./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.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/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:51:49,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:51:49,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:51:49,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:51:49,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:51:49,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:51:49,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:51:49,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:51:49,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:51:49,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:51:49,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:51:49,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:51:49,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:51:49,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:51:49,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:51:49,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:51:49,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:51:49,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:51:49,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:51:49,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:51:49,844 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:51:49,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:51:49,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:51:49,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:51:49,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:51:49,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:51:49,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:51:49,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:51:49,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:51:49,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:51:49,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:51:49,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:51:49,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:51:49,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:51:49,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:51:49,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:51:49,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:51:49,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:51:49,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:51:49,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:51:49,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:51:49,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:51:49,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:51:49,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:51:49,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:51:49,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:51:49,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:51:49,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:51:49,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:51:49,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:51:49,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:51:49,872 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:51:49,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:51:49,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:51:49,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:51:49,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:51:49,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:51:49,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:51:49,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:51:49,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:51:49,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:51:49,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:51:49,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:51:49,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:51:49,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2022-07-21 08:51:50,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:51:50,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:51:50,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:51:50,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:51:50,145 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:51:50,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-07-21 08:51:50,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4fdfd86/df54891986c44275991f762f89c14711/FLAGe6ab00e57 [2022-07-21 08:51:50,605 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:51:50,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-07-21 08:51:50,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4fdfd86/df54891986c44275991f762f89c14711/FLAGe6ab00e57 [2022-07-21 08:51:50,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac4fdfd86/df54891986c44275991f762f89c14711 [2022-07-21 08:51:50,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:51:50,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:51:50,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:51:50,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:51:50,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:51:50,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:50" (1/1) ... [2022-07-21 08:51:50,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7dfca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:50, skipping insertion in model container [2022-07-21 08:51:50,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:50" (1/1) ... [2022-07-21 08:51:50,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:51:50,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:51:51,196 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-07-21 08:51:51,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:51:51,261 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:51:51,298 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-07-21 08:51:51,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:51:51,337 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:51:51,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51 WrapperNode [2022-07-21 08:51:51,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:51:51,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:51:51,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:51:51,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:51:51,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,382 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-07-21 08:51:51,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:51:51,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:51:51,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:51:51,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:51:51,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:51:51,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:51:51,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:51:51,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:51:51,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (1/1) ... [2022-07-21 08:51:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:51:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:51,435 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 08:51:51,437 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 08:51:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:51:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:51:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:51:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:51:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:51:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:51:51,468 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:51:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:51:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:51:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:51:51,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:51:51,469 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 08:51:51,549 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:51:51,550 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:51:51,730 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:51:51,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:51:51,738 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 08:51:51,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:51 BoogieIcfgContainer [2022-07-21 08:51:51,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:51:51,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:51:51,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:51:51,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:51:51,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:51:50" (1/3) ... [2022-07-21 08:51:51,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562add69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:51, skipping insertion in model container [2022-07-21 08:51:51,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:51" (2/3) ... [2022-07-21 08:51:51,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562add69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:51, skipping insertion in model container [2022-07-21 08:51:51,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:51" (3/3) ... [2022-07-21 08:51:51,745 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2022-07-21 08:51:51,748 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:51:51,754 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:51:51,754 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:51:51,754 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:51:51,803 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:51:51,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 129 transitions, 266 flow [2022-07-21 08:51:51,878 INFO L129 PetriNetUnfolder]: 17/168 cut-off events. [2022-07-21 08:51:51,878 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:51,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 391 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-07-21 08:51:51,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 129 transitions, 266 flow [2022-07-21 08:51:51,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 124 transitions, 253 flow [2022-07-21 08:51:51,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:51,899 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:51,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:51,917 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2022-07-21 08:51:51,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:51,918 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:51,918 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:51,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash 456647562, now seen corresponding path program 1 times [2022-07-21 08:51:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004834698] [2022-07-21 08:51:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:52,147 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 08:51:52,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004834698] [2022-07-21 08:51:52,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004834698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:52,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:52,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:52,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782487029] [2022-07-21 08:51:52,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:52,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:52,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:52,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 129 [2022-07-21 08:51:52,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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 08:51:52,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:52,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 129 [2022-07-21 08:51:52,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:52,270 INFO L129 PetriNetUnfolder]: 0/116 cut-off events. [2022-07-21 08:51:52,271 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:52,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 116 events. 0/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 18/131 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:51:52,275 INFO L132 encePairwiseOnDemand]: 115/129 looper letters, 8 selfloop transitions, 2 changer transitions 16/114 dead transitions. [2022-07-21 08:51:52,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 253 flow [2022-07-21 08:51:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-07-21 08:51:52,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-07-21 08:51:52,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-07-21 08:51:52,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-07-21 08:51:52,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:52,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-07-21 08:51:52,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 08:51:52,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 08:51:52,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 08:51:52,314 INFO L186 Difference]: Start difference. First operand has 116 places, 124 transitions, 253 flow. Second operand 3 states and 353 transitions. [2022-07-21 08:51:52,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 253 flow [2022-07-21 08:51:52,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:52,324 INFO L242 Difference]: Finished difference. Result has 118 places, 96 transitions, 205 flow [2022-07-21 08:51:52,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=118, PETRI_TRANSITIONS=96} [2022-07-21 08:51:52,329 INFO L279 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2022-07-21 08:51:52,329 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 96 transitions, 205 flow [2022-07-21 08:51:52,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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 08:51:52,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:52,331 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:51:52,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1230713936, now seen corresponding path program 1 times [2022-07-21 08:51:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288518854] [2022-07-21 08:51:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:52,391 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:52,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:52,443 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:52,444 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:52,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:52,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:51:52,447 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:51:52,449 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:52,451 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:51:52,480 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:51:52,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 152 places, 166 transitions, 350 flow [2022-07-21 08:51:52,518 INFO L129 PetriNetUnfolder]: 31/269 cut-off events. [2022-07-21 08:51:52,518 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:51:52,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 269 events. 31/269 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 809 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-07-21 08:51:52,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 166 transitions, 350 flow [2022-07-21 08:51:52,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 166 transitions, 350 flow [2022-07-21 08:51:52,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:52,526 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:52,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:52,533 INFO L129 PetriNetUnfolder]: 4/93 cut-off events. [2022-07-21 08:51:52,538 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:52,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:52,539 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:52,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2060697079, now seen corresponding path program 1 times [2022-07-21 08:51:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085791265] [2022-07-21 08:51:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:52,584 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 08:51:52,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085791265] [2022-07-21 08:51:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085791265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:52,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:52,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:52,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363103576] [2022-07-21 08:51:52,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:52,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 166 [2022-07-21 08:51:52,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 166 transitions, 350 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:52,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 166 [2022-07-21 08:51:52,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:52,632 INFO L129 PetriNetUnfolder]: 3/238 cut-off events. [2022-07-21 08:51:52,632 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-21 08:51:52,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 238 events. 3/238 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 595 event pairs, 0 based on Foata normal form. 42/270 useless extension candidates. Maximal degree in co-relation 154. Up to 7 conditions per place. [2022-07-21 08:51:52,634 INFO L132 encePairwiseOnDemand]: 149/166 looper letters, 2 selfloop transitions, 0 changer transitions 22/148 dead transitions. [2022-07-21 08:51:52,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 322 flow [2022-07-21 08:51:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 309 transitions. [2022-07-21 08:51:52,640 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9307228915662651 [2022-07-21 08:51:52,640 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 309 transitions. [2022-07-21 08:51:52,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 309 transitions. [2022-07-21 08:51:52,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:52,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 309 transitions. [2022-07-21 08:51:52,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 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 08:51:52,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 08:51:52,646 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 08:51:52,646 INFO L186 Difference]: Start difference. First operand has 152 places, 166 transitions, 350 flow. Second operand 2 states and 309 transitions. [2022-07-21 08:51:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 322 flow [2022-07-21 08:51:52,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:52,652 INFO L242 Difference]: Finished difference. Result has 152 places, 126 transitions, 264 flow [2022-07-21 08:51:52,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=264, PETRI_PLACES=152, PETRI_TRANSITIONS=126} [2022-07-21 08:51:52,653 INFO L279 CegarLoopForPetriNet]: 152 programPoint places, 0 predicate places. [2022-07-21 08:51:52,653 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 126 transitions, 264 flow [2022-07-21 08:51:52,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,653 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:52,653 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:52,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:51:52,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:52,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1940867210, now seen corresponding path program 1 times [2022-07-21 08:51:52,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:52,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143770644] [2022-07-21 08:51:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:52,692 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 08:51:52,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143770644] [2022-07-21 08:51:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143770644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:52,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:52,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725875746] [2022-07-21 08:51:52,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:52,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 166 [2022-07-21 08:51:52,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:52,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 166 [2022-07-21 08:51:52,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:52,720 INFO L129 PetriNetUnfolder]: 0/152 cut-off events. [2022-07-21 08:51:52,727 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:51:52,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 152 events. 0/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 228 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-21 08:51:52,728 INFO L132 encePairwiseOnDemand]: 163/166 looper letters, 11 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2022-07-21 08:51:52,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 298 flow [2022-07-21 08:51:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2022-07-21 08:51:52,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8534136546184738 [2022-07-21 08:51:52,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2022-07-21 08:51:52,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2022-07-21 08:51:52,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:52,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2022-07-21 08:51:52,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 08:51:52,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 08:51:52,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 08:51:52,738 INFO L186 Difference]: Start difference. First operand has 152 places, 126 transitions, 264 flow. Second operand 3 states and 425 transitions. [2022-07-21 08:51:52,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 298 flow [2022-07-21 08:51:52,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 296 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:52,743 INFO L242 Difference]: Finished difference. Result has 135 places, 127 transitions, 274 flow [2022-07-21 08:51:52,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=135, PETRI_TRANSITIONS=127} [2022-07-21 08:51:52,745 INFO L279 CegarLoopForPetriNet]: 152 programPoint places, -17 predicate places. [2022-07-21 08:51:52,745 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 127 transitions, 274 flow [2022-07-21 08:51:52,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:52,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:52,746 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:52,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:51:52,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:52,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:52,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1237291022, now seen corresponding path program 1 times [2022-07-21 08:51:52,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:52,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745088131] [2022-07-21 08:51:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:52,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745088131] [2022-07-21 08:51:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745088131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776181513] [2022-07-21 08:51:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:52,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:52,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:52,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:51:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:52,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776181513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:53,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:53,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142997330] [2022-07-21 08:51:53,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:53,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 166 [2022-07-21 08:51:53,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 127 transitions, 274 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:53,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:53,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 166 [2022-07-21 08:51:53,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:53,101 INFO L129 PetriNetUnfolder]: 0/126 cut-off events. [2022-07-21 08:51:53,102 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:51:53,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 126 events. 0/126 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-21 08:51:53,102 INFO L132 encePairwiseOnDemand]: 161/166 looper letters, 9 selfloop transitions, 7 changer transitions 0/120 dead transitions. [2022-07-21 08:51:53,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 290 flow [2022-07-21 08:51:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1242 transitions. [2022-07-21 08:51:53,105 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8313253012048193 [2022-07-21 08:51:53,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1242 transitions. [2022-07-21 08:51:53,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1242 transitions. [2022-07-21 08:51:53,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:53,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1242 transitions. [2022-07-21 08:51:53,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 138.0) internal successors, (1242), 9 states have internal predecessors, (1242), 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 08:51:53,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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 08:51:53,111 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 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 08:51:53,111 INFO L186 Difference]: Start difference. First operand has 135 places, 127 transitions, 274 flow. Second operand 9 states and 1242 transitions. [2022-07-21 08:51:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 290 flow [2022-07-21 08:51:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 120 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:53,113 INFO L242 Difference]: Finished difference. Result has 129 places, 116 transitions, 262 flow [2022-07-21 08:51:53,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=262, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2022-07-21 08:51:53,114 INFO L279 CegarLoopForPetriNet]: 152 programPoint places, -23 predicate places. [2022-07-21 08:51:53,114 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 262 flow [2022-07-21 08:51:53,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:53,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:53,116 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:53,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:51:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:53,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 882605759, now seen corresponding path program 1 times [2022-07-21 08:51:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:53,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208504916] [2022-07-21 08:51:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:53,371 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:53,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:53,414 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:53,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:53,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:51:53,414 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:53,415 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:53,415 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:51:53,449 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:51:53,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 184 places, 203 transitions, 436 flow [2022-07-21 08:51:53,493 INFO L129 PetriNetUnfolder]: 50/403 cut-off events. [2022-07-21 08:51:53,493 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:51:53,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 403 events. 50/403 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1394 event pairs, 1 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2022-07-21 08:51:53,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 203 transitions, 436 flow [2022-07-21 08:51:53,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 203 transitions, 436 flow [2022-07-21 08:51:53,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:53,505 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:53,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:53,512 INFO L129 PetriNetUnfolder]: 4/98 cut-off events. [2022-07-21 08:51:53,512 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:53,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:53,512 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:53,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1237639414, now seen corresponding path program 1 times [2022-07-21 08:51:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724200956] [2022-07-21 08:51:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:53,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:53,562 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 08:51:53,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:53,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724200956] [2022-07-21 08:51:53,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724200956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:53,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:53,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:53,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554032465] [2022-07-21 08:51:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:53,567 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 203 [2022-07-21 08:51:53,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 203 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:53,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:53,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 203 [2022-07-21 08:51:53,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:53,630 INFO L129 PetriNetUnfolder]: 7/337 cut-off events. [2022-07-21 08:51:53,631 INFO L130 PetriNetUnfolder]: For 78/177 co-relation queries the response was YES. [2022-07-21 08:51:53,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 337 events. 7/337 cut-off events. For 78/177 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1019 event pairs, 1 based on Foata normal form. 164/487 useless extension candidates. Maximal degree in co-relation 246. Up to 30 conditions per place. [2022-07-21 08:51:53,633 INFO L132 encePairwiseOnDemand]: 177/203 looper letters, 12 selfloop transitions, 2 changer transitions 23/183 dead transitions. [2022-07-21 08:51:53,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 183 transitions, 430 flow [2022-07-21 08:51:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2022-07-21 08:51:53,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2022-07-21 08:51:53,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2022-07-21 08:51:53,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2022-07-21 08:51:53,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:53,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2022-07-21 08:51:53,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:53,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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 08:51:53,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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 08:51:53,655 INFO L186 Difference]: Start difference. First operand has 184 places, 203 transitions, 436 flow. Second operand 3 states and 546 transitions. [2022-07-21 08:51:53,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 183 transitions, 430 flow [2022-07-21 08:51:53,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 183 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:53,658 INFO L242 Difference]: Finished difference. Result has 186 places, 157 transitions, 345 flow [2022-07-21 08:51:53,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=186, PETRI_TRANSITIONS=157} [2022-07-21 08:51:53,660 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, 2 predicate places. [2022-07-21 08:51:53,660 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 157 transitions, 345 flow [2022-07-21 08:51:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:53,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:53,662 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:53,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:51:53,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1169265333, now seen corresponding path program 1 times [2022-07-21 08:51:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:53,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501596527] [2022-07-21 08:51:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:53,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501596527] [2022-07-21 08:51:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501596527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604219640] [2022-07-21 08:51:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:53,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:53,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:53,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:53,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:51:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:53,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604219640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:53,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:53,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146409071] [2022-07-21 08:51:53,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:53,893 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 203 [2022-07-21 08:51:53,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 157 transitions, 345 flow. Second operand has 10 states, 10 states have (on average 167.3) internal successors, (1673), 10 states have internal predecessors, (1673), 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 08:51:53,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:53,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 203 [2022-07-21 08:51:53,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:53,966 INFO L129 PetriNetUnfolder]: 0/178 cut-off events. [2022-07-21 08:51:53,966 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-21 08:51:53,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 178 events. 0/178 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 275 event pairs, 0 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:51:53,967 INFO L132 encePairwiseOnDemand]: 197/203 looper letters, 13 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-07-21 08:51:53,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 167 transitions, 411 flow [2022-07-21 08:51:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1509 transitions. [2022-07-21 08:51:53,969 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.825944170771757 [2022-07-21 08:51:53,969 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1509 transitions. [2022-07-21 08:51:53,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1509 transitions. [2022-07-21 08:51:53,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:53,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1509 transitions. [2022-07-21 08:51:53,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.66666666666666) internal successors, (1509), 9 states have internal predecessors, (1509), 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 08:51:53,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 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 08:51:53,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 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 08:51:53,975 INFO L186 Difference]: Start difference. First operand has 186 places, 157 transitions, 345 flow. Second operand 9 states and 1509 transitions. [2022-07-21 08:51:53,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 167 transitions, 411 flow [2022-07-21 08:51:53,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 167 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:53,978 INFO L242 Difference]: Finished difference. Result has 176 places, 163 transitions, 387 flow [2022-07-21 08:51:53,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=387, PETRI_PLACES=176, PETRI_TRANSITIONS=163} [2022-07-21 08:51:53,979 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, -8 predicate places. [2022-07-21 08:51:53,979 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 163 transitions, 387 flow [2022-07-21 08:51:53,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 167.3) internal successors, (1673), 10 states have internal predecessors, (1673), 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 08:51:53,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:53,980 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:54,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-21 08:51:54,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash -453477867, now seen corresponding path program 1 times [2022-07-21 08:51:54,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:54,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873700170] [2022-07-21 08:51:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:54,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:54,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:54,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:54,227 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:54,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:54,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:54,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:51:54,227 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:51:54,228 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:54,228 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:51:54,257 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:51:54,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 240 transitions, 524 flow [2022-07-21 08:51:54,308 INFO L129 PetriNetUnfolder]: 81/605 cut-off events. [2022-07-21 08:51:54,308 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:51:54,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 605 events. 81/605 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2382 event pairs, 6 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2022-07-21 08:51:54,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 240 transitions, 524 flow [2022-07-21 08:51:54,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 240 transitions, 524 flow [2022-07-21 08:51:54,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:54,322 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:54,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:54,328 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-21 08:51:54,329 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:54,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:54,329 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:54,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -195534711, now seen corresponding path program 1 times [2022-07-21 08:51:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:54,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997178719] [2022-07-21 08:51:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:54,348 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 08:51:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997178719] [2022-07-21 08:51:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997178719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:54,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:54,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:54,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939101346] [2022-07-21 08:51:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:54,351 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 240 [2022-07-21 08:51:54,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 240 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 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 08:51:54,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:54,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 240 [2022-07-21 08:51:54,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:54,426 INFO L129 PetriNetUnfolder]: 21/540 cut-off events. [2022-07-21 08:51:54,426 INFO L130 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2022-07-21 08:51:54,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 540 events. 21/540 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2154 event pairs, 6 based on Foata normal form. 248/762 useless extension candidates. Maximal degree in co-relation 392. Up to 37 conditions per place. [2022-07-21 08:51:54,430 INFO L132 encePairwiseOnDemand]: 211/240 looper letters, 4 selfloop transitions, 0 changer transitions 24/210 dead transitions. [2022-07-21 08:51:54,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 210 transitions, 480 flow [2022-07-21 08:51:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 441 transitions. [2022-07-21 08:51:54,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.91875 [2022-07-21 08:51:54,432 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 441 transitions. [2022-07-21 08:51:54,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 441 transitions. [2022-07-21 08:51:54,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:54,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 441 transitions. [2022-07-21 08:51:54,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 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 08:51:54,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 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 08:51:54,434 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 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 08:51:54,435 INFO L186 Difference]: Start difference. First operand has 216 places, 240 transitions, 524 flow. Second operand 2 states and 441 transitions. [2022-07-21 08:51:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 210 transitions, 480 flow [2022-07-21 08:51:54,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 210 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:54,438 INFO L242 Difference]: Finished difference. Result has 216 places, 186 transitions, 404 flow [2022-07-21 08:51:54,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=404, PETRI_PLACES=216, PETRI_TRANSITIONS=186} [2022-07-21 08:51:54,439 INFO L279 CegarLoopForPetriNet]: 216 programPoint places, 0 predicate places. [2022-07-21 08:51:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 186 transitions, 404 flow [2022-07-21 08:51:54,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 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 08:51:54,440 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:54,440 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:51:54,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -488937718, now seen corresponding path program 1 times [2022-07-21 08:51:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487071506] [2022-07-21 08:51:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:54,462 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 08:51:54,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:54,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487071506] [2022-07-21 08:51:54,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487071506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:54,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:54,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153147731] [2022-07-21 08:51:54,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:54,464 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 240 [2022-07-21 08:51:54,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 186 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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 08:51:54,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:54,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 240 [2022-07-21 08:51:54,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:54,505 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-21 08:51:54,506 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:51:54,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 256 events. 0/256 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 640 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-21 08:51:54,507 INFO L132 encePairwiseOnDemand]: 237/240 looper letters, 13 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2022-07-21 08:51:54,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 190 transitions, 442 flow [2022-07-21 08:51:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2022-07-21 08:51:54,522 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8347222222222223 [2022-07-21 08:51:54,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2022-07-21 08:51:54,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2022-07-21 08:51:54,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:54,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2022-07-21 08:51:54,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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 08:51:54,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 08:51:54,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 08:51:54,526 INFO L186 Difference]: Start difference. First operand has 216 places, 186 transitions, 404 flow. Second operand 3 states and 601 transitions. [2022-07-21 08:51:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 190 transitions, 442 flow [2022-07-21 08:51:54,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 190 transitions, 430 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:54,530 INFO L242 Difference]: Finished difference. Result has 199 places, 187 transitions, 404 flow [2022-07-21 08:51:54,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=199, PETRI_TRANSITIONS=187} [2022-07-21 08:51:54,532 INFO L279 CegarLoopForPetriNet]: 216 programPoint places, -17 predicate places. [2022-07-21 08:51:54,532 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 187 transitions, 404 flow [2022-07-21 08:51:54,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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 08:51:54,533 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:54,533 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:54,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:51:54,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1107873304, now seen corresponding path program 1 times [2022-07-21 08:51:54,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066140510] [2022-07-21 08:51:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066140510] [2022-07-21 08:51:54,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066140510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358074822] [2022-07-21 08:51:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:54,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:54,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:51:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358074822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:54,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:54,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:54,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297030692] [2022-07-21 08:51:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:54,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:54,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:54,718 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 240 [2022-07-21 08:51:54,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 187 transitions, 404 flow. Second operand has 10 states, 10 states have (on average 196.3) internal successors, (1963), 10 states have internal predecessors, (1963), 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 08:51:54,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:54,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 240 [2022-07-21 08:51:54,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:54,785 INFO L129 PetriNetUnfolder]: 0/230 cut-off events. [2022-07-21 08:51:54,786 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:51:54,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 230 events. 0/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 482 event pairs, 0 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:51:54,786 INFO L132 encePairwiseOnDemand]: 234/240 looper letters, 14 selfloop transitions, 9 changer transitions 0/197 dead transitions. [2022-07-21 08:51:54,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 197 transitions, 472 flow [2022-07-21 08:51:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1771 transitions. [2022-07-21 08:51:54,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8199074074074074 [2022-07-21 08:51:54,790 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1771 transitions. [2022-07-21 08:51:54,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1771 transitions. [2022-07-21 08:51:54,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:54,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1771 transitions. [2022-07-21 08:51:54,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.77777777777777) internal successors, (1771), 9 states have internal predecessors, (1771), 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 08:51:54,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:54,796 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:54,796 INFO L186 Difference]: Start difference. First operand has 199 places, 187 transitions, 404 flow. Second operand 9 states and 1771 transitions. [2022-07-21 08:51:54,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 197 transitions, 472 flow [2022-07-21 08:51:54,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 197 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:54,800 INFO L242 Difference]: Finished difference. Result has 209 places, 193 transitions, 452 flow [2022-07-21 08:51:54,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=209, PETRI_TRANSITIONS=193} [2022-07-21 08:51:54,800 INFO L279 CegarLoopForPetriNet]: 216 programPoint places, -7 predicate places. [2022-07-21 08:51:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 193 transitions, 452 flow [2022-07-21 08:51:54,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 196.3) internal successors, (1963), 10 states have internal predecessors, (1963), 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 08:51:54,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:54,802 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:54,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:55,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2077833143, now seen corresponding path program 1 times [2022-07-21 08:51:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:55,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234469187] [2022-07-21 08:51:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234469187] [2022-07-21 08:51:55,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234469187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620210550] [2022-07-21 08:51:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:55,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:55,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:51:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620210550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:55,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:55,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410452558] [2022-07-21 08:51:55,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:55,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 240 [2022-07-21 08:51:55,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 193 transitions, 452 flow. Second operand has 18 states, 18 states have (on average 196.61111111111111) internal successors, (3539), 18 states have internal predecessors, (3539), 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 08:51:55,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:55,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 240 [2022-07-21 08:51:55,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:55,401 INFO L129 PetriNetUnfolder]: 0/204 cut-off events. [2022-07-21 08:51:55,401 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-21 08:51:55,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 204 events. 0/204 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 329 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 08:51:55,402 INFO L132 encePairwiseOnDemand]: 235/240 looper letters, 15 selfloop transitions, 13 changer transitions 0/190 dead transitions. [2022-07-21 08:51:55,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 190 transitions, 514 flow [2022-07-21 08:51:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 08:51:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 08:51:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2940 transitions. [2022-07-21 08:51:55,407 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8166666666666667 [2022-07-21 08:51:55,407 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2940 transitions. [2022-07-21 08:51:55,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2940 transitions. [2022-07-21 08:51:55,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:55,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2940 transitions. [2022-07-21 08:51:55,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 196.0) internal successors, (2940), 15 states have internal predecessors, (2940), 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 08:51:55,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 240.0) internal successors, (3840), 16 states have internal predecessors, (3840), 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 08:51:55,417 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 240.0) internal successors, (3840), 16 states have internal predecessors, (3840), 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 08:51:55,417 INFO L186 Difference]: Start difference. First operand has 209 places, 193 transitions, 452 flow. Second operand 15 states and 2940 transitions. [2022-07-21 08:51:55,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 190 transitions, 514 flow [2022-07-21 08:51:55,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 190 transitions, 497 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:55,421 INFO L242 Difference]: Finished difference. Result has 206 places, 183 transitions, 446 flow [2022-07-21 08:51:55,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=446, PETRI_PLACES=206, PETRI_TRANSITIONS=183} [2022-07-21 08:51:55,423 INFO L279 CegarLoopForPetriNet]: 216 programPoint places, -10 predicate places. [2022-07-21 08:51:55,423 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 183 transitions, 446 flow [2022-07-21 08:51:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 196.61111111111111) internal successors, (3539), 18 states have internal predecessors, (3539), 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 08:51:55,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:55,425 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:55,642 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash -680270030, now seen corresponding path program 1 times [2022-07-21 08:51:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:55,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636826644] [2022-07-21 08:51:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:55,665 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:55,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:55,691 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:55,692 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:55,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:55,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:51:55,692 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:55,693 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:55,693 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:51:55,714 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:51:55,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 248 places, 277 transitions, 614 flow [2022-07-21 08:51:55,819 INFO L129 PetriNetUnfolder]: 140/947 cut-off events. [2022-07-21 08:51:55,819 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:51:55,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 947 events. 140/947 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4324 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 650. Up to 80 conditions per place. [2022-07-21 08:51:55,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 277 transitions, 614 flow [2022-07-21 08:51:55,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 277 transitions, 614 flow [2022-07-21 08:51:55,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:55,844 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:55,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:55,848 INFO L129 PetriNetUnfolder]: 4/96 cut-off events. [2022-07-21 08:51:55,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:55,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:55,848 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:55,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 185408009, now seen corresponding path program 1 times [2022-07-21 08:51:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:55,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247368143] [2022-07-21 08:51:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:55,860 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 08:51:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247368143] [2022-07-21 08:51:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247368143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:55,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:55,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660999508] [2022-07-21 08:51:55,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:55,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:55,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 277 [2022-07-21 08:51:55,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 277 transitions, 614 flow. Second operand has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 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 08:51:55,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:55,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 277 [2022-07-21 08:51:55,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:55,986 INFO L129 PetriNetUnfolder]: 54/855 cut-off events. [2022-07-21 08:51:55,986 INFO L130 PetriNetUnfolder]: For 286/302 co-relation queries the response was YES. [2022-07-21 08:51:55,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 855 events. 54/855 cut-off events. For 286/302 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4031 event pairs, 23 based on Foata normal form. 574/1385 useless extension candidates. Maximal degree in co-relation 621. Up to 86 conditions per place. [2022-07-21 08:51:55,995 INFO L132 encePairwiseOnDemand]: 242/277 looper letters, 5 selfloop transitions, 0 changer transitions 25/241 dead transitions. [2022-07-21 08:51:55,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 241 transitions, 562 flow [2022-07-21 08:51:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 507 transitions. [2022-07-21 08:51:55,997 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9151624548736462 [2022-07-21 08:51:55,997 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 507 transitions. [2022-07-21 08:51:55,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 507 transitions. [2022-07-21 08:51:55,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:55,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 507 transitions. [2022-07-21 08:51:55,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 253.5) internal successors, (507), 2 states have internal predecessors, (507), 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 08:51:55,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:51:55,999 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 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 08:51:55,999 INFO L186 Difference]: Start difference. First operand has 248 places, 277 transitions, 614 flow. Second operand 2 states and 507 transitions. [2022-07-21 08:51:56,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 241 transitions, 562 flow [2022-07-21 08:51:56,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 241 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:56,003 INFO L242 Difference]: Finished difference. Result has 248 places, 216 transitions, 477 flow [2022-07-21 08:51:56,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=477, PETRI_PLACES=248, PETRI_TRANSITIONS=216} [2022-07-21 08:51:56,004 INFO L279 CegarLoopForPetriNet]: 248 programPoint places, 0 predicate places. [2022-07-21 08:51:56,004 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 216 transitions, 477 flow [2022-07-21 08:51:56,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 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 08:51:56,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:56,005 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 08:51:56,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash -107994998, now seen corresponding path program 1 times [2022-07-21 08:51:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147340691] [2022-07-21 08:51:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,031 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 08:51:56,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147340691] [2022-07-21 08:51:56,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147340691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:56,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:56,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:56,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388794412] [2022-07-21 08:51:56,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:56,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:56,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 277 [2022-07-21 08:51:56,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 216 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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 08:51:56,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:56,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 277 [2022-07-21 08:51:56,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:56,090 INFO L129 PetriNetUnfolder]: 0/308 cut-off events. [2022-07-21 08:51:56,091 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:56,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 308 events. 0/308 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 849 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-21 08:51:56,092 INFO L132 encePairwiseOnDemand]: 274/277 looper letters, 14 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-07-21 08:51:56,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 220 transitions, 517 flow [2022-07-21 08:51:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2022-07-21 08:51:56,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291215403128761 [2022-07-21 08:51:56,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2022-07-21 08:51:56,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2022-07-21 08:51:56,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:56,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2022-07-21 08:51:56,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 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 08:51:56,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:51:56,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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 08:51:56,097 INFO L186 Difference]: Start difference. First operand has 248 places, 216 transitions, 477 flow. Second operand 3 states and 689 transitions. [2022-07-21 08:51:56,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 220 transitions, 517 flow [2022-07-21 08:51:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 220 transitions, 497 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:56,100 INFO L242 Difference]: Finished difference. Result has 231 places, 217 transitions, 469 flow [2022-07-21 08:51:56,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=469, PETRI_PLACES=231, PETRI_TRANSITIONS=217} [2022-07-21 08:51:56,101 INFO L279 CegarLoopForPetriNet]: 248 programPoint places, -17 predicate places. [2022-07-21 08:51:56,101 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 217 transitions, 469 flow [2022-07-21 08:51:56,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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 08:51:56,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:56,102 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:51:56,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1421467109, now seen corresponding path program 1 times [2022-07-21 08:51:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:56,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576594212] [2022-07-21 08:51:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576594212] [2022-07-21 08:51:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576594212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116029167] [2022-07-21 08:51:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:56,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:56,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:51:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116029167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:56,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873591654] [2022-07-21 08:51:56,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:56,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-07-21 08:51:56,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 217 transitions, 469 flow. Second operand has 10 states, 10 states have (on average 225.3) internal successors, (2253), 10 states have internal predecessors, (2253), 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 08:51:56,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:56,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-07-21 08:51:56,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:56,400 INFO L129 PetriNetUnfolder]: 0/282 cut-off events. [2022-07-21 08:51:56,415 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:51:56,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 282 events. 0/282 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 687 event pairs, 0 based on Foata normal form. 2/284 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:51:56,416 INFO L132 encePairwiseOnDemand]: 271/277 looper letters, 15 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-07-21 08:51:56,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 227 transitions, 539 flow [2022-07-21 08:51:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2033 transitions. [2022-07-21 08:51:56,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154833533894906 [2022-07-21 08:51:56,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2033 transitions. [2022-07-21 08:51:56,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2033 transitions. [2022-07-21 08:51:56,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:56,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2033 transitions. [2022-07-21 08:51:56,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.88888888888889) internal successors, (2033), 9 states have internal predecessors, (2033), 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 08:51:56,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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 08:51:56,442 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 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 08:51:56,442 INFO L186 Difference]: Start difference. First operand has 231 places, 217 transitions, 469 flow. Second operand 9 states and 2033 transitions. [2022-07-21 08:51:56,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 227 transitions, 539 flow [2022-07-21 08:51:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 227 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:56,446 INFO L242 Difference]: Finished difference. Result has 241 places, 223 transitions, 517 flow [2022-07-21 08:51:56,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=517, PETRI_PLACES=241, PETRI_TRANSITIONS=223} [2022-07-21 08:51:56,446 INFO L279 CegarLoopForPetriNet]: 248 programPoint places, -7 predicate places. [2022-07-21 08:51:56,446 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 223 transitions, 517 flow [2022-07-21 08:51:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 225.3) internal successors, (2253), 10 states have internal predecessors, (2253), 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 08:51:56,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:56,448 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:56,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 08:51:56,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1498719872, now seen corresponding path program 1 times [2022-07-21 08:51:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:56,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155820403] [2022-07-21 08:51:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155820403] [2022-07-21 08:51:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155820403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219639041] [2022-07-21 08:51:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:56,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:56,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:51:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:56,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219639041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:56,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:56,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499267741] [2022-07-21 08:51:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:56,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:56,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 277 [2022-07-21 08:51:56,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 223 transitions, 517 flow. Second operand has 18 states, 18 states have (on average 225.61111111111111) internal successors, (4061), 18 states have internal predecessors, (4061), 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 08:51:56,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:56,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 277 [2022-07-21 08:51:56,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:57,089 INFO L129 PetriNetUnfolder]: 0/243 cut-off events. [2022-07-21 08:51:57,089 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-21 08:51:57,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 243 events. 0/243 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 445 event pairs, 0 based on Foata normal form. 3/246 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-21 08:51:57,090 INFO L132 encePairwiseOnDemand]: 272/277 looper letters, 18 selfloop transitions, 16 changer transitions 0/225 dead transitions. [2022-07-21 08:51:57,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 225 transitions, 615 flow [2022-07-21 08:51:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 08:51:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 08:51:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4051 transitions. [2022-07-21 08:51:57,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8124749298034497 [2022-07-21 08:51:57,096 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4051 transitions. [2022-07-21 08:51:57,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4051 transitions. [2022-07-21 08:51:57,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:57,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4051 transitions. [2022-07-21 08:51:57,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 225.05555555555554) internal successors, (4051), 18 states have internal predecessors, (4051), 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 08:51:57,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 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 08:51:57,109 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 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 08:51:57,109 INFO L186 Difference]: Start difference. First operand has 241 places, 223 transitions, 517 flow. Second operand 18 states and 4051 transitions. [2022-07-21 08:51:57,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 225 transitions, 615 flow [2022-07-21 08:51:57,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 225 transitions, 594 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:57,112 INFO L242 Difference]: Finished difference. Result has 241 places, 216 transitions, 530 flow [2022-07-21 08:51:57,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=530, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-07-21 08:51:57,113 INFO L279 CegarLoopForPetriNet]: 248 programPoint places, -7 predicate places. [2022-07-21 08:51:57,113 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 530 flow [2022-07-21 08:51:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 225.61111111111111) internal successors, (4061), 18 states have internal predecessors, (4061), 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 08:51:57,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:57,115 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:57,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 08:51:57,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1389140234, now seen corresponding path program 1 times [2022-07-21 08:51:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:57,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613407872] [2022-07-21 08:51:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:57,354 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:57,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:57,369 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:57,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:57,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:57,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:51:57,370 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:57,370 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:57,370 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:51:57,390 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 08:51:57,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 280 places, 314 transitions, 706 flow [2022-07-21 08:51:57,601 INFO L129 PetriNetUnfolder]: 263/1577 cut-off events. [2022-07-21 08:51:57,601 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-21 08:51:57,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 1577 events. 263/1577 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8781 event pairs, 72 based on Foata normal form. 0/1371 useless extension candidates. Maximal degree in co-relation 1046. Up to 192 conditions per place. [2022-07-21 08:51:57,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 314 transitions, 706 flow [2022-07-21 08:51:57,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 314 transitions, 706 flow [2022-07-21 08:51:57,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:57,635 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:57,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:57,638 INFO L129 PetriNetUnfolder]: 3/92 cut-off events. [2022-07-21 08:51:57,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:57,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:57,639 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:57,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 198591753, now seen corresponding path program 1 times [2022-07-21 08:51:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849784883] [2022-07-21 08:51:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:57,653 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 08:51:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:57,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849784883] [2022-07-21 08:51:57,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849784883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:57,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:57,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857155314] [2022-07-21 08:51:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:57,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:57,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 314 [2022-07-21 08:51:57,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 314 transitions, 706 flow. Second operand has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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 08:51:57,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:57,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 314 [2022-07-21 08:51:57,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:57,937 INFO L129 PetriNetUnfolder]: 135/1442 cut-off events. [2022-07-21 08:51:57,937 INFO L130 PetriNetUnfolder]: For 650/674 co-relation queries the response was YES. [2022-07-21 08:51:57,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 1442 events. 135/1442 cut-off events. For 650/674 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8441 event pairs, 72 based on Foata normal form. 1306/2670 useless extension candidates. Maximal degree in co-relation 1039. Up to 199 conditions per place. [2022-07-21 08:51:57,945 INFO L132 encePairwiseOnDemand]: 273/314 looper letters, 6 selfloop transitions, 0 changer transitions 26/272 dead transitions. [2022-07-21 08:51:57,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 272 transitions, 646 flow [2022-07-21 08:51:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:51:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:51:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 573 transitions. [2022-07-21 08:51:57,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9124203821656051 [2022-07-21 08:51:57,946 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 573 transitions. [2022-07-21 08:51:57,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 573 transitions. [2022-07-21 08:51:57,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:57,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 573 transitions. [2022-07-21 08:51:57,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 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 08:51:57,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 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 08:51:57,949 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 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 08:51:57,949 INFO L186 Difference]: Start difference. First operand has 280 places, 314 transitions, 706 flow. Second operand 2 states and 573 transitions. [2022-07-21 08:51:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 272 transitions, 646 flow [2022-07-21 08:51:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 272 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:57,954 INFO L242 Difference]: Finished difference. Result has 280 places, 246 transitions, 552 flow [2022-07-21 08:51:57,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=552, PETRI_PLACES=280, PETRI_TRANSITIONS=246} [2022-07-21 08:51:57,956 INFO L279 CegarLoopForPetriNet]: 280 programPoint places, 0 predicate places. [2022-07-21 08:51:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 246 transitions, 552 flow [2022-07-21 08:51:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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 08:51:57,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:57,956 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 08:51:57,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -94811254, now seen corresponding path program 1 times [2022-07-21 08:51:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:57,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755519404] [2022-07-21 08:51:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:57,973 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 08:51:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755519404] [2022-07-21 08:51:57,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755519404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:57,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:57,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:51:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222863553] [2022-07-21 08:51:57,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:51:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:51:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:51:57,975 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 314 [2022-07-21 08:51:57,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 246 transitions, 552 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 08:51:57,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:57,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 314 [2022-07-21 08:51:57,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:58,028 INFO L129 PetriNetUnfolder]: 0/360 cut-off events. [2022-07-21 08:51:58,028 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:51:58,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 360 events. 0/360 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1056 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-21 08:51:58,029 INFO L132 encePairwiseOnDemand]: 311/314 looper letters, 15 selfloop transitions, 2 changer transitions 0/250 dead transitions. [2022-07-21 08:51:58,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 250 transitions, 594 flow [2022-07-21 08:51:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:51:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:51:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2022-07-21 08:51:58,031 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8248407643312102 [2022-07-21 08:51:58,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2022-07-21 08:51:58,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2022-07-21 08:51:58,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:58,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2022-07-21 08:51:58,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 08:51:58,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 08:51:58,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 08:51:58,034 INFO L186 Difference]: Start difference. First operand has 280 places, 246 transitions, 552 flow. Second operand 3 states and 777 transitions. [2022-07-21 08:51:58,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 250 transitions, 594 flow [2022-07-21 08:51:58,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 250 transitions, 564 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:58,038 INFO L242 Difference]: Finished difference. Result has 263 places, 247 transitions, 534 flow [2022-07-21 08:51:58,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=534, PETRI_PLACES=263, PETRI_TRANSITIONS=247} [2022-07-21 08:51:58,038 INFO L279 CegarLoopForPetriNet]: 280 programPoint places, -17 predicate places. [2022-07-21 08:51:58,039 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 247 transitions, 534 flow [2022-07-21 08:51:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 08:51:58,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:58,039 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:58,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:51:58,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2123788610, now seen corresponding path program 1 times [2022-07-21 08:51:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:58,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255281314] [2022-07-21 08:51:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255281314] [2022-07-21 08:51:58,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255281314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624163279] [2022-07-21 08:51:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:58,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:58,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:51:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624163279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:58,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:58,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163720563] [2022-07-21 08:51:58,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:58,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:58,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:58,246 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 314 [2022-07-21 08:51:58,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 247 transitions, 534 flow. Second operand has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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 08:51:58,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:58,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 314 [2022-07-21 08:51:58,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:58,347 INFO L129 PetriNetUnfolder]: 0/334 cut-off events. [2022-07-21 08:51:58,348 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 08:51:58,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 334 events. 0/334 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 900 event pairs, 0 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:51:58,348 INFO L132 encePairwiseOnDemand]: 308/314 looper letters, 16 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2022-07-21 08:51:58,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 257 transitions, 606 flow [2022-07-21 08:51:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:51:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:51:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2295 transitions. [2022-07-21 08:51:58,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8121019108280255 [2022-07-21 08:51:58,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2295 transitions. [2022-07-21 08:51:58,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2295 transitions. [2022-07-21 08:51:58,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:58,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2295 transitions. [2022-07-21 08:51:58,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 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 08:51:58,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 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 08:51:58,359 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 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 08:51:58,359 INFO L186 Difference]: Start difference. First operand has 263 places, 247 transitions, 534 flow. Second operand 9 states and 2295 transitions. [2022-07-21 08:51:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 257 transitions, 606 flow [2022-07-21 08:51:58,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 257 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:51:58,363 INFO L242 Difference]: Finished difference. Result has 273 places, 253 transitions, 582 flow [2022-07-21 08:51:58,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=582, PETRI_PLACES=273, PETRI_TRANSITIONS=253} [2022-07-21 08:51:58,363 INFO L279 CegarLoopForPetriNet]: 280 programPoint places, -7 predicate places. [2022-07-21 08:51:58,363 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 253 transitions, 582 flow [2022-07-21 08:51:58,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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 08:51:58,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:58,364 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:58,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:58,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:58,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1220389417, now seen corresponding path program 1 times [2022-07-21 08:51:58,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:58,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62972646] [2022-07-21 08:51:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62972646] [2022-07-21 08:51:58,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62972646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239865100] [2022-07-21 08:51:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:58,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:58,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:58,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:51:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:51:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:58,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239865100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:58,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:58,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:51:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764534073] [2022-07-21 08:51:58,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:51:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:51:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:51:58,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 314 [2022-07-21 08:51:58,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 253 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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 08:51:58,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:58,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 314 [2022-07-21 08:51:58,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:59,048 INFO L129 PetriNetUnfolder]: 0/282 cut-off events. [2022-07-21 08:51:59,049 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:51:59,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 282 events. 0/282 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 561 event pairs, 0 based on Foata normal form. 4/286 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-21 08:51:59,050 INFO L132 encePairwiseOnDemand]: 309/314 looper letters, 21 selfloop transitions, 19 changer transitions 0/260 dead transitions. [2022-07-21 08:51:59,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 260 transitions, 716 flow [2022-07-21 08:51:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:51:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:51:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5336 transitions. [2022-07-21 08:51:59,054 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8092205034880194 [2022-07-21 08:51:59,054 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5336 transitions. [2022-07-21 08:51:59,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5336 transitions. [2022-07-21 08:51:59,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:59,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5336 transitions. [2022-07-21 08:51:59,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 254.0952380952381) internal successors, (5336), 21 states have internal predecessors, (5336), 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 08:51:59,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 314.0) internal successors, (6908), 22 states have internal predecessors, (6908), 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 08:51:59,067 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 314.0) internal successors, (6908), 22 states have internal predecessors, (6908), 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 08:51:59,068 INFO L186 Difference]: Start difference. First operand has 273 places, 253 transitions, 582 flow. Second operand 21 states and 5336 transitions. [2022-07-21 08:51:59,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 260 transitions, 716 flow [2022-07-21 08:51:59,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 260 transitions, 691 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-21 08:51:59,072 INFO L242 Difference]: Finished difference. Result has 276 places, 249 transitions, 614 flow [2022-07-21 08:51:59,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=614, PETRI_PLACES=276, PETRI_TRANSITIONS=249} [2022-07-21 08:51:59,072 INFO L279 CegarLoopForPetriNet]: 280 programPoint places, -4 predicate places. [2022-07-21 08:51:59,072 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 249 transitions, 614 flow [2022-07-21 08:51:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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 08:51:59,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:59,074 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:59,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:51:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 08:51:59,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 781482561, now seen corresponding path program 1 times [2022-07-21 08:51:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011483189] [2022-07-21 08:51:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:59,321 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:59,351 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:59,352 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:59,352 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:51:59,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:51:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 08:51:59,352 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:51:59,353 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:59,353 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 08:51:59,387 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-21 08:51:59,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 312 places, 351 transitions, 800 flow [2022-07-21 08:51:59,813 INFO L129 PetriNetUnfolder]: 530/2799 cut-off events. [2022-07-21 08:51:59,813 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-21 08:51:59,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 2799 events. 530/2799 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18702 event pairs, 201 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 1795. Up to 448 conditions per place. [2022-07-21 08:51:59,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 351 transitions, 800 flow [2022-07-21 08:51:59,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 351 transitions, 800 flow [2022-07-21 08:51:59,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:59,891 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:51:59,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:51:59,894 INFO L129 PetriNetUnfolder]: 3/91 cut-off events. [2022-07-21 08:51:59,895 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:51:59,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:59,895 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:59,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:51:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash -155983479, now seen corresponding path program 1 times [2022-07-21 08:51:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966986413] [2022-07-21 08:51:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:59,907 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 08:51:59,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966986413] [2022-07-21 08:51:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966986413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:59,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:51:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038082490] [2022-07-21 08:51:59,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:51:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:51:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:51:59,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 351 [2022-07-21 08:51:59,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 351 transitions, 800 flow. Second operand has 2 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 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 08:51:59,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:59,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 351 [2022-07-21 08:51:59,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:00,432 INFO L129 PetriNetUnfolder]: 328/2589 cut-off events. [2022-07-21 08:52:00,432 INFO L130 PetriNetUnfolder]: For 1461/1503 co-relation queries the response was YES. [2022-07-21 08:52:00,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 2589 events. 328/2589 cut-off events. For 1461/1503 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18411 event pairs, 201 based on Foata normal form. 2940/5385 useless extension candidates. Maximal degree in co-relation 1858. Up to 456 conditions per place. [2022-07-21 08:52:00,453 INFO L132 encePairwiseOnDemand]: 304/351 looper letters, 7 selfloop transitions, 0 changer transitions 27/303 dead transitions. [2022-07-21 08:52:00,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 303 transitions, 732 flow [2022-07-21 08:52:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:52:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:52:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 639 transitions. [2022-07-21 08:52:00,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9102564102564102 [2022-07-21 08:52:00,455 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 639 transitions. [2022-07-21 08:52:00,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 639 transitions. [2022-07-21 08:52:00,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:00,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 639 transitions. [2022-07-21 08:52:00,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 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 08:52:00,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 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 08:52:00,457 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 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 08:52:00,457 INFO L186 Difference]: Start difference. First operand has 312 places, 351 transitions, 800 flow. Second operand 2 states and 639 transitions. [2022-07-21 08:52:00,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 303 transitions, 732 flow [2022-07-21 08:52:00,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 303 transitions, 732 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:00,462 INFO L242 Difference]: Finished difference. Result has 312 places, 276 transitions, 629 flow [2022-07-21 08:52:00,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=629, PETRI_PLACES=312, PETRI_TRANSITIONS=276} [2022-07-21 08:52:00,463 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 0 predicate places. [2022-07-21 08:52:00,463 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 276 transitions, 629 flow [2022-07-21 08:52:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 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 08:52:00,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:00,464 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 08:52:00,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash -449386486, now seen corresponding path program 1 times [2022-07-21 08:52:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:00,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263331170] [2022-07-21 08:52:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:00,484 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 08:52:00,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:00,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263331170] [2022-07-21 08:52:00,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263331170] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:00,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:00,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550953712] [2022-07-21 08:52:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:00,487 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 351 [2022-07-21 08:52:00,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 276 transitions, 629 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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 08:52:00,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:00,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 351 [2022-07-21 08:52:00,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:00,557 INFO L129 PetriNetUnfolder]: 0/412 cut-off events. [2022-07-21 08:52:00,557 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-21 08:52:00,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 412 events. 0/412 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1268 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-21 08:52:00,558 INFO L132 encePairwiseOnDemand]: 348/351 looper letters, 16 selfloop transitions, 2 changer transitions 0/280 dead transitions. [2022-07-21 08:52:00,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 280 transitions, 673 flow [2022-07-21 08:52:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 865 transitions. [2022-07-21 08:52:00,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8214624881291548 [2022-07-21 08:52:00,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 865 transitions. [2022-07-21 08:52:00,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 865 transitions. [2022-07-21 08:52:00,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:00,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 865 transitions. [2022-07-21 08:52:00,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 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 08:52:00,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 08:52:00,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 08:52:00,568 INFO L186 Difference]: Start difference. First operand has 312 places, 276 transitions, 629 flow. Second operand 3 states and 865 transitions. [2022-07-21 08:52:00,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 280 transitions, 673 flow [2022-07-21 08:52:00,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 280 transitions, 631 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:00,574 INFO L242 Difference]: Finished difference. Result has 295 places, 277 transitions, 599 flow [2022-07-21 08:52:00,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=599, PETRI_PLACES=295, PETRI_TRANSITIONS=277} [2022-07-21 08:52:00,575 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, -17 predicate places. [2022-07-21 08:52:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 277 transitions, 599 flow [2022-07-21 08:52:00,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 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 08:52:00,576 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:00,576 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:00,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 08:52:00,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -999091199, now seen corresponding path program 1 times [2022-07-21 08:52:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:00,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321434318] [2022-07-21 08:52:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:00,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:00,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:00,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321434318] [2022-07-21 08:52:00,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321434318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:00,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56958018] [2022-07-21 08:52:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:00,631 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:00,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:52:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:00,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:00,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:00,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56958018] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:00,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:00,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198381236] [2022-07-21 08:52:00,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:00,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 351 [2022-07-21 08:52:00,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 277 transitions, 599 flow. Second operand has 10 states, 10 states have (on average 283.3) internal successors, (2833), 10 states have internal predecessors, (2833), 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 08:52:00,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:00,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 351 [2022-07-21 08:52:00,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:00,924 INFO L129 PetriNetUnfolder]: 0/386 cut-off events. [2022-07-21 08:52:00,924 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-21 08:52:00,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 386 events. 0/386 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1103 event pairs, 0 based on Foata normal form. 2/388 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-21 08:52:00,925 INFO L132 encePairwiseOnDemand]: 345/351 looper letters, 17 selfloop transitions, 9 changer transitions 0/287 dead transitions. [2022-07-21 08:52:00,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 287 transitions, 673 flow [2022-07-21 08:52:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2557 transitions. [2022-07-21 08:52:00,928 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8094333649889205 [2022-07-21 08:52:00,928 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2557 transitions. [2022-07-21 08:52:00,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2557 transitions. [2022-07-21 08:52:00,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:00,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2557 transitions. [2022-07-21 08:52:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.1111111111111) internal successors, (2557), 9 states have internal predecessors, (2557), 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 08:52:00,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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 08:52:00,937 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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 08:52:00,937 INFO L186 Difference]: Start difference. First operand has 295 places, 277 transitions, 599 flow. Second operand 9 states and 2557 transitions. [2022-07-21 08:52:00,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 287 transitions, 673 flow [2022-07-21 08:52:00,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 287 transitions, 671 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:00,940 INFO L242 Difference]: Finished difference. Result has 305 places, 283 transitions, 647 flow [2022-07-21 08:52:00,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=647, PETRI_PLACES=305, PETRI_TRANSITIONS=283} [2022-07-21 08:52:00,941 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, -7 predicate places. [2022-07-21 08:52:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 283 transitions, 647 flow [2022-07-21 08:52:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.3) internal successors, (2833), 10 states have internal predecessors, (2833), 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 08:52:00,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:00,942 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:00,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 08:52:01,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1645226418, now seen corresponding path program 1 times [2022-07-21 08:52:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26993064] [2022-07-21 08:52:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26993064] [2022-07-21 08:52:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26993064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428077227] [2022-07-21 08:52:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:01,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:01,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:52:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428077227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:01,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:01,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375124680] [2022-07-21 08:52:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:01,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 351 [2022-07-21 08:52:01,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 283 transitions, 647 flow. Second operand has 18 states, 18 states have (on average 283.6111111111111) internal successors, (5105), 18 states have internal predecessors, (5105), 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 08:52:01,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:01,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 351 [2022-07-21 08:52:01,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:01,688 INFO L129 PetriNetUnfolder]: 0/334 cut-off events. [2022-07-21 08:52:01,688 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 08:52:01,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 334 events. 0/334 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 739 event pairs, 0 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-21 08:52:01,689 INFO L132 encePairwiseOnDemand]: 345/351 looper letters, 25 selfloop transitions, 21 changer transitions 0/307 dead transitions. [2022-07-21 08:52:01,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 307 transitions, 847 flow [2022-07-21 08:52:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5951 transitions. [2022-07-21 08:52:01,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.807353140686474 [2022-07-21 08:52:01,695 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5951 transitions. [2022-07-21 08:52:01,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5951 transitions. [2022-07-21 08:52:01,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:01,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5951 transitions. [2022-07-21 08:52:01,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 283.3809523809524) internal successors, (5951), 21 states have internal predecessors, (5951), 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 08:52:01,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 351.0) internal successors, (7722), 22 states have internal predecessors, (7722), 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 08:52:01,711 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 351.0) internal successors, (7722), 22 states have internal predecessors, (7722), 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 08:52:01,711 INFO L186 Difference]: Start difference. First operand has 305 places, 283 transitions, 647 flow. Second operand 21 states and 5951 transitions. [2022-07-21 08:52:01,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 307 transitions, 847 flow [2022-07-21 08:52:01,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 307 transitions, 833 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:01,716 INFO L242 Difference]: Finished difference. Result has 329 places, 296 transitions, 771 flow [2022-07-21 08:52:01,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=771, PETRI_PLACES=329, PETRI_TRANSITIONS=296} [2022-07-21 08:52:01,717 INFO L279 CegarLoopForPetriNet]: 312 programPoint places, 17 predicate places. [2022-07-21 08:52:01,717 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 296 transitions, 771 flow [2022-07-21 08:52:01,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 283.6111111111111) internal successors, (5105), 18 states have internal predecessors, (5105), 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 08:52:01,718 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:01,719 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:01,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:01,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 08:52:01,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash 465601011, now seen corresponding path program 1 times [2022-07-21 08:52:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:01,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285440357] [2022-07-21 08:52:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:01,950 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:02,000 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:02,001 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:02,001 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:02,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:02,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 08:52:02,001 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:52:02,002 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:02,002 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-21 08:52:02,029 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-21 08:52:02,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 344 places, 388 transitions, 896 flow [2022-07-21 08:52:03,137 INFO L129 PetriNetUnfolder]: 1117/5237 cut-off events. [2022-07-21 08:52:03,137 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-21 08:52:03,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6322 conditions, 5237 events. 1117/5237 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 41992 event pairs, 522 based on Foata normal form. 0/4623 useless extension candidates. Maximal degree in co-relation 3281. Up to 1024 conditions per place. [2022-07-21 08:52:03,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 388 transitions, 896 flow [2022-07-21 08:52:03,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 388 transitions, 896 flow [2022-07-21 08:52:03,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:03,269 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:52:03,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:03,272 INFO L129 PetriNetUnfolder]: 3/91 cut-off events. [2022-07-21 08:52:03,272 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:03,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:03,273 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:03,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:03,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1171720694, now seen corresponding path program 1 times [2022-07-21 08:52:03,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:03,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862858656] [2022-07-21 08:52:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:03,288 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 08:52:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:03,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862858656] [2022-07-21 08:52:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862858656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:03,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:03,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874356764] [2022-07-21 08:52:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:03,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:03,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 388 [2022-07-21 08:52:03,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 388 transitions, 896 flow. Second operand has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:03,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:03,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 388 [2022-07-21 08:52:03,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:04,312 INFO L129 PetriNetUnfolder]: 776/4868 cut-off events. [2022-07-21 08:52:04,312 INFO L130 PetriNetUnfolder]: For 3201/3368 co-relation queries the response was YES. [2022-07-21 08:52:04,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7030 conditions, 4868 events. 776/4868 cut-off events. For 3201/3368 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40439 event pairs, 522 based on Foata normal form. 7279/11875 useless extension candidates. Maximal degree in co-relation 3545. Up to 1072 conditions per place. [2022-07-21 08:52:04,377 INFO L132 encePairwiseOnDemand]: 332/388 looper letters, 17 selfloop transitions, 2 changer transitions 28/338 dead transitions. [2022-07-21 08:52:04,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 338 transitions, 850 flow [2022-07-21 08:52:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2022-07-21 08:52:04,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.877147766323024 [2022-07-21 08:52:04,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2022-07-21 08:52:04,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2022-07-21 08:52:04,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:04,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2022-07-21 08:52:04,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 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 08:52:04,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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 08:52:04,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 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 08:52:04,382 INFO L186 Difference]: Start difference. First operand has 344 places, 388 transitions, 896 flow. Second operand 3 states and 1021 transitions. [2022-07-21 08:52:04,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 338 transitions, 850 flow [2022-07-21 08:52:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 338 transitions, 850 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:04,388 INFO L242 Difference]: Finished difference. Result has 346 places, 307 transitions, 720 flow [2022-07-21 08:52:04,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=346, PETRI_TRANSITIONS=307} [2022-07-21 08:52:04,389 INFO L279 CegarLoopForPetriNet]: 344 programPoint places, 2 predicate places. [2022-07-21 08:52:04,389 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 307 transitions, 720 flow [2022-07-21 08:52:04,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:04,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:04,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:04,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 08:52:04,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1952625124, now seen corresponding path program 1 times [2022-07-21 08:52:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350535280] [2022-07-21 08:52:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:04,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350535280] [2022-07-21 08:52:04,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350535280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:04,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320125583] [2022-07-21 08:52:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:04,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:04,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:52:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320125583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:04,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:04,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:04,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293545080] [2022-07-21 08:52:04,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:04,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-07-21 08:52:04,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 307 transitions, 720 flow. Second operand has 10 states, 10 states have (on average 312.3) internal successors, (3123), 10 states have internal predecessors, (3123), 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 08:52:04,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:04,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-07-21 08:52:04,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:04,785 INFO L129 PetriNetUnfolder]: 0/438 cut-off events. [2022-07-21 08:52:04,785 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-21 08:52:04,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 438 events. 0/438 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1313 event pairs, 0 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-21 08:52:04,786 INFO L132 encePairwiseOnDemand]: 382/388 looper letters, 18 selfloop transitions, 9 changer transitions 0/317 dead transitions. [2022-07-21 08:52:04,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 317 transitions, 796 flow [2022-07-21 08:52:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2819 transitions. [2022-07-21 08:52:04,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8072737686139748 [2022-07-21 08:52:04,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2819 transitions. [2022-07-21 08:52:04,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2819 transitions. [2022-07-21 08:52:04,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:04,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2819 transitions. [2022-07-21 08:52:04,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 313.22222222222223) internal successors, (2819), 9 states have internal predecessors, (2819), 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 08:52:04,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 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 08:52:04,796 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 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 08:52:04,796 INFO L186 Difference]: Start difference. First operand has 346 places, 307 transitions, 720 flow. Second operand 9 states and 2819 transitions. [2022-07-21 08:52:04,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 317 transitions, 796 flow [2022-07-21 08:52:04,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 317 transitions, 738 flow, removed 28 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:04,800 INFO L242 Difference]: Finished difference. Result has 336 places, 313 transitions, 712 flow [2022-07-21 08:52:04,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=712, PETRI_PLACES=336, PETRI_TRANSITIONS=313} [2022-07-21 08:52:04,801 INFO L279 CegarLoopForPetriNet]: 344 programPoint places, -8 predicate places. [2022-07-21 08:52:04,801 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 313 transitions, 712 flow [2022-07-21 08:52:04,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 312.3) internal successors, (3123), 10 states have internal predecessors, (3123), 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 08:52:04,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:04,802 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:04,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 08:52:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-21 08:52:05,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -224208869, now seen corresponding path program 1 times [2022-07-21 08:52:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734656254] [2022-07-21 08:52:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734656254] [2022-07-21 08:52:05,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734656254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103279087] [2022-07-21 08:52:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:05,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:05,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:05,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:05,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:52:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103279087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:05,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:05,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20737835] [2022-07-21 08:52:05,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:05,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:05,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-07-21 08:52:05,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 313 transitions, 712 flow. Second operand has 18 states, 18 states have (on average 312.6111111111111) internal successors, (5627), 18 states have internal predecessors, (5627), 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 08:52:05,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:05,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-07-21 08:52:05,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:05,573 INFO L129 PetriNetUnfolder]: 0/386 cut-off events. [2022-07-21 08:52:05,574 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-21 08:52:05,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 386 events. 0/386 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 948 event pairs, 0 based on Foata normal form. 4/390 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:52:05,575 INFO L132 encePairwiseOnDemand]: 382/388 looper letters, 26 selfloop transitions, 21 changer transitions 0/337 dead transitions. [2022-07-21 08:52:05,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 337 transitions, 914 flow [2022-07-21 08:52:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6561 transitions. [2022-07-21 08:52:05,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8052282768777614 [2022-07-21 08:52:05,579 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6561 transitions. [2022-07-21 08:52:05,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6561 transitions. [2022-07-21 08:52:05,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:05,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6561 transitions. [2022-07-21 08:52:05,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 312.42857142857144) internal successors, (6561), 21 states have internal predecessors, (6561), 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 08:52:05,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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 08:52:05,592 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 388.0) internal successors, (8536), 22 states have internal predecessors, (8536), 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 08:52:05,592 INFO L186 Difference]: Start difference. First operand has 336 places, 313 transitions, 712 flow. Second operand 21 states and 6561 transitions. [2022-07-21 08:52:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 337 transitions, 914 flow [2022-07-21 08:52:05,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 337 transitions, 900 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:05,597 INFO L242 Difference]: Finished difference. Result has 360 places, 326 transitions, 836 flow [2022-07-21 08:52:05,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=836, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-07-21 08:52:05,598 INFO L279 CegarLoopForPetriNet]: 344 programPoint places, 16 predicate places. [2022-07-21 08:52:05,598 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 836 flow [2022-07-21 08:52:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 312.6111111111111) internal successors, (5627), 18 states have internal predecessors, (5627), 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 08:52:05,598 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:05,598 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:05,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 08:52:05,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -499491947, now seen corresponding path program 1 times [2022-07-21 08:52:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:05,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128565810] [2022-07-21 08:52:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128565810] [2022-07-21 08:52:05,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128565810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035835379] [2022-07-21 08:52:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:05,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:05,949 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:05,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 08:52:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:06,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:06,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035835379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:06,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:06,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132952349] [2022-07-21 08:52:06,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:06,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 388 [2022-07-21 08:52:06,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 836 flow. Second operand has 34 states, 34 states have (on average 312.79411764705884) internal successors, (10635), 34 states have internal predecessors, (10635), 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 08:52:06,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:06,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 388 [2022-07-21 08:52:06,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:06,698 INFO L129 PetriNetUnfolder]: 0/360 cut-off events. [2022-07-21 08:52:06,698 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-21 08:52:06,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 360 events. 0/360 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 793 event pairs, 0 based on Foata normal form. 2/362 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-21 08:52:06,699 INFO L132 encePairwiseOnDemand]: 383/388 looper letters, 27 selfloop transitions, 25 changer transitions 0/330 dead transitions. [2022-07-21 08:52:06,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 330 transitions, 980 flow [2022-07-21 08:52:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 08:52:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-21 08:52:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 8424 transitions. [2022-07-21 08:52:06,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8041237113402062 [2022-07-21 08:52:06,705 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 8424 transitions. [2022-07-21 08:52:06,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 8424 transitions. [2022-07-21 08:52:06,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:06,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 8424 transitions. [2022-07-21 08:52:06,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 312.0) internal successors, (8424), 27 states have internal predecessors, (8424), 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 08:52:06,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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 08:52:06,722 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 388.0) internal successors, (10864), 28 states have internal predecessors, (10864), 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 08:52:06,722 INFO L186 Difference]: Start difference. First operand has 360 places, 326 transitions, 836 flow. Second operand 27 states and 8424 transitions. [2022-07-21 08:52:06,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 330 transitions, 980 flow [2022-07-21 08:52:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 330 transitions, 926 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-21 08:52:06,727 INFO L242 Difference]: Finished difference. Result has 360 places, 316 transitions, 819 flow [2022-07-21 08:52:06,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=819, PETRI_PLACES=360, PETRI_TRANSITIONS=316} [2022-07-21 08:52:06,728 INFO L279 CegarLoopForPetriNet]: 344 programPoint places, 16 predicate places. [2022-07-21 08:52:06,728 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 316 transitions, 819 flow [2022-07-21 08:52:06,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 312.79411764705884) internal successors, (10635), 34 states have internal predecessors, (10635), 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 08:52:06,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:06,730 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:06,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:06,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 08:52:06,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash -356466964, now seen corresponding path program 1 times [2022-07-21 08:52:06,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:06,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906904476] [2022-07-21 08:52:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:06,962 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:06,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:06,994 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:06,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:06,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:06,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 08:52:06,994 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:52:06,995 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:06,995 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-21 08:52:07,023 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-21 08:52:07,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 376 places, 425 transitions, 994 flow [2022-07-21 08:52:09,611 INFO L129 PetriNetUnfolder]: 2408/10171 cut-off events. [2022-07-21 08:52:09,611 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-21 08:52:09,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12548 conditions, 10171 events. 2408/10171 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 94804 event pairs, 1291 based on Foata normal form. 0/9033 useless extension candidates. Maximal degree in co-relation 6304. Up to 2304 conditions per place. [2022-07-21 08:52:09,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 425 transitions, 994 flow [2022-07-21 08:52:09,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 425 transitions, 994 flow [2022-07-21 08:52:09,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:09,987 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:52:09,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:09,990 INFO L129 PetriNetUnfolder]: 4/99 cut-off events. [2022-07-21 08:52:09,990 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:09,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:09,990 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:09,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1968410871, now seen corresponding path program 1 times [2022-07-21 08:52:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:09,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817711277] [2022-07-21 08:52:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:10,001 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 08:52:10,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:10,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817711277] [2022-07-21 08:52:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817711277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:10,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:10,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:52:10,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040854724] [2022-07-21 08:52:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:52:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:52:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:52:10,004 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 425 [2022-07-21 08:52:10,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 425 transitions, 994 flow. Second operand has 2 states, 2 states have (on average 347.5) internal successors, (695), 2 states have internal predecessors, (695), 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 08:52:10,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:10,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 425 [2022-07-21 08:52:10,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:12,352 INFO L129 PetriNetUnfolder]: 1802/9555 cut-off events. [2022-07-21 08:52:12,352 INFO L130 PetriNetUnfolder]: For 7118/7158 co-relation queries the response was YES. [2022-07-21 08:52:12,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14246 conditions, 9555 events. 1802/9555 cut-off events. For 7118/7158 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 91588 event pairs, 1291 based on Foata normal form. 14546/23569 useless extension candidates. Maximal degree in co-relation 6987. Up to 2314 conditions per place. [2022-07-21 08:52:12,434 INFO L132 encePairwiseOnDemand]: 366/425 looper letters, 9 selfloop transitions, 0 changer transitions 29/365 dead transitions. [2022-07-21 08:52:12,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 365 transitions, 910 flow [2022-07-21 08:52:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:52:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:52:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 771 transitions. [2022-07-21 08:52:12,436 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9070588235294118 [2022-07-21 08:52:12,436 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 771 transitions. [2022-07-21 08:52:12,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 771 transitions. [2022-07-21 08:52:12,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:12,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 771 transitions. [2022-07-21 08:52:12,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 385.5) internal successors, (771), 2 states have internal predecessors, (771), 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 08:52:12,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 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 08:52:12,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 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 08:52:12,439 INFO L186 Difference]: Start difference. First operand has 376 places, 425 transitions, 994 flow. Second operand 2 states and 771 transitions. [2022-07-21 08:52:12,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 365 transitions, 910 flow [2022-07-21 08:52:12,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 365 transitions, 910 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:12,444 INFO L242 Difference]: Finished difference. Result has 376 places, 336 transitions, 789 flow [2022-07-21 08:52:12,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=789, PETRI_PLACES=376, PETRI_TRANSITIONS=336} [2022-07-21 08:52:12,445 INFO L279 CegarLoopForPetriNet]: 376 programPoint places, 0 predicate places. [2022-07-21 08:52:12,445 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 336 transitions, 789 flow [2022-07-21 08:52:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 347.5) internal successors, (695), 2 states have internal predecessors, (695), 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 08:52:12,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:12,446 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:12,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 08:52:12,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2033153418, now seen corresponding path program 1 times [2022-07-21 08:52:12,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:12,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231323776] [2022-07-21 08:52:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:12,476 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 08:52:12,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231323776] [2022-07-21 08:52:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231323776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:12,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:12,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148807506] [2022-07-21 08:52:12,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:12,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 425 [2022-07-21 08:52:12,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 336 transitions, 789 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 08:52:12,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:12,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 425 [2022-07-21 08:52:12,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:12,569 INFO L129 PetriNetUnfolder]: 0/516 cut-off events. [2022-07-21 08:52:12,570 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-21 08:52:12,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 516 events. 0/516 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1670 event pairs, 0 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-21 08:52:12,571 INFO L132 encePairwiseOnDemand]: 422/425 looper letters, 18 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-07-21 08:52:12,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 340 transitions, 837 flow [2022-07-21 08:52:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2022-07-21 08:52:12,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164705882352942 [2022-07-21 08:52:12,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2022-07-21 08:52:12,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2022-07-21 08:52:12,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:12,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2022-07-21 08:52:12,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 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 08:52:12,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 08:52:12,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 08:52:12,575 INFO L186 Difference]: Start difference. First operand has 376 places, 336 transitions, 789 flow. Second operand 3 states and 1041 transitions. [2022-07-21 08:52:12,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 340 transitions, 837 flow [2022-07-21 08:52:12,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 340 transitions, 765 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:12,580 INFO L242 Difference]: Finished difference. Result has 359 places, 337 transitions, 729 flow [2022-07-21 08:52:12,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=729, PETRI_PLACES=359, PETRI_TRANSITIONS=337} [2022-07-21 08:52:12,583 INFO L279 CegarLoopForPetriNet]: 376 programPoint places, -17 predicate places. [2022-07-21 08:52:12,583 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 337 transitions, 729 flow [2022-07-21 08:52:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 08:52:12,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:12,583 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 08:52:12,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1858574233, now seen corresponding path program 1 times [2022-07-21 08:52:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722693655] [2022-07-21 08:52:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722693655] [2022-07-21 08:52:12,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722693655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733312757] [2022-07-21 08:52:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:12,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:12,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 08:52:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:12,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:12,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733312757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:12,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:12,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643771896] [2022-07-21 08:52:12,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:12,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-07-21 08:52:12,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 337 transitions, 729 flow. Second operand has 10 states, 10 states have (on average 341.3) internal successors, (3413), 10 states have internal predecessors, (3413), 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 08:52:12,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:12,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-07-21 08:52:12,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:12,961 INFO L129 PetriNetUnfolder]: 0/490 cut-off events. [2022-07-21 08:52:12,961 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-21 08:52:12,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 490 events. 0/490 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1515 event pairs, 0 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-21 08:52:12,962 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 19 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-07-21 08:52:12,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 347 transitions, 807 flow [2022-07-21 08:52:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3081 transitions. [2022-07-21 08:52:12,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8054901960784314 [2022-07-21 08:52:12,965 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3081 transitions. [2022-07-21 08:52:12,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3081 transitions. [2022-07-21 08:52:12,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:12,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3081 transitions. [2022-07-21 08:52:12,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 342.3333333333333) internal successors, (3081), 9 states have internal predecessors, (3081), 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 08:52:12,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 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 08:52:12,971 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 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 08:52:12,971 INFO L186 Difference]: Start difference. First operand has 359 places, 337 transitions, 729 flow. Second operand 9 states and 3081 transitions. [2022-07-21 08:52:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 347 transitions, 807 flow [2022-07-21 08:52:12,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 347 transitions, 805 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:12,975 INFO L242 Difference]: Finished difference. Result has 369 places, 343 transitions, 777 flow [2022-07-21 08:52:12,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=369, PETRI_TRANSITIONS=343} [2022-07-21 08:52:12,976 INFO L279 CegarLoopForPetriNet]: 376 programPoint places, -7 predicate places. [2022-07-21 08:52:12,977 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 343 transitions, 777 flow [2022-07-21 08:52:12,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.3) internal successors, (3413), 10 states have internal predecessors, (3413), 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 08:52:12,977 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:12,977 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:13,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:13,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -92949148, now seen corresponding path program 1 times [2022-07-21 08:52:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608073247] [2022-07-21 08:52:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:13,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608073247] [2022-07-21 08:52:13,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608073247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:13,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767836714] [2022-07-21 08:52:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:13,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:13,269 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:13,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 08:52:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:13,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:13,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767836714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:13,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025900019] [2022-07-21 08:52:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:13,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:13,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-07-21 08:52:13,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 343 transitions, 777 flow. Second operand has 18 states, 18 states have (on average 341.6111111111111) internal successors, (6149), 18 states have internal predecessors, (6149), 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 08:52:13,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:13,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-07-21 08:52:13,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:13,846 INFO L129 PetriNetUnfolder]: 0/438 cut-off events. [2022-07-21 08:52:13,847 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:52:13,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 438 events. 0/438 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1156 event pairs, 0 based on Foata normal form. 4/442 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:52:13,863 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 27 selfloop transitions, 21 changer transitions 0/367 dead transitions. [2022-07-21 08:52:13,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 367 transitions, 981 flow [2022-07-21 08:52:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7171 transitions. [2022-07-21 08:52:13,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8034733893557423 [2022-07-21 08:52:13,891 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7171 transitions. [2022-07-21 08:52:13,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7171 transitions. [2022-07-21 08:52:13,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:13,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7171 transitions. [2022-07-21 08:52:13,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 341.4761904761905) internal successors, (7171), 21 states have internal predecessors, (7171), 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 08:52:13,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 425.0) internal successors, (9350), 22 states have internal predecessors, (9350), 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 08:52:13,919 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 425.0) internal successors, (9350), 22 states have internal predecessors, (9350), 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 08:52:13,919 INFO L186 Difference]: Start difference. First operand has 369 places, 343 transitions, 777 flow. Second operand 21 states and 7171 transitions. [2022-07-21 08:52:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 367 transitions, 981 flow [2022-07-21 08:52:13,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 367 transitions, 967 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:13,930 INFO L242 Difference]: Finished difference. Result has 393 places, 356 transitions, 901 flow [2022-07-21 08:52:13,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=901, PETRI_PLACES=393, PETRI_TRANSITIONS=356} [2022-07-21 08:52:13,931 INFO L279 CegarLoopForPetriNet]: 376 programPoint places, 17 predicate places. [2022-07-21 08:52:13,931 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 356 transitions, 901 flow [2022-07-21 08:52:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 341.6111111111111) internal successors, (6149), 18 states have internal predecessors, (6149), 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 08:52:13,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:13,932 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:13,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 08:52:14,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -611735190, now seen corresponding path program 1 times [2022-07-21 08:52:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:14,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792072918] [2022-07-21 08:52:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792072918] [2022-07-21 08:52:14,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792072918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879867633] [2022-07-21 08:52:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:14,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:14,271 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 08:52:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:14,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:14,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879867633] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:14,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:14,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036550244] [2022-07-21 08:52:14,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:14,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 425 [2022-07-21 08:52:14,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 356 transitions, 901 flow. Second operand has 34 states, 34 states have (on average 341.79411764705884) internal successors, (11621), 34 states have internal predecessors, (11621), 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 08:52:14,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:14,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 425 [2022-07-21 08:52:14,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:15,162 INFO L129 PetriNetUnfolder]: 0/399 cut-off events. [2022-07-21 08:52:15,162 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-21 08:52:15,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 399 events. 0/399 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 909 event pairs, 0 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-21 08:52:15,163 INFO L132 encePairwiseOnDemand]: 420/425 looper letters, 30 selfloop transitions, 28 changer transitions 0/365 dead transitions. [2022-07-21 08:52:15,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 365 transitions, 1091 flow [2022-07-21 08:52:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:52:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:52:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10231 transitions. [2022-07-21 08:52:15,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024313725490196 [2022-07-21 08:52:15,172 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10231 transitions. [2022-07-21 08:52:15,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10231 transitions. [2022-07-21 08:52:15,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:15,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10231 transitions. [2022-07-21 08:52:15,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 341.03333333333336) internal successors, (10231), 30 states have internal predecessors, (10231), 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 08:52:15,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 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 08:52:15,192 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 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 08:52:15,192 INFO L186 Difference]: Start difference. First operand has 393 places, 356 transitions, 901 flow. Second operand 30 states and 10231 transitions. [2022-07-21 08:52:15,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 365 transitions, 1091 flow [2022-07-21 08:52:15,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 365 transitions, 1031 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-21 08:52:15,198 INFO L242 Difference]: Finished difference. Result has 396 places, 349 transitions, 908 flow [2022-07-21 08:52:15,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=908, PETRI_PLACES=396, PETRI_TRANSITIONS=349} [2022-07-21 08:52:15,198 INFO L279 CegarLoopForPetriNet]: 376 programPoint places, 20 predicate places. [2022-07-21 08:52:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 349 transitions, 908 flow [2022-07-21 08:52:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 341.79411764705884) internal successors, (11621), 34 states have internal predecessors, (11621), 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 08:52:15,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:15,201 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:15,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 08:52:15,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1827515892, now seen corresponding path program 1 times [2022-07-21 08:52:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:15,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423627678] [2022-07-21 08:52:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:15,435 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:15,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:15,455 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:15,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:15,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 08:52:15,456 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:15,456 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:15,456 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-21 08:52:15,483 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-21 08:52:15,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 408 places, 462 transitions, 1094 flow [2022-07-21 08:52:20,166 INFO L129 PetriNetUnfolder]: 5235/20225 cut-off events. [2022-07-21 08:52:20,167 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-21 08:52:20,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25431 conditions, 20225 events. 5235/20225 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 215170 event pairs, 3084 based on Foata normal form. 0/18051 useless extension candidates. Maximal degree in co-relation 12528. Up to 5120 conditions per place. [2022-07-21 08:52:20,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 408 places, 462 transitions, 1094 flow [2022-07-21 08:52:21,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 408 places, 462 transitions, 1094 flow [2022-07-21 08:52:21,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:21,050 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@61c12817, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7361e1c [2022-07-21 08:52:21,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:52:21,054 INFO L129 PetriNetUnfolder]: 3/91 cut-off events. [2022-07-21 08:52:21,054 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:21,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:21,054 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:21,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 868704265, now seen corresponding path program 1 times [2022-07-21 08:52:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074928461] [2022-07-21 08:52:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:21,065 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 08:52:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074928461] [2022-07-21 08:52:21,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074928461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:21,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:21,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:52:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126953781] [2022-07-21 08:52:21,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:52:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:52:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:52:21,068 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 462 [2022-07-21 08:52:21,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 462 transitions, 1094 flow. Second operand has 2 states, 2 states have (on average 376.5) internal successors, (753), 2 states have internal predecessors, (753), 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 08:52:21,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:21,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 462 [2022-07-21 08:52:21,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:26,144 INFO L129 PetriNetUnfolder]: 4107/19086 cut-off events. [2022-07-21 08:52:26,144 INFO L130 PetriNetUnfolder]: For 15639/15697 co-relation queries the response was YES. [2022-07-21 08:52:26,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29423 conditions, 19086 events. 4107/19086 cut-off events. For 15639/15697 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 206951 event pairs, 3084 based on Foata normal form. 32006/50046 useless extension candidates. Maximal degree in co-relation 14225. Up to 5131 conditions per place. [2022-07-21 08:52:26,462 INFO L132 encePairwiseOnDemand]: 397/462 looper letters, 10 selfloop transitions, 0 changer transitions 30/396 dead transitions. [2022-07-21 08:52:26,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 396 transitions, 1002 flow [2022-07-21 08:52:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:52:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:52:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 837 transitions. [2022-07-21 08:52:26,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9058441558441559 [2022-07-21 08:52:26,464 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 837 transitions. [2022-07-21 08:52:26,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 837 transitions. [2022-07-21 08:52:26,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:26,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 837 transitions. [2022-07-21 08:52:26,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 418.5) internal successors, (837), 2 states have internal predecessors, (837), 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 08:52:26,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 08:52:26,466 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 08:52:26,466 INFO L186 Difference]: Start difference. First operand has 408 places, 462 transitions, 1094 flow. Second operand 2 states and 837 transitions. [2022-07-21 08:52:26,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 396 transitions, 1002 flow [2022-07-21 08:52:26,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 396 transitions, 1002 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:26,475 INFO L242 Difference]: Finished difference. Result has 408 places, 366 transitions, 872 flow [2022-07-21 08:52:26,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=872, PETRI_PLACES=408, PETRI_TRANSITIONS=366} [2022-07-21 08:52:26,476 INFO L279 CegarLoopForPetriNet]: 408 programPoint places, 0 predicate places. [2022-07-21 08:52:26,476 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 366 transitions, 872 flow [2022-07-21 08:52:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 376.5) internal successors, (753), 2 states have internal predecessors, (753), 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 08:52:26,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:26,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:26,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 08:52:26,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 575301258, now seen corresponding path program 1 times [2022-07-21 08:52:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310099131] [2022-07-21 08:52:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:26,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:26,492 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 08:52:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:26,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310099131] [2022-07-21 08:52:26,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310099131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:26,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:26,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703524021] [2022-07-21 08:52:26,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:26,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:26,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:26,494 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 462 [2022-07-21 08:52:26,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 366 transitions, 872 flow. Second operand has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 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 08:52:26,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:26,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 462 [2022-07-21 08:52:26,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:26,600 INFO L129 PetriNetUnfolder]: 0/568 cut-off events. [2022-07-21 08:52:26,600 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-21 08:52:26,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 568 events. 0/568 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1884 event pairs, 0 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-21 08:52:26,601 INFO L132 encePairwiseOnDemand]: 459/462 looper letters, 19 selfloop transitions, 2 changer transitions 0/370 dead transitions. [2022-07-21 08:52:26,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 370 transitions, 922 flow [2022-07-21 08:52:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1129 transitions. [2022-07-21 08:52:26,603 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8145743145743146 [2022-07-21 08:52:26,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1129 transitions. [2022-07-21 08:52:26,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1129 transitions. [2022-07-21 08:52:26,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:26,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1129 transitions. [2022-07-21 08:52:26,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.3333333333333) internal successors, (1129), 3 states have internal predecessors, (1129), 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 08:52:26,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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 08:52:26,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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 08:52:26,605 INFO L186 Difference]: Start difference. First operand has 408 places, 366 transitions, 872 flow. Second operand 3 states and 1129 transitions. [2022-07-21 08:52:26,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 370 transitions, 922 flow [2022-07-21 08:52:26,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 370 transitions, 832 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:26,610 INFO L242 Difference]: Finished difference. Result has 391 places, 367 transitions, 794 flow [2022-07-21 08:52:26,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=391, PETRI_TRANSITIONS=367} [2022-07-21 08:52:26,611 INFO L279 CegarLoopForPetriNet]: 408 programPoint places, -17 predicate places. [2022-07-21 08:52:26,611 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 367 transitions, 794 flow [2022-07-21 08:52:26,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 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 08:52:26,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:26,611 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:26,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 08:52:26,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 452212618, now seen corresponding path program 1 times [2022-07-21 08:52:26,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:26,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648461777] [2022-07-21 08:52:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:26,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648461777] [2022-07-21 08:52:26,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648461777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315362037] [2022-07-21 08:52:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:26,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:26,648 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:26,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 08:52:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:26,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:26,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315362037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:26,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:26,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012364032] [2022-07-21 08:52:26,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:26,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:26,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-07-21 08:52:26,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 367 transitions, 794 flow. Second operand has 10 states, 10 states have (on average 370.3) internal successors, (3703), 10 states have internal predecessors, (3703), 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 08:52:26,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:26,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-07-21 08:52:26,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:26,979 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-21 08:52:26,979 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-21 08:52:26,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 542 events. 0/542 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1722 event pairs, 0 based on Foata normal form. 2/544 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-21 08:52:26,981 INFO L132 encePairwiseOnDemand]: 456/462 looper letters, 20 selfloop transitions, 9 changer transitions 0/377 dead transitions. [2022-07-21 08:52:26,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 377 transitions, 874 flow [2022-07-21 08:52:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3343 transitions. [2022-07-21 08:52:26,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.803992303992304 [2022-07-21 08:52:26,983 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3343 transitions. [2022-07-21 08:52:26,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3343 transitions. [2022-07-21 08:52:26,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:26,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3343 transitions. [2022-07-21 08:52:26,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 371.44444444444446) internal successors, (3343), 9 states have internal predecessors, (3343), 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 08:52:26,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 462.0) internal successors, (4620), 10 states have internal predecessors, (4620), 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 08:52:26,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 462.0) internal successors, (4620), 10 states have internal predecessors, (4620), 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 08:52:26,988 INFO L186 Difference]: Start difference. First operand has 391 places, 367 transitions, 794 flow. Second operand 9 states and 3343 transitions. [2022-07-21 08:52:26,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 377 transitions, 874 flow [2022-07-21 08:52:26,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 377 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:26,993 INFO L242 Difference]: Finished difference. Result has 401 places, 373 transitions, 842 flow [2022-07-21 08:52:26,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=401, PETRI_TRANSITIONS=373} [2022-07-21 08:52:26,994 INFO L279 CegarLoopForPetriNet]: 408 programPoint places, -7 predicate places. [2022-07-21 08:52:26,994 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 373 transitions, 842 flow [2022-07-21 08:52:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 370.3) internal successors, (3703), 10 states have internal predecessors, (3703), 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 08:52:26,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:26,995 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:27,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 08:52:27,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:27,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2039005581, now seen corresponding path program 1 times [2022-07-21 08:52:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000532232] [2022-07-21 08:52:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000532232] [2022-07-21 08:52:27,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000532232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209363353] [2022-07-21 08:52:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:27,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:27,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 08:52:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:27,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:27,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209363353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:27,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12600244] [2022-07-21 08:52:27,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:27,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:27,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:27,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-07-21 08:52:27,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 373 transitions, 842 flow. Second operand has 18 states, 18 states have (on average 370.6111111111111) internal successors, (6671), 18 states have internal predecessors, (6671), 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 08:52:27,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:27,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-07-21 08:52:27,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:27,918 INFO L129 PetriNetUnfolder]: 0/490 cut-off events. [2022-07-21 08:52:27,919 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-21 08:52:27,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 490 events. 0/490 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1357 event pairs, 0 based on Foata normal form. 4/494 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 08:52:27,920 INFO L132 encePairwiseOnDemand]: 456/462 looper letters, 28 selfloop transitions, 21 changer transitions 0/397 dead transitions. [2022-07-21 08:52:27,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 397 transitions, 1048 flow [2022-07-21 08:52:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7781 transitions. [2022-07-21 08:52:27,924 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019995877138735 [2022-07-21 08:52:27,924 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7781 transitions. [2022-07-21 08:52:27,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7781 transitions. [2022-07-21 08:52:27,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:27,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7781 transitions. [2022-07-21 08:52:27,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 370.5238095238095) internal successors, (7781), 21 states have internal predecessors, (7781), 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 08:52:27,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 462.0) internal successors, (10164), 22 states have internal predecessors, (10164), 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 08:52:27,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 462.0) internal successors, (10164), 22 states have internal predecessors, (10164), 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 08:52:27,935 INFO L186 Difference]: Start difference. First operand has 401 places, 373 transitions, 842 flow. Second operand 21 states and 7781 transitions. [2022-07-21 08:52:27,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 397 transitions, 1048 flow [2022-07-21 08:52:27,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 397 transitions, 1034 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:27,941 INFO L242 Difference]: Finished difference. Result has 425 places, 386 transitions, 966 flow [2022-07-21 08:52:27,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=966, PETRI_PLACES=425, PETRI_TRANSITIONS=386} [2022-07-21 08:52:27,942 INFO L279 CegarLoopForPetriNet]: 408 programPoint places, 17 predicate places. [2022-07-21 08:52:27,942 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 386 transitions, 966 flow [2022-07-21 08:52:27,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 370.6111111111111) internal successors, (6671), 18 states have internal predecessors, (6671), 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 08:52:27,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:27,943 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:27,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:28,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:28,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 81818271, now seen corresponding path program 1 times [2022-07-21 08:52:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208072858] [2022-07-21 08:52:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208072858] [2022-07-21 08:52:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208072858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138811823] [2022-07-21 08:52:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:28,318 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:28,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 08:52:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:28,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:28,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138811823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:28,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:28,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:52:28,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220179223] [2022-07-21 08:52:28,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:28,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:52:28,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:52:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:52:28,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 368 out of 462 [2022-07-21 08:52:28,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 386 transitions, 966 flow. Second operand has 34 states, 34 states have (on average 370.79411764705884) internal successors, (12607), 34 states have internal predecessors, (12607), 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 08:52:28,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:28,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 368 of 462 [2022-07-21 08:52:28,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:29,207 INFO L129 PetriNetUnfolder]: 0/438 cut-off events. [2022-07-21 08:52:29,207 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-21 08:52:29,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 438 events. 0/438 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1025 event pairs, 0 based on Foata normal form. 4/442 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-21 08:52:29,208 INFO L132 encePairwiseOnDemand]: 457/462 looper letters, 33 selfloop transitions, 31 changer transitions 0/400 dead transitions. [2022-07-21 08:52:29,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 400 transitions, 1202 flow [2022-07-21 08:52:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 08:52:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-21 08:52:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 12212 transitions. [2022-07-21 08:52:29,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8009969828151646 [2022-07-21 08:52:29,215 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 12212 transitions. [2022-07-21 08:52:29,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 12212 transitions. [2022-07-21 08:52:29,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:29,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 12212 transitions. [2022-07-21 08:52:29,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 370.06060606060606) internal successors, (12212), 33 states have internal predecessors, (12212), 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 08:52:29,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 462.0) internal successors, (15708), 34 states have internal predecessors, (15708), 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 08:52:29,235 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 462.0) internal successors, (15708), 34 states have internal predecessors, (15708), 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 08:52:29,235 INFO L186 Difference]: Start difference. First operand has 425 places, 386 transitions, 966 flow. Second operand 33 states and 12212 transitions. [2022-07-21 08:52:29,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 400 transitions, 1202 flow [2022-07-21 08:52:29,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 400 transitions, 1136 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-21 08:52:29,242 INFO L242 Difference]: Finished difference. Result has 431 places, 382 transitions, 997 flow [2022-07-21 08:52:29,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=997, PETRI_PLACES=431, PETRI_TRANSITIONS=382} [2022-07-21 08:52:29,242 INFO L279 CegarLoopForPetriNet]: 408 programPoint places, 23 predicate places. [2022-07-21 08:52:29,243 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 382 transitions, 997 flow [2022-07-21 08:52:29,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 370.79411764705884) internal successors, (12607), 34 states have internal predecessors, (12607), 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 08:52:29,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:29,244 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:29,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:29,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:29,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:52:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2034615245, now seen corresponding path program 1 times [2022-07-21 08:52:29,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:29,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966568254] [2022-07-21 08:52:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:29,480 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:29,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:29,502 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:29,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:52:29,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:52:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 08:52:29,503 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:52:29,503 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:29,503 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-21 08:52:29,529 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-21 08:52:29,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 440 places, 499 transitions, 1196 flow [2022-07-21 08:52:40,179 INFO L129 PetriNetUnfolder]: 11390/40775 cut-off events. [2022-07-21 08:52:40,180 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-21 08:52:42,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52139 conditions, 40775 events. 11390/40775 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 480196 event pairs, 7181 based on Foata normal form. 0/36541 useless extension candidates. Maximal degree in co-relation 25409. Up to 11264 conditions per place. [2022-07-21 08:52:42,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 499 transitions, 1196 flow