33,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 528 flow [2022-07-12 10:15:33,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:15:33,926 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@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:15:33,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:15:33,931 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2022-07-12 10:15:33,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:15:33,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:33,931 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] [2022-07-12 10:15:33,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1081513932, now seen corresponding path program 1 times [2022-07-12 10:15:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410807114] [2022-07-12 10:15:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410807114] [2022-07-12 10:15:33,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410807114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:33,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:33,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:15:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587269332] [2022-07-12 10:15:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:33,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:15:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:15:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:15:33,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 234 [2022-07-12 10:15:33,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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) [2022-07-12 10:15:33,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:33,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 234 [2022-07-12 10:15:33,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:34,097 INFO L129 PetriNetUnfolder]: 53/780 cut-off events. [2022-07-12 10:15:34,097 INFO L130 PetriNetUnfolder]: For 300/398 co-relation queries the response was YES. [2022-07-12 10:15:34,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 780 events. 53/780 cut-off events. For 300/398 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3634 event pairs, 23 based on Foata normal form. 880/1618 useless extension candidates. Maximal degree in co-relation 580. Up to 110 conditions per place. [2022-07-12 10:15:34,104 INFO L132 encePairwiseOnDemand]: 196/234 looper letters, 14 selfloop transitions, 2 changer transitions 24/202 dead transitions. [2022-07-12 10:15:34,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 202 transitions, 506 flow [2022-07-12 10:15:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:15:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:15:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-07-12 10:15:34,106 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8646723646723646 [2022-07-12 10:15:34,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-07-12 10:15:34,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-07-12 10:15:34,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:34,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-07-12 10:15:34,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2022-07-12 10:15:34,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 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) [2022-07-12 10:15:34,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 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) [2022-07-12 10:15:34,110 INFO L186 Difference]: Start difference. First operand has 205 places, 234 transitions, 528 flow. Second operand 3 states and 607 transitions. [2022-07-12 10:15:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 202 transitions, 506 flow [2022-07-12 10:15:34,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 202 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:15:34,116 INFO L242 Difference]: Finished difference. Result has 207 places, 175 transitions, 405 flow [2022-07-12 10:15:34,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=405, PETRI_PLACES=207, PETRI_TRANSITIONS=175} [2022-07-12 10:15:34,117 INFO L279 CegarLoopForPetriNet]: 205 programPoint places, 2 predicate places. [2022-07-12 10:15:34,117 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 175 transitions, 405 flow [2022-07-12 10:15:34,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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) [2022-07-12 10:15:34,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:34,118 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] [2022-07-12 10:15:34,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:15:34,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1216079448, now seen corresponding path program 1 times [2022-07-12 10:15:34,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:34,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171323464] [2022-07-12 10:15:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:34,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171323464] [2022-07-12 10:15:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171323464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:15:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013159806] [2022-07-12 10:15:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:34,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:15:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:15:34,168 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) [2022-07-12 10:15:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:15:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:34,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:15:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:15:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:34,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:15:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:15:34,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013159806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:15:34,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:15:34,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:15:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746325638] [2022-07-12 10:15:34,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:15:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:15:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:15:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:15:34,326 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 234 [2022-07-12 10:15:34,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 175 transitions, 405 flow. Second operand has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 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) [2022-07-12 10:15:34,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:34,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 234 [2022-07-12 10:15:34,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:15:34,429 INFO L129 PetriNetUnfolder]: 0/236 cut-off events. [2022-07-12 10:15:34,429 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-12 10:15:34,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 236 events. 0/236 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 489 event pairs, 0 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:15:34,430 INFO L132 encePairwiseOnDemand]: 228/234 looper letters, 15 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-07-12 10:15:34,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 185 transitions, 475 flow [2022-07-12 10:15:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:15:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:15:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1646 transitions. [2022-07-12 10:15:34,501 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7815764482431149 [2022-07-12 10:15:34,501 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1646 transitions. [2022-07-12 10:15:34,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1646 transitions. [2022-07-12 10:15:34,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:15:34,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1646 transitions. [2022-07-12 10:15:34,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.88888888888889) internal successors, (1646), 9 states have internal predecessors, (1646), 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) [2022-07-12 10:15:34,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 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) [2022-07-12 10:15:34,511 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 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) [2022-07-12 10:15:34,511 INFO L186 Difference]: Start difference. First operand has 207 places, 175 transitions, 405 flow. Second operand 9 states and 1646 transitions. [2022-07-12 10:15:34,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 185 transitions, 475 flow [2022-07-12 10:15:34,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 185 transitions, 453 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-12 10:15:34,516 INFO L242 Difference]: Finished difference. Result has 198 places, 181 transitions, 433 flow [2022-07-12 10:15:34,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=433, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2022-07-12 10:15:34,518 INFO L279 CegarLoopForPetriNet]: 205 programPoint places, -7 predicate places. [2022-07-12 10:15:34,518 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 433 flow [2022-07-12 10:15:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 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) [2022-07-12 10:15:34,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:15:34,519 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:15:34,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:15:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:15:34,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:15:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:15:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -448216797, now seen corresponding path program 1 times [2022-07-12 10:15:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:15:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164998624] [2022-07-12 10:15:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:15:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:15:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:15:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:15:34,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:15:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164998624] [2022-07-12 10:15:34,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164998624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:15:34,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:15:34,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:15:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181689884] [2022-07-12 10:15:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:15:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:15:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:15:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:15:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:15:34,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 234 [2022-07-12 10:15:34,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 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) [2022-07-12 10:15:34,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:15:34,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 234 [2022-07-12 10:15:34,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:03,420 INFO L129 PetriNetUnfolder]: 110509/244943 cut-off events. [2022-07-12 10:16:03,420 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-07-12 10:16:05,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389200 conditions, 244943 events. 110509/244943 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8950. Compared 3336824 event pairs, 76730 based on Foata normal form. 3875/246557 useless extension candidates. Maximal degree in co-relation 247676. Up to 88950 conditions per place. [2022-07-12 10:16:07,049 INFO L132 encePairwiseOnDemand]: 225/234 looper letters, 38 selfloop transitions, 6 changer transitions 65/260 dead transitions. [2022-07-12 10:16:07,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 260 transitions, 829 flow [2022-07-12 10:16:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:16:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:16:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1245 transitions. [2022-07-12 10:16:07,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76007326007326 [2022-07-12 10:16:07,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1245 transitions. [2022-07-12 10:16:07,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1245 transitions. [2022-07-12 10:16:07,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:07,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1245 transitions. [2022-07-12 10:16:07,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.85714285714286) internal successors, (1245), 7 states have internal predecessors, (1245), 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) [2022-07-12 10:16:07,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 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) [2022-07-12 10:16:07,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 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) [2022-07-12 10:16:07,061 INFO L186 Difference]: Start difference. First operand has 198 places, 181 transitions, 433 flow. Second operand 7 states and 1245 transitions. [2022-07-12 10:16:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 260 transitions, 829 flow [2022-07-12 10:16:07,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 260 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:07,070 INFO L242 Difference]: Finished difference. Result has 208 places, 186 transitions, 495 flow [2022-07-12 10:16:07,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=208, PETRI_TRANSITIONS=186} [2022-07-12 10:16:07,072 INFO L279 CegarLoopForPetriNet]: 205 programPoint places, 3 predicate places. [2022-07-12 10:16:07,072 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 186 transitions, 495 flow [2022-07-12 10:16:07,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 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) [2022-07-12 10:16:07,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:07,083 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:07,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:16:07,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash -42916211, now seen corresponding path program 1 times [2022-07-12 10:16:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:07,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818943800] [2022-07-12 10:16:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:07,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818943800] [2022-07-12 10:16:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818943800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230490291] [2022-07-12 10:16:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:07,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:07,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:16:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:07,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230490291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:07,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:07,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873921935] [2022-07-12 10:16:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:07,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 234 [2022-07-12 10:16:07,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 186 transitions, 495 flow. Second operand has 18 states, 18 states have (on average 182.61111111111111) internal successors, (3287), 18 states have internal predecessors, (3287), 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) [2022-07-12 10:16:07,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:07,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 234 [2022-07-12 10:16:07,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:07,720 INFO L129 PetriNetUnfolder]: 49/642 cut-off events. [2022-07-12 10:16:07,721 INFO L130 PetriNetUnfolder]: For 109/277 co-relation queries the response was YES. [2022-07-12 10:16:07,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 642 events. 49/642 cut-off events. For 109/277 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3339 event pairs, 23 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 958. Up to 81 conditions per place. [2022-07-12 10:16:07,731 INFO L132 encePairwiseOnDemand]: 229/234 looper letters, 18 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2022-07-12 10:16:07,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 190 transitions, 583 flow [2022-07-12 10:16:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:16:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:16:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3277 transitions. [2022-07-12 10:16:07,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7780151946818613 [2022-07-12 10:16:07,739 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3277 transitions. [2022-07-12 10:16:07,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3277 transitions. [2022-07-12 10:16:07,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:07,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3277 transitions. [2022-07-12 10:16:07,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 182.05555555555554) internal successors, (3277), 18 states have internal predecessors, (3277), 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) [2022-07-12 10:16:07,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 234.0) internal successors, (4446), 19 states have internal predecessors, (4446), 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) [2022-07-12 10:16:07,756 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 234.0) internal successors, (4446), 19 states have internal predecessors, (4446), 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) [2022-07-12 10:16:07,756 INFO L186 Difference]: Start difference. First operand has 208 places, 186 transitions, 495 flow. Second operand 18 states and 3277 transitions. [2022-07-12 10:16:07,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 190 transitions, 583 flow [2022-07-12 10:16:07,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 190 transitions, 546 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-12 10:16:07,761 INFO L242 Difference]: Finished difference. Result has 204 places, 181 transitions, 482 flow [2022-07-12 10:16:07,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=482, PETRI_PLACES=204, PETRI_TRANSITIONS=181} [2022-07-12 10:16:07,762 INFO L279 CegarLoopForPetriNet]: 205 programPoint places, -1 predicate places. [2022-07-12 10:16:07,762 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 181 transitions, 482 flow [2022-07-12 10:16:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.61111111111111) internal successors, (3287), 18 states have internal predecessors, (3287), 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) [2022-07-12 10:16:07,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:07,764 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:07,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:16:07,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1324144899, now seen corresponding path program 1 times [2022-07-12 10:16:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227038813] [2022-07-12 10:16:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:08,003 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:08,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:08,026 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:08,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:08,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:08,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:16:08,027 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:08,027 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:08,027 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:16:08,054 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:16:08,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 230 places, 264 transitions, 606 flow [2022-07-12 10:16:08,286 INFO L129 PetriNetUnfolder]: 263/1509 cut-off events. [2022-07-12 10:16:08,286 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-12 10:16:08,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 1509 events. 263/1509 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8424 event pairs, 72 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 988. Up to 192 conditions per place. [2022-07-12 10:16:08,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 264 transitions, 606 flow [2022-07-12 10:16:08,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 264 transitions, 606 flow [2022-07-12 10:16:08,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:08,330 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@478c420c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11ad7117 [2022-07-12 10:16:08,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:08,334 INFO L129 PetriNetUnfolder]: 3/81 cut-off events. [2022-07-12 10:16:08,335 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:08,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:08,335 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] [2022-07-12 10:16:08,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash 761712147, now seen corresponding path program 1 times [2022-07-12 10:16:08,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:08,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308372919] [2022-07-12 10:16:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:08,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308372919] [2022-07-12 10:16:08,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308372919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:08,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:08,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203303648] [2022-07-12 10:16:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:08,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:08,354 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 264 [2022-07-12 10:16:08,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 606 flow. Second operand has 2 states, 2 states have (on average 210.5) internal successors, (421), 2 states have internal predecessors, (421), 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) [2022-07-12 10:16:08,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:08,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 264 [2022-07-12 10:16:08,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:08,538 INFO L129 PetriNetUnfolder]: 135/1374 cut-off events. [2022-07-12 10:16:08,538 INFO L130 PetriNetUnfolder]: For 652/680 co-relation queries the response was YES. [2022-07-12 10:16:08,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 1374 events. 135/1374 cut-off events. For 652/680 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8042 event pairs, 72 based on Foata normal form. 1314/2610 useless extension candidates. Maximal degree in co-relation 981. Up to 199 conditions per place. [2022-07-12 10:16:08,550 INFO L132 encePairwiseOnDemand]: 223/264 looper letters, 6 selfloop transitions, 0 changer transitions 25/222 dead transitions. [2022-07-12 10:16:08,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 222 transitions, 546 flow [2022-07-12 10:16:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 473 transitions. [2022-07-12 10:16:08,552 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2022-07-12 10:16:08,552 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 473 transitions. [2022-07-12 10:16:08,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 473 transitions. [2022-07-12 10:16:08,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:08,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 473 transitions. [2022-07-12 10:16:08,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 236.5) internal successors, (473), 2 states have internal predecessors, (473), 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) [2022-07-12 10:16:08,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 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) [2022-07-12 10:16:08,555 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 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) [2022-07-12 10:16:08,555 INFO L186 Difference]: Start difference. First operand has 230 places, 264 transitions, 606 flow. Second operand 2 states and 473 transitions. [2022-07-12 10:16:08,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 222 transitions, 546 flow [2022-07-12 10:16:08,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 222 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:08,560 INFO L242 Difference]: Finished difference. Result has 230 places, 197 transitions, 454 flow [2022-07-12 10:16:08,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=454, PETRI_PLACES=230, PETRI_TRANSITIONS=197} [2022-07-12 10:16:08,561 INFO L279 CegarLoopForPetriNet]: 230 programPoint places, 0 predicate places. [2022-07-12 10:16:08,561 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 197 transitions, 454 flow [2022-07-12 10:16:08,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 210.5) internal successors, (421), 2 states have internal predecessors, (421), 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) [2022-07-12 10:16:08,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:08,562 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] [2022-07-12 10:16:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:16:08,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1035239212, now seen corresponding path program 1 times [2022-07-12 10:16:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378740370] [2022-07-12 10:16:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:08,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378740370] [2022-07-12 10:16:08,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378740370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:08,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:08,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:08,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079063928] [2022-07-12 10:16:08,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:08,584 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 264 [2022-07-12 10:16:08,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 197 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2022-07-12 10:16:08,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:08,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 264 [2022-07-12 10:16:08,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:08,637 INFO L129 PetriNetUnfolder]: 0/301 cut-off events. [2022-07-12 10:16:08,637 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:16:08,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 301 events. 0/301 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 759 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:16:08,638 INFO L132 encePairwiseOnDemand]: 261/264 looper letters, 15 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2022-07-12 10:16:08,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 201 transitions, 496 flow [2022-07-12 10:16:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2022-07-12 10:16:08,640 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916666666666666 [2022-07-12 10:16:08,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2022-07-12 10:16:08,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2022-07-12 10:16:08,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:08,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2022-07-12 10:16:08,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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) [2022-07-12 10:16:08,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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) [2022-07-12 10:16:08,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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) [2022-07-12 10:16:08,644 INFO L186 Difference]: Start difference. First operand has 230 places, 197 transitions, 454 flow. Second operand 3 states and 627 transitions. [2022-07-12 10:16:08,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 201 transitions, 496 flow [2022-07-12 10:16:08,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 201 transitions, 466 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:08,648 INFO L242 Difference]: Finished difference. Result has 214 places, 198 transitions, 436 flow [2022-07-12 10:16:08,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=436, PETRI_PLACES=214, PETRI_TRANSITIONS=198} [2022-07-12 10:16:08,649 INFO L279 CegarLoopForPetriNet]: 230 programPoint places, -16 predicate places. [2022-07-12 10:16:08,649 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 198 transitions, 436 flow [2022-07-12 10:16:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2022-07-12 10:16:08,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:08,650 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] [2022-07-12 10:16:08,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:16:08,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -231094836, now seen corresponding path program 1 times [2022-07-12 10:16:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393414150] [2022-07-12 10:16:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:08,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393414150] [2022-07-12 10:16:08,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393414150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578071525] [2022-07-12 10:16:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:08,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:08,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:08,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:08,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:16:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:08,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:08,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578071525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:08,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:08,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951705135] [2022-07-12 10:16:08,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:08,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 264 [2022-07-12 10:16:08,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 198 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 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) [2022-07-12 10:16:08,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:08,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 264 [2022-07-12 10:16:08,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:09,036 INFO L129 PetriNetUnfolder]: 0/279 cut-off events. [2022-07-12 10:16:09,036 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:16:09,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 279 events. 0/279 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 632 event pairs, 0 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:09,037 INFO L132 encePairwiseOnDemand]: 258/264 looper letters, 16 selfloop transitions, 9 changer transitions 0/208 dead transitions. [2022-07-12 10:16:09,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 208 transitions, 508 flow [2022-07-12 10:16:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1845 transitions. [2022-07-12 10:16:09,041 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765151515151515 [2022-07-12 10:16:09,041 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1845 transitions. [2022-07-12 10:16:09,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1845 transitions. [2022-07-12 10:16:09,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:09,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1845 transitions. [2022-07-12 10:16:09,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 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) [2022-07-12 10:16:09,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 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) [2022-07-12 10:16:09,049 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 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) [2022-07-12 10:16:09,049 INFO L186 Difference]: Start difference. First operand has 214 places, 198 transitions, 436 flow. Second operand 9 states and 1845 transitions. [2022-07-12 10:16:09,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 208 transitions, 508 flow [2022-07-12 10:16:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 208 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:09,054 INFO L242 Difference]: Finished difference. Result has 224 places, 204 transitions, 484 flow [2022-07-12 10:16:09,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=224, PETRI_TRANSITIONS=204} [2022-07-12 10:16:09,055 INFO L279 CegarLoopForPetriNet]: 230 programPoint places, -6 predicate places. [2022-07-12 10:16:09,055 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 204 transitions, 484 flow [2022-07-12 10:16:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 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) [2022-07-12 10:16:09,056 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:09,056 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:09,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:09,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 715594367, now seen corresponding path program 1 times [2022-07-12 10:16:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257574896] [2022-07-12 10:16:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:09,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 10:16:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257574896] [2022-07-12 10:16:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257574896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:09,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:16:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067272142] [2022-07-12 10:16:09,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:09,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:16:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:16:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:16:09,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 264 [2022-07-12 10:16:09,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 204 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 181.6) internal successors, (908), 5 states have internal predecessors, (908), 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) [2022-07-12 10:16:09,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:09,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 264 [2022-07-12 10:16:09,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand