./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:36:02,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:36:02,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:36:02,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:36:02,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:36:02,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:36:02,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:36:02,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:36:02,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:36:02,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:36:02,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:36:02,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:36:02,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:36:02,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:36:02,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:36:02,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:36:02,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:36:02,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:36:02,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:36:02,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:36:02,927 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:36:02,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:36:02,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:36:02,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:36:02,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:36:02,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:36:02,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:36:02,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:36:02,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:36:02,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:36:02,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:36:02,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:36:02,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:36:02,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:36:02,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:36:02,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:36:02,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:36:02,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:36:02,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:36:02,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:36:02,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:36:02,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:36:02,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:36:02,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:36:02,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:36:02,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:36:02,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:36:02,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:36:02,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:36:02,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:36:02,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:36:02,980 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:36:02,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:36:02,985 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:36:02,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:36:02,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:36:02,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:36:02,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:36:02,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:36:02,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:36:02,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:36:02,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:36:02,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:36:02,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:36:02,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:36:02,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:36:02,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:36:02,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:36:02,989 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:36:02,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:36:02,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:36:02,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-07-21 08:36:03,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:36:03,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:36:03,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:36:03,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:36:03,281 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:36:03,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-07-21 08:36:03,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a1fb7e1/7206dc63bb76436f8155a2971f562bc4/FLAGb86af9bb9 [2022-07-21 08:36:03,771 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:36:03,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-07-21 08:36:03,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a1fb7e1/7206dc63bb76436f8155a2971f562bc4/FLAGb86af9bb9 [2022-07-21 08:36:03,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2a1fb7e1/7206dc63bb76436f8155a2971f562bc4 [2022-07-21 08:36:03,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:36:03,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:36:03,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:36:03,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:36:03,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:36:03,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:03" (1/1) ... [2022-07-21 08:36:03,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a356fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:03, skipping insertion in model container [2022-07-21 08:36:03,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:36:03" (1/1) ... [2022-07-21 08:36:03,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:36:03,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:36:04,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-07-21 08:36:04,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:36:04,166 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:36:04,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-07-21 08:36:04,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:36:04,227 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:36:04,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04 WrapperNode [2022-07-21 08:36:04,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:36:04,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:36:04,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:36:04,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:36:04,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,254 INFO L137 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-07-21 08:36:04,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:36:04,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:36:04,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:36:04,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:36:04,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:36:04,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:36:04,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:36:04,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:36:04,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (1/1) ... [2022-07-21 08:36:04,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:36:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:36:04,295 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) [2022-07-21 08:36:04,312 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 [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:36:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:36:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:36:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:36:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:36:04,335 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:36:04,443 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:36:04,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:36:04,585 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:36:04,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:36:04,611 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 08:36:04,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:04 BoogieIcfgContainer [2022-07-21 08:36:04,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:36:04,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:36:04,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:36:04,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:36:04,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:36:03" (1/3) ... [2022-07-21 08:36:04,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c387028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:04, skipping insertion in model container [2022-07-21 08:36:04,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:36:04" (2/3) ... [2022-07-21 08:36:04,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c387028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:36:04, skipping insertion in model container [2022-07-21 08:36:04,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:36:04" (3/3) ... [2022-07-21 08:36:04,620 INFO L111 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-07-21 08:36:04,626 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:36:04,633 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:36:04,633 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:36:04,633 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:36:04,665 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:04,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-07-21 08:36:04,726 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-21 08:36:04,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:36:04,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-07-21 08:36:04,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 89 flow [2022-07-21 08:36:04,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 89 flow [2022-07-21 08:36:04,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:04,749 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:04,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:36:04,763 INFO L129 PetriNetUnfolder]: 3/45 cut-off events. [2022-07-21 08:36:04,763 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:36:04,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:04,764 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] [2022-07-21 08:36:04,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:36:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 420207741, now seen corresponding path program 1 times [2022-07-21 08:36:04,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034523221] [2022-07-21 08:36:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:04,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:04,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034523221] [2022-07-21 08:36:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034523221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:04,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:04,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298088637] [2022-07-21 08:36:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:05,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:05,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 42 [2022-07-21 08:36:05,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 08:36:05,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:05,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 42 [2022-07-21 08:36:05,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:05,030 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2022-07-21 08:36:05,030 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:36:05,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 0/35 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 6/41 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:36:05,032 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 4 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2022-07-21 08:36:05,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 81 flow [2022-07-21 08:36:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2022-07-21 08:36:05,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-07-21 08:36:05,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2022-07-21 08:36:05,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2022-07-21 08:36:05,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:05,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2022-07-21 08:36:05,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-07-21 08:36:05,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2022-07-21 08:36:05,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2022-07-21 08:36:05,049 INFO L186 Difference]: Start difference. First operand has 43 places, 42 transitions, 89 flow. Second operand 3 states and 102 transitions. [2022-07-21 08:36:05,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 81 flow [2022-07-21 08:36:05,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 81 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:05,052 INFO L242 Difference]: Finished difference. Result has 36 places, 31 transitions, 73 flow [2022-07-21 08:36:05,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-07-21 08:36:05,056 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2022-07-21 08:36:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 73 flow [2022-07-21 08:36:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-07-21 08:36:05,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,057 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] [2022-07-21 08:36:05,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:36:05,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:36:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1612868083, now seen corresponding path program 1 times [2022-07-21 08:36:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104892540] [2022-07-21 08:36:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,077 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:05,100 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:05,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:36:05,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:36:05,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:36:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:36:05,104 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:36:05,105 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:05,105 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:36:05,114 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:05,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-07-21 08:36:05,124 INFO L129 PetriNetUnfolder]: 5/79 cut-off events. [2022-07-21 08:36:05,125 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:36:05,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-07-21 08:36:05,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-07-21 08:36:05,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-07-21 08:36:05,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:05,128 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:05,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:36:05,133 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-21 08:36:05,133 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:36:05,133 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,134 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] [2022-07-21 08:36:05,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:36:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138409, now seen corresponding path program 1 times [2022-07-21 08:36:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936705578] [2022-07-21 08:36:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:05,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936705578] [2022-07-21 08:36:05,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936705578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:05,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:05,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:05,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794047892] [2022-07-21 08:36:05,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:05,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 55 [2022-07-21 08:36:05,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-21 08:36:05,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:05,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 55 [2022-07-21 08:36:05,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:05,267 INFO L129 PetriNetUnfolder]: 34/156 cut-off events. [2022-07-21 08:36:05,269 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-21 08:36:05,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 156 events. 34/156 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 556 event pairs, 13 based on Foata normal form. 65/216 useless extension candidates. Maximal degree in co-relation 116. Up to 69 conditions per place. [2022-07-21 08:36:05,272 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 21 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2022-07-21 08:36:05,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 179 flow [2022-07-21 08:36:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2022-07-21 08:36:05,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-21 08:36:05,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2022-07-21 08:36:05,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2022-07-21 08:36:05,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:05,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2022-07-21 08:36:05,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2022-07-21 08:36:05,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2022-07-21 08:36:05,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2022-07-21 08:36:05,279 INFO L186 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 3 states and 138 transitions. [2022-07-21 08:36:05,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 179 flow [2022-07-21 08:36:05,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 177 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:05,282 INFO L242 Difference]: Finished difference. Result has 53 places, 48 transitions, 138 flow [2022-07-21 08:36:05,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2022-07-21 08:36:05,283 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-07-21 08:36:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 138 flow [2022-07-21 08:36:05,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-21 08:36:05,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,284 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:05,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:36:05,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:36:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash -170461533, now seen corresponding path program 1 times [2022-07-21 08:36:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625059428] [2022-07-21 08:36:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,321 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:05,341 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:05,342 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:36:05,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:36:05,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:36:05,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:36:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:36:05,343 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:36:05,344 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:05,344 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:36:05,363 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:05,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-07-21 08:36:05,380 INFO L129 PetriNetUnfolder]: 7/105 cut-off events. [2022-07-21 08:36:05,380 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:36:05,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 199 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-07-21 08:36:05,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 68 transitions, 157 flow [2022-07-21 08:36:05,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 68 transitions, 157 flow [2022-07-21 08:36:05,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:05,387 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:05,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:36:05,390 INFO L129 PetriNetUnfolder]: 2/43 cut-off events. [2022-07-21 08:36:05,390 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:36:05,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,390 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] [2022-07-21 08:36:05,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:36:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -181385483, now seen corresponding path program 1 times [2022-07-21 08:36:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067508903] [2022-07-21 08:36:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:05,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:05,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067508903] [2022-07-21 08:36:05,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067508903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:05,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:05,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:05,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874439801] [2022-07-21 08:36:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:05,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:05,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:05,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 68 [2022-07-21 08:36:05,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-21 08:36:05,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:05,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 68 [2022-07-21 08:36:05,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:05,615 INFO L129 PetriNetUnfolder]: 627/1384 cut-off events. [2022-07-21 08:36:05,616 INFO L130 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2022-07-21 08:36:05,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 1384 events. 627/1384 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8862 event pairs, 258 based on Foata normal form. 614/1933 useless extension candidates. Maximal degree in co-relation 1329. Up to 757 conditions per place. [2022-07-21 08:36:05,625 INFO L132 encePairwiseOnDemand]: 53/68 looper letters, 32 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-07-21 08:36:05,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 255 flow [2022-07-21 08:36:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2022-07-21 08:36:05,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137254901960784 [2022-07-21 08:36:05,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2022-07-21 08:36:05,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2022-07-21 08:36:05,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:05,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2022-07-21 08:36:05,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2022-07-21 08:36:05,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2022-07-21 08:36:05,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2022-07-21 08:36:05,639 INFO L186 Difference]: Start difference. First operand has 71 places, 68 transitions, 157 flow. Second operand 3 states and 166 transitions. [2022-07-21 08:36:05,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 255 flow [2022-07-21 08:36:05,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 247 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:05,642 INFO L242 Difference]: Finished difference. Result has 66 places, 61 transitions, 183 flow [2022-07-21 08:36:05,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2022-07-21 08:36:05,644 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2022-07-21 08:36:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 183 flow [2022-07-21 08:36:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-21 08:36:05,644 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,644 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] [2022-07-21 08:36:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:36:05,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:36:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1585935522, now seen corresponding path program 1 times [2022-07-21 08:36:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917318535] [2022-07-21 08:36:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:05,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917318535] [2022-07-21 08:36:05,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917318535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:05,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:05,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472334657] [2022-07-21 08:36:05,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:05,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:05,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:05,725 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 68 [2022-07-21 08:36:05,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-21 08:36:05,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:05,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 68 [2022-07-21 08:36:05,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:05,767 INFO L129 PetriNetUnfolder]: 15/160 cut-off events. [2022-07-21 08:36:05,769 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-21 08:36:05,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 160 events. 15/160 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 537 event pairs, 10 based on Foata normal form. 14/173 useless extension candidates. Maximal degree in co-relation 253. Up to 26 conditions per place. [2022-07-21 08:36:05,770 INFO L132 encePairwiseOnDemand]: 62/68 looper letters, 6 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-07-21 08:36:05,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 179 flow [2022-07-21 08:36:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2022-07-21 08:36:05,771 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8088235294117647 [2022-07-21 08:36:05,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2022-07-21 08:36:05,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2022-07-21 08:36:05,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:05,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2022-07-21 08:36:05,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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) [2022-07-21 08:36:05,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2022-07-21 08:36:05,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 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) [2022-07-21 08:36:05,773 INFO L186 Difference]: Start difference. First operand has 66 places, 61 transitions, 183 flow. Second operand 3 states and 165 transitions. [2022-07-21 08:36:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 179 flow [2022-07-21 08:36:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:36:05,778 INFO L242 Difference]: Finished difference. Result has 58 places, 49 transitions, 125 flow [2022-07-21 08:36:05,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-07-21 08:36:05,781 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2022-07-21 08:36:05,781 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 125 flow [2022-07-21 08:36:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-21 08:36:05,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,782 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:36:05,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:36:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash -511346355, now seen corresponding path program 1 times [2022-07-21 08:36:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750375712] [2022-07-21 08:36:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,811 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:05,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:05,850 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:05,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:36:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:36:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:36:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:36:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:36:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:36:05,852 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:36:05,852 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:05,852 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:36:05,879 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:05,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-07-21 08:36:05,891 INFO L129 PetriNetUnfolder]: 9/131 cut-off events. [2022-07-21 08:36:05,892 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:36:05,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-07-21 08:36:05,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 194 flow [2022-07-21 08:36:05,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 81 transitions, 194 flow [2022-07-21 08:36:05,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:05,902 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:05,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:36:05,905 INFO L129 PetriNetUnfolder]: 3/46 cut-off events. [2022-07-21 08:36:05,905 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:36:05,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:05,906 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] [2022-07-21 08:36:05,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:36:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1823606305, now seen corresponding path program 1 times [2022-07-21 08:36:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:05,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933151365] [2022-07-21 08:36:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933151365] [2022-07-21 08:36:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933151365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:05,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:05,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307895743] [2022-07-21 08:36:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:05,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:05,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-07-21 08:36:05,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2022-07-21 08:36:05,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:05,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-07-21 08:36:05,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:07,058 INFO L129 PetriNetUnfolder]: 7843/13496 cut-off events. [2022-07-21 08:36:07,060 INFO L130 PetriNetUnfolder]: For 4465/4465 co-relation queries the response was YES. [2022-07-21 08:36:07,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27376 conditions, 13496 events. 7843/13496 cut-off events. For 4465/4465 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 108072 event pairs, 4364 based on Foata normal form. 5503/18417 useless extension candidates. Maximal degree in co-relation 21779. Up to 7424 conditions per place. [2022-07-21 08:36:07,168 INFO L132 encePairwiseOnDemand]: 62/81 looper letters, 43 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2022-07-21 08:36:07,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 335 flow [2022-07-21 08:36:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-07-21 08:36:07,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2022-07-21 08:36:07,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:07,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-07-21 08:36:07,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2022-07-21 08:36:07,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2022-07-21 08:36:07,173 INFO L186 Difference]: Start difference. First operand has 85 places, 81 transitions, 194 flow. Second operand 3 states and 194 transitions. [2022-07-21 08:36:07,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 335 flow [2022-07-21 08:36:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 317 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:07,177 INFO L242 Difference]: Finished difference. Result has 79 places, 74 transitions, 228 flow [2022-07-21 08:36:07,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2022-07-21 08:36:07,178 INFO L279 CegarLoopForPetriNet]: 85 programPoint places, -6 predicate places. [2022-07-21 08:36:07,178 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 228 flow [2022-07-21 08:36:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2022-07-21 08:36:07,179 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:07,179 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] [2022-07-21 08:36:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:36:07,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:36:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 643974404, now seen corresponding path program 1 times [2022-07-21 08:36:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:07,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525611565] [2022-07-21 08:36:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:36:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525611565] [2022-07-21 08:36:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525611565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:07,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:07,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257067355] [2022-07-21 08:36:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:07,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:07,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:07,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2022-07-21 08:36:07,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-07-21 08:36:07,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:07,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2022-07-21 08:36:07,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:07,269 INFO L129 PetriNetUnfolder]: 51/404 cut-off events. [2022-07-21 08:36:07,270 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-21 08:36:07,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 404 events. 51/404 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2269 event pairs, 18 based on Foata normal form. 62/466 useless extension candidates. Maximal degree in co-relation 439. Up to 66 conditions per place. [2022-07-21 08:36:07,272 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 8 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2022-07-21 08:36:07,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 225 flow [2022-07-21 08:36:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-07-21 08:36:07,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2022-07-21 08:36:07,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:07,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-07-21 08:36:07,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-07-21 08:36:07,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2022-07-21 08:36:07,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2022-07-21 08:36:07,275 INFO L186 Difference]: Start difference. First operand has 79 places, 74 transitions, 228 flow. Second operand 3 states and 194 transitions. [2022-07-21 08:36:07,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 61 transitions, 225 flow [2022-07-21 08:36:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:36:07,279 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 152 flow [2022-07-21 08:36:07,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-07-21 08:36:07,280 INFO L279 CegarLoopForPetriNet]: 85 programPoint places, -16 predicate places. [2022-07-21 08:36:07,281 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 152 flow [2022-07-21 08:36:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-07-21 08:36:07,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:07,281 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:07,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:36:07,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:36:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 604232154, now seen corresponding path program 1 times [2022-07-21 08:36:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:07,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835927518] [2022-07-21 08:36:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:07,308 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:07,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:07,331 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:07,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:36:07,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:36:07,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:36:07,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:36:07,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:36:07,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:36:07,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:36:07,332 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:36:07,333 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:07,333 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:36:07,354 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:07,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-07-21 08:36:07,363 INFO L129 PetriNetUnfolder]: 11/157 cut-off events. [2022-07-21 08:36:07,364 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:36:07,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-07-21 08:36:07,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 233 flow [2022-07-21 08:36:07,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 94 transitions, 233 flow [2022-07-21 08:36:07,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:07,368 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:07,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:36:07,371 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-21 08:36:07,371 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:36:07,372 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:07,372 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] [2022-07-21 08:36:07,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:36:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1674142061, now seen corresponding path program 1 times [2022-07-21 08:36:07,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:07,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727594660] [2022-07-21 08:36:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:07,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:07,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:07,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727594660] [2022-07-21 08:36:07,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727594660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:07,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:07,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814037907] [2022-07-21 08:36:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:07,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 94 [2022-07-21 08:36:07,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2022-07-21 08:36:07,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:07,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 94 [2022-07-21 08:36:07,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:15,442 INFO L129 PetriNetUnfolder]: 82238/124956 cut-off events. [2022-07-21 08:36:15,443 INFO L130 PetriNetUnfolder]: For 53459/53459 co-relation queries the response was YES. [2022-07-21 08:36:16,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257675 conditions, 124956 events. 82238/124956 cut-off events. For 53459/53459 co-relation queries the response was YES. Maximal size of possible extension queue 5112. Compared 1097890 event pairs, 45221 based on Foata normal form. 46598/165414 useless extension candidates. Maximal degree in co-relation 204173. Up to 67130 conditions per place. [2022-07-21 08:36:17,067 INFO L132 encePairwiseOnDemand]: 71/94 looper letters, 54 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2022-07-21 08:36:17,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 419 flow [2022-07-21 08:36:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-07-21 08:36:17,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7872340425531915 [2022-07-21 08:36:17,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-07-21 08:36:17,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-07-21 08:36:17,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:17,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-07-21 08:36:17,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2022-07-21 08:36:17,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2022-07-21 08:36:17,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2022-07-21 08:36:17,073 INFO L186 Difference]: Start difference. First operand has 99 places, 94 transitions, 233 flow. Second operand 3 states and 222 transitions. [2022-07-21 08:36:17,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 419 flow [2022-07-21 08:36:17,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 106 transitions, 387 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-07-21 08:36:17,098 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 273 flow [2022-07-21 08:36:17,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-07-21 08:36:17,099 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-07-21 08:36:17,099 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 273 flow [2022-07-21 08:36:17,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2022-07-21 08:36:17,099 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:17,099 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] [2022-07-21 08:36:17,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:36:17,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:36:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019936, now seen corresponding path program 1 times [2022-07-21 08:36:17,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575126085] [2022-07-21 08:36:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:17,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:36:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575126085] [2022-07-21 08:36:17,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575126085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:17,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:17,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:17,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096061639] [2022-07-21 08:36:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:17,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:17,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:17,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:17,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 94 [2022-07-21 08:36:17,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-07-21 08:36:17,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:17,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 94 [2022-07-21 08:36:17,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:36:17,226 INFO L129 PetriNetUnfolder]: 147/938 cut-off events. [2022-07-21 08:36:17,226 INFO L130 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2022-07-21 08:36:17,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 938 events. 147/938 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7056 event pairs, 69 based on Foata normal form. 222/1160 useless extension candidates. Maximal degree in co-relation 1132. Up to 178 conditions per place. [2022-07-21 08:36:17,233 INFO L132 encePairwiseOnDemand]: 84/94 looper letters, 10 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-07-21 08:36:17,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 271 flow [2022-07-21 08:36:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:36:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:36:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-07-21 08:36:17,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7907801418439716 [2022-07-21 08:36:17,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-07-21 08:36:17,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-07-21 08:36:17,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:36:17,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-07-21 08:36:17,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:36:17,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2022-07-21 08:36:17,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2022-07-21 08:36:17,236 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 273 flow. Second operand 3 states and 223 transitions. [2022-07-21 08:36:17,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 271 flow [2022-07-21 08:36:17,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 227 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 08:36:17,241 INFO L242 Difference]: Finished difference. Result has 80 places, 67 transitions, 179 flow [2022-07-21 08:36:17,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2022-07-21 08:36:17,242 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -19 predicate places. [2022-07-21 08:36:17,242 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 179 flow [2022-07-21 08:36:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-07-21 08:36:17,243 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:17,243 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:36:17,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:36:17,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:36:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1387139045, now seen corresponding path program 1 times [2022-07-21 08:36:17,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:17,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463660545] [2022-07-21 08:36:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:17,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:17,257 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:36:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:36:17,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:36:17,278 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:36:17,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-21 08:36:17,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:36:17,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-21 08:36:17,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-21 08:36:17,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-21 08:36:17,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-21 08:36:17,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:36:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:36:17,279 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:36:17,282 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:36:17,282 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:36:17,299 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:36:17,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-07-21 08:36:17,312 INFO L129 PetriNetUnfolder]: 13/183 cut-off events. [2022-07-21 08:36:17,312 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:36:17,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 374 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-07-21 08:36:17,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 274 flow [2022-07-21 08:36:17,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 107 transitions, 274 flow [2022-07-21 08:36:17,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:36:17,317 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@640fd62d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411bc9e [2022-07-21 08:36:17,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 08:36:17,322 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-21 08:36:17,322 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:36:17,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:36:17,322 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] [2022-07-21 08:36:17,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:36:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:36:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 435226201, now seen corresponding path program 1 times [2022-07-21 08:36:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:36:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957353863] [2022-07-21 08:36:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:36:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:36:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:36:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:36:17,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:36:17,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957353863] [2022-07-21 08:36:17,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957353863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:36:17,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:36:17,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:36:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639565208] [2022-07-21 08:36:17,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:36:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:36:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:36:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:36:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:36:17,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 107 [2022-07-21 08:36:17,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2022-07-21 08:36:17,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:36:17,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 107 [2022-07-21 08:36:17,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand