./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:34:31,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:34:31,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:34:31,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:34:31,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:34:31,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:34:31,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:34:31,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:34:31,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:34:31,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:34:31,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:34:31,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:34:31,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:34:31,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:34:31,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:34:31,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:34:31,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:34:31,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:34:31,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:34:31,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:34:31,942 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:34:31,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:34:31,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:34:31,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:34:31,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:34:31,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:34:31,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:34:31,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:34:31,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:34:31,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:34:31,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:34:31,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:34:31,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:34:31,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:34:31,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:34:31,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:34:31,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:34:31,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:34:31,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:34:31,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:34:31,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:34:31,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:34:31,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:34:31,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:34:31,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:34:31,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:34:31,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:34:31,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:34:31,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:34:31,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:34:31,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:34:31,985 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:34:31,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:34:31,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:34:31,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:34:31,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:34:31,987 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:34:31,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:34:31,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:34:31,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:34:31,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:34:31,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:31,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:34:31,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:34:31,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:34:31,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-07-22 21:34:32,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:34:32,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:34:32,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:34:32,187 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:34:32,187 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:34:32,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-07-22 21:34:32,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19997b475/f25e3067914d41d8a748df4588060b3a/FLAG471960af7 [2022-07-22 21:34:32,649 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:34:32,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-07-22 21:34:32,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19997b475/f25e3067914d41d8a748df4588060b3a/FLAG471960af7 [2022-07-22 21:34:32,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19997b475/f25e3067914d41d8a748df4588060b3a [2022-07-22 21:34:33,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:34:33,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:34:33,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:33,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:34:33,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:34:33,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e45a08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33, skipping insertion in model container [2022-07-22 21:34:33,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:34:33,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:34:33,350 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_75-tricky_address2_racefree.i[41323,41336] [2022-07-22 21:34:33,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:33,393 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:34:33,433 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_75-tricky_address2_racefree.i[41323,41336] [2022-07-22 21:34:33,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:34:33,495 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:34:33,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33 WrapperNode [2022-07-22 21:34:33,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:34:33,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:33,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:34:33,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:34:33,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,558 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-07-22 21:34:33,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:34:33,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:34:33,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:34:33,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:34:33,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:34:33,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:34:33,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:34:33,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:34:33,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (1/1) ... [2022-07-22 21:34:33,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:34:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:33,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:34:33,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:34:33,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:34:33,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:34:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:34:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:34:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:34:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:34:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:34:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:34:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:34:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:34:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:34:33,726 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:34:33,836 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:34:33,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:34:34,008 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:34:34,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:34:34,014 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-22 21:34:34,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:34 BoogieIcfgContainer [2022-07-22 21:34:34,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:34:34,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:34:34,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:34:34,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:34:34,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:34:33" (1/3) ... [2022-07-22 21:34:34,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:34, skipping insertion in model container [2022-07-22 21:34:34,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:34:33" (2/3) ... [2022-07-22 21:34:34,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:34:34, skipping insertion in model container [2022-07-22 21:34:34,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:34:34" (3/3) ... [2022-07-22 21:34:34,021 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-07-22 21:34:34,024 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:34:34,030 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:34:34,030 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:34:34,030 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:34:34,064 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:34:34,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-07-22 21:34:34,138 INFO L129 PetriNetUnfolder]: 45/269 cut-off events. [2022-07-22 21:34:34,139 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-22 21:34:34,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 860 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-07-22 21:34:34,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-07-22 21:34:34,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-07-22 21:34:34,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:34,158 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@28491498, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59b8f383 [2022-07-22 21:34:34,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:34:34,171 INFO L129 PetriNetUnfolder]: 12/127 cut-off events. [2022-07-22 21:34:34,171 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:34,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:34,171 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] [2022-07-22 21:34:34,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1893756395, now seen corresponding path program 1 times [2022-07-22 21:34:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127891420] [2022-07-22 21:34:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:34,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:34,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:34,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127891420] [2022-07-22 21:34:34,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127891420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:34,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:34,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:34,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659464079] [2022-07-22 21:34:34,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:34,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:34,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:34,311 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 197 [2022-07-22 21:34:34,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 192 transitions, 389 flow. Second operand has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:34,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 197 [2022-07-22 21:34:34,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:34,350 INFO L129 PetriNetUnfolder]: 4/221 cut-off events. [2022-07-22 21:34:34,350 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:34,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 221 events. 4/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 636 event pairs, 0 based on Foata normal form. 40/248 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-07-22 21:34:34,353 INFO L132 encePairwiseOnDemand]: 170/197 looper letters, 1 selfloop transitions, 0 changer transitions 1/163 dead transitions. [2022-07-22 21:34:34,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 163 transitions, 333 flow [2022-07-22 21:34:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 360 transitions. [2022-07-22 21:34:34,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9137055837563451 [2022-07-22 21:34:34,363 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 360 transitions. [2022-07-22 21:34:34,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 360 transitions. [2022-07-22 21:34:34,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:34,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 360 transitions. [2022-07-22 21:34:34,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,375 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,376 INFO L186 Difference]: Start difference. First operand has 165 places, 192 transitions, 389 flow. Second operand 2 states and 360 transitions. [2022-07-22 21:34:34,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 163 transitions, 333 flow [2022-07-22 21:34:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 163 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:34,383 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 329 flow [2022-07-22 21:34:34,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=329, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2022-07-22 21:34:34,386 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -1 predicate places. [2022-07-22 21:34:34,386 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 329 flow [2022-07-22 21:34:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,387 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:34,387 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] [2022-07-22 21:34:34,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:34:34,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1763164273, now seen corresponding path program 1 times [2022-07-22 21:34:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:34,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282510633] [2022-07-22 21:34:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282510633] [2022-07-22 21:34:34,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282510633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:34,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:34,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543630287] [2022-07-22 21:34:34,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:34,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:34,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:34,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-22 21:34:34,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,486 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:34,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-22 21:34:34,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:34,552 INFO L129 PetriNetUnfolder]: 4/224 cut-off events. [2022-07-22 21:34:34,552 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:34,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-07-22 21:34:34,558 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 10 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-22 21:34:34,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 166 transitions, 361 flow [2022-07-22 21:34:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-07-22 21:34:34,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291032148900169 [2022-07-22 21:34:34,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-07-22 21:34:34,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-07-22 21:34:34,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:34,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-07-22 21:34:34,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,575 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 329 flow. Second operand 3 states and 490 transitions. [2022-07-22 21:34:34,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 166 transitions, 361 flow [2022-07-22 21:34:34,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 361 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:34,582 INFO L242 Difference]: Finished difference. Result has 166 places, 163 transitions, 341 flow [2022-07-22 21:34:34,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-07-22 21:34:34,583 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 1 predicate places. [2022-07-22 21:34:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 341 flow [2022-07-22 21:34:34,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:34,584 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] [2022-07-22 21:34:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:34:34,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:34,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2008438335, now seen corresponding path program 1 times [2022-07-22 21:34:34,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:34,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584925657] [2022-07-22 21:34:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:34,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584925657] [2022-07-22 21:34:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584925657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288459221] [2022-07-22 21:34:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:34,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:34,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:34:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:34,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:34,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288459221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:34,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:34,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:34,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972582113] [2022-07-22 21:34:34,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:34,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:34,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:34,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-22 21:34:34,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:34,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-22 21:34:34,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:34,835 INFO L129 PetriNetUnfolder]: 3/170 cut-off events. [2022-07-22 21:34:34,835 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:34,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 170 events. 3/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 188. Up to 6 conditions per place. [2022-07-22 21:34:34,836 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 8 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2022-07-22 21:34:34,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 365 flow [2022-07-22 21:34:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-07-22 21:34:34,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8257191201353637 [2022-07-22 21:34:34,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-07-22 21:34:34,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-07-22 21:34:34,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:34,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-07-22 21:34:34,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,841 INFO L186 Difference]: Start difference. First operand has 166 places, 163 transitions, 341 flow. Second operand 3 states and 488 transitions. [2022-07-22 21:34:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 365 flow [2022-07-22 21:34:34,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:34,844 INFO L242 Difference]: Finished difference. Result has 168 places, 163 transitions, 347 flow [2022-07-22 21:34:34,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2022-07-22 21:34:34,845 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-07-22 21:34:34,845 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 347 flow [2022-07-22 21:34:34,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:34,845 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:34,846 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] [2022-07-22 21:34:34,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:35,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -408777690, now seen corresponding path program 1 times [2022-07-22 21:34:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127520770] [2022-07-22 21:34:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127520770] [2022-07-22 21:34:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127520770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605175689] [2022-07-22 21:34:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:35,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:35,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:35,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:34:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605175689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:35,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:35,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:35,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52275232] [2022-07-22 21:34:35,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:35,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:35,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-22 21:34:35,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:35,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-22 21:34:35,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:35,447 INFO L129 PetriNetUnfolder]: 3/177 cut-off events. [2022-07-22 21:34:35,448 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:34:35,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 177 events. 3/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 209. Up to 6 conditions per place. [2022-07-22 21:34:35,450 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-22 21:34:35,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 173 transitions, 409 flow [2022-07-22 21:34:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-07-22 21:34:35,453 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.81443880428652 [2022-07-22 21:34:35,454 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-07-22 21:34:35,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-07-22 21:34:35,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:35,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-07-22 21:34:35,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,480 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,480 INFO L186 Difference]: Start difference. First operand has 168 places, 163 transitions, 347 flow. Second operand 9 states and 1444 transitions. [2022-07-22 21:34:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 173 transitions, 409 flow [2022-07-22 21:34:35,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:34:35,484 INFO L242 Difference]: Finished difference. Result has 177 places, 169 transitions, 393 flow [2022-07-22 21:34:35,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=177, PETRI_TRANSITIONS=169} [2022-07-22 21:34:35,485 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 12 predicate places. [2022-07-22 21:34:35,485 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 169 transitions, 393 flow [2022-07-22 21:34:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:35,486 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-22 21:34:35,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:35,705 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,SelfDestructingSolverStorable3 [2022-07-22 21:34:35,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash 81295910, now seen corresponding path program 2 times [2022-07-22 21:34:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732432720] [2022-07-22 21:34:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732432720] [2022-07-22 21:34:35,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732432720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674943627] [2022-07-22 21:34:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:35,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:35,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:35,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:34:35,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:35,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:35,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674943627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:35,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:35,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469585251] [2022-07-22 21:34:35,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:35,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-22 21:34:35,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 169 transitions, 393 flow. Second operand has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:35,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:35,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-22 21:34:35,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:36,133 INFO L129 PetriNetUnfolder]: 3/197 cut-off events. [2022-07-22 21:34:36,134 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:34:36,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 197 events. 3/197 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 295. Up to 11 conditions per place. [2022-07-22 21:34:36,135 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 19 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2022-07-22 21:34:36,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 193 transitions, 581 flow [2022-07-22 21:34:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3362 transitions. [2022-07-22 21:34:36,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8126661832245589 [2022-07-22 21:34:36,142 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3362 transitions. [2022-07-22 21:34:36,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3362 transitions. [2022-07-22 21:34:36,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:36,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3362 transitions. [2022-07-22 21:34:36,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0952380952381) internal successors, (3362), 21 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:36,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:36,156 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:36,156 INFO L186 Difference]: Start difference. First operand has 177 places, 169 transitions, 393 flow. Second operand 21 states and 3362 transitions. [2022-07-22 21:34:36,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 193 transitions, 581 flow [2022-07-22 21:34:36,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 567 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:36,160 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 517 flow [2022-07-22 21:34:36,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=517, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2022-07-22 21:34:36,161 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 36 predicate places. [2022-07-22 21:34:36,161 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 517 flow [2022-07-22 21:34:36,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:36,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:36,163 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-22 21:34:36,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:36,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:36,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash 653252134, now seen corresponding path program 3 times [2022-07-22 21:34:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862318006] [2022-07-22 21:34:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:36,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:36,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862318006] [2022-07-22 21:34:36,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862318006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:36,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663640820] [2022-07-22 21:34:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:36,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:36,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:34:36,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:34:36,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:36,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:36,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:34:36,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663640820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:36,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:36,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719676164] [2022-07-22 21:34:36,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:36,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:36,835 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-22 21:34:36,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 517 flow. Second operand has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:36,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:36,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-22 21:34:36,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:37,077 INFO L129 PetriNetUnfolder]: 3/212 cut-off events. [2022-07-22 21:34:37,078 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:34:37,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 212 events. 3/212 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 391. Up to 17 conditions per place. [2022-07-22 21:34:37,079 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 25 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-07-22 21:34:37,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 208 transitions, 773 flow [2022-07-22 21:34:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4798 transitions. [2022-07-22 21:34:37,087 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811844331641286 [2022-07-22 21:34:37,087 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4798 transitions. [2022-07-22 21:34:37,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4798 transitions. [2022-07-22 21:34:37,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:37,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4798 transitions. [2022-07-22 21:34:37,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.93333333333334) internal successors, (4798), 30 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,106 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,106 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 517 flow. Second operand 30 states and 4798 transitions. [2022-07-22 21:34:37,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 208 transitions, 773 flow [2022-07-22 21:34:37,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 208 transitions, 743 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:37,125 INFO L242 Difference]: Finished difference. Result has 228 places, 192 transitions, 645 flow [2022-07-22 21:34:37,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=645, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2022-07-22 21:34:37,127 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 63 predicate places. [2022-07-22 21:34:37,127 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 645 flow [2022-07-22 21:34:37,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,128 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-22 21:34:37,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:37,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:37,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:34:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2059256618, now seen corresponding path program 4 times [2022-07-22 21:34:37,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:37,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602588504] [2022-07-22 21:34:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:37,370 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:37,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:37,436 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:37,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:34:37,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:34:37,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:34:37,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:34:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:34:37,439 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-22 21:34:37,440 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:37,440 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:34:37,455 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:34:37,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-07-22 21:34:37,487 INFO L129 PetriNetUnfolder]: 75/438 cut-off events. [2022-07-22 21:34:37,487 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-22 21:34:37,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1746 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-07-22 21:34:37,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-07-22 21:34:37,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-07-22 21:34:37,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:37,494 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@28491498, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59b8f383 [2022-07-22 21:34:37,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:34:37,499 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-22 21:34:37,499 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:37,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,500 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] [2022-07-22 21:34:37,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -280318449, now seen corresponding path program 1 times [2022-07-22 21:34:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:37,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558564135] [2022-07-22 21:34:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:37,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558564135] [2022-07-22 21:34:37,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558564135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:37,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:37,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364881120] [2022-07-22 21:34:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:37,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 269 [2022-07-22 21:34:37,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 556 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:37,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 269 [2022-07-22 21:34:37,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:37,560 INFO L129 PetriNetUnfolder]: 9/367 cut-off events. [2022-07-22 21:34:37,560 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-22 21:34:37,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 367 events. 9/367 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1431 event pairs, 0 based on Foata normal form. 91/437 useless extension candidates. Maximal degree in co-relation 230. Up to 7 conditions per place. [2022-07-22 21:34:37,563 INFO L132 encePairwiseOnDemand]: 230/269 looper letters, 4 selfloop transitions, 0 changer transitions 1/227 dead transitions. [2022-07-22 21:34:37,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 480 flow [2022-07-22 21:34:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 489 transitions. [2022-07-22 21:34:37,564 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9089219330855018 [2022-07-22 21:34:37,565 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 489 transitions. [2022-07-22 21:34:37,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 489 transitions. [2022-07-22 21:34:37,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:37,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 489 transitions. [2022-07-22 21:34:37,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,567 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,567 INFO L186 Difference]: Start difference. First operand has 229 places, 269 transitions, 556 flow. Second operand 2 states and 489 transitions. [2022-07-22 21:34:37,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 480 flow [2022-07-22 21:34:37,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:37,570 INFO L242 Difference]: Finished difference. Result has 227 places, 226 transitions, 470 flow [2022-07-22 21:34:37,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-07-22 21:34:37,571 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, -2 predicate places. [2022-07-22 21:34:37,571 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 470 flow [2022-07-22 21:34:37,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,572 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,572 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] [2022-07-22 21:34:37,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:34:37,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2106119919, now seen corresponding path program 1 times [2022-07-22 21:34:37,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584028370] [2022-07-22 21:34:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584028370] [2022-07-22 21:34:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584028370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:37,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832487932] [2022-07-22 21:34:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:37,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:37,589 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-22 21:34:37,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:37,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-22 21:34:37,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:37,628 INFO L129 PetriNetUnfolder]: 9/370 cut-off events. [2022-07-22 21:34:37,628 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-22 21:34:37,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 370 events. 9/370 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1428 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 398. Up to 14 conditions per place. [2022-07-22 21:34:37,631 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-07-22 21:34:37,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-07-22 21:34:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-22 21:34:37,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-22 21:34:37,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:37,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 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) [2022-07-22 21:34:37,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,636 INFO L186 Difference]: Start difference. First operand has 227 places, 226 transitions, 470 flow. Second operand 3 states and 664 transitions. [2022-07-22 21:34:37,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-07-22 21:34:37,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:37,639 INFO L242 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-07-22 21:34:37,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-07-22 21:34:37,640 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 0 predicate places. [2022-07-22 21:34:37,640 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-07-22 21:34:37,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,640 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,640 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] [2022-07-22 21:34:37,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:34:37,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash 178238190, now seen corresponding path program 1 times [2022-07-22 21:34:37,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:37,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390858337] [2022-07-22 21:34:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:37,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390858337] [2022-07-22 21:34:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390858337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707011674] [2022-07-22 21:34:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:37,668 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) [2022-07-22 21:34:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:34:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:37,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707011674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:37,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:37,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710921001] [2022-07-22 21:34:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:37,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:37,736 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-22 21:34:37,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:37,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-22 21:34:37,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:37,793 INFO L129 PetriNetUnfolder]: 7/325 cut-off events. [2022-07-22 21:34:37,793 INFO L130 PetriNetUnfolder]: For 15/34 co-relation queries the response was YES. [2022-07-22 21:34:37,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 325 events. 7/325 cut-off events. For 15/34 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1109 event pairs, 0 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2022-07-22 21:34:37,796 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/231 dead transitions. [2022-07-22 21:34:37,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 231 transitions, 520 flow [2022-07-22 21:34:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-22 21:34:37,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-22 21:34:37,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:37,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-22 21:34:37,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 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) [2022-07-22 21:34:37,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,801 INFO L186 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 3 states and 664 transitions. [2022-07-22 21:34:37,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 231 transitions, 520 flow [2022-07-22 21:34:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 231 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:37,804 INFO L242 Difference]: Finished difference. Result has 231 places, 228 transitions, 492 flow [2022-07-22 21:34:37,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=231, PETRI_TRANSITIONS=228} [2022-07-22 21:34:37,805 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 2 predicate places. [2022-07-22 21:34:37,805 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 228 transitions, 492 flow [2022-07-22 21:34:37,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:37,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:37,806 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] [2022-07-22 21:34:37,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:38,022 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,SelfDestructingSolverStorable9 [2022-07-22 21:34:38,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1515379677, now seen corresponding path program 1 times [2022-07-22 21:34:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:38,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413017878] [2022-07-22 21:34:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413017878] [2022-07-22 21:34:38,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413017878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:38,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203202593] [2022-07-22 21:34:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:38,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:38,048 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) [2022-07-22 21:34:38,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:34:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:38,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203202593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:38,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200768176] [2022-07-22 21:34:38,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:38,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-22 21:34:38,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 228 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:38,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-22 21:34:38,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:38,261 INFO L129 PetriNetUnfolder]: 7/332 cut-off events. [2022-07-22 21:34:38,261 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-22 21:34:38,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 332 events. 7/332 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 379. Up to 11 conditions per place. [2022-07-22 21:34:38,264 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 14 selfloop transitions, 9 changer transitions 0/238 dead transitions. [2022-07-22 21:34:38,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 238 transitions, 560 flow [2022-07-22 21:34:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1960 transitions. [2022-07-22 21:34:38,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095828170177612 [2022-07-22 21:34:38,268 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1960 transitions. [2022-07-22 21:34:38,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1960 transitions. [2022-07-22 21:34:38,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:38,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1960 transitions. [2022-07-22 21:34:38,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.77777777777777) internal successors, (1960), 9 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,274 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,274 INFO L186 Difference]: Start difference. First operand has 231 places, 228 transitions, 492 flow. Second operand 9 states and 1960 transitions. [2022-07-22 21:34:38,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 238 transitions, 560 flow [2022-07-22 21:34:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 238 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:38,278 INFO L242 Difference]: Finished difference. Result has 241 places, 234 transitions, 540 flow [2022-07-22 21:34:38,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=241, PETRI_TRANSITIONS=234} [2022-07-22 21:34:38,278 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 12 predicate places. [2022-07-22 21:34:38,278 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 234 transitions, 540 flow [2022-07-22 21:34:38,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,279 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:38,279 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-22 21:34:38,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:38,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:38,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -412502595, now seen corresponding path program 2 times [2022-07-22 21:34:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627728789] [2022-07-22 21:34:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627728789] [2022-07-22 21:34:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627728789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675640842] [2022-07-22 21:34:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:38,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:38,550 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) [2022-07-22 21:34:38,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:34:38,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:38,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675640842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:38,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:38,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981783621] [2022-07-22 21:34:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:38,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:38,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:38,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-22 21:34:38,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 234 transitions, 540 flow. Second operand has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:38,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-22 21:34:38,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:38,885 INFO L129 PetriNetUnfolder]: 7/352 cut-off events. [2022-07-22 21:34:38,885 INFO L130 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2022-07-22 21:34:38,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 352 events. 7/352 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 4/342 useless extension candidates. Maximal degree in co-relation 466. Up to 11 conditions per place. [2022-07-22 21:34:38,888 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 22 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-07-22 21:34:38,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 258 transitions, 734 flow [2022-07-22 21:34:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4562 transitions. [2022-07-22 21:34:38,895 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8075765622234023 [2022-07-22 21:34:38,895 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4562 transitions. [2022-07-22 21:34:38,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4562 transitions. [2022-07-22 21:34:38,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:38,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4562 transitions. [2022-07-22 21:34:38,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 217.23809523809524) internal successors, (4562), 21 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,909 INFO L186 Difference]: Start difference. First operand has 241 places, 234 transitions, 540 flow. Second operand 21 states and 4562 transitions. [2022-07-22 21:34:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 258 transitions, 734 flow [2022-07-22 21:34:38,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 720 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:38,913 INFO L242 Difference]: Finished difference. Result has 265 places, 247 transitions, 664 flow [2022-07-22 21:34:38,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=664, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-07-22 21:34:38,914 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 36 predicate places. [2022-07-22 21:34:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 664 flow [2022-07-22 21:34:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:38,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:38,915 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-22 21:34:38,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:39,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:39,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:39,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2002198147, now seen corresponding path program 3 times [2022-07-22 21:34:39,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:39,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29580633] [2022-07-22 21:34:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:39,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:39,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:39,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29580633] [2022-07-22 21:34:39,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29580633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334857336] [2022-07-22 21:34:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:34:39,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:39,253 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) [2022-07-22 21:34:39,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:34:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:34:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:39,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:34:39,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334857336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:39,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:39,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:39,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5076577] [2022-07-22 21:34:39,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:39,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:39,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:39,503 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-22 21:34:39,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 664 flow. Second operand has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:39,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:39,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-22 21:34:39,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:39,753 INFO L129 PetriNetUnfolder]: 7/367 cut-off events. [2022-07-22 21:34:39,753 INFO L130 PetriNetUnfolder]: For 127/131 co-relation queries the response was YES. [2022-07-22 21:34:39,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 367 events. 7/367 cut-off events. For 127/131 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 562. Up to 17 conditions per place. [2022-07-22 21:34:39,756 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 28 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2022-07-22 21:34:39,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 926 flow [2022-07-22 21:34:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6511 transitions. [2022-07-22 21:34:39,762 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8068153655514251 [2022-07-22 21:34:39,762 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6511 transitions. [2022-07-22 21:34:39,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6511 transitions. [2022-07-22 21:34:39,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:39,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6511 transitions. [2022-07-22 21:34:39,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 217.03333333333333) internal successors, (6511), 30 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:39,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:39,778 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:39,778 INFO L186 Difference]: Start difference. First operand has 265 places, 247 transitions, 664 flow. Second operand 30 states and 6511 transitions. [2022-07-22 21:34:39,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 926 flow [2022-07-22 21:34:39,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 273 transitions, 896 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-22 21:34:39,783 INFO L242 Difference]: Finished difference. Result has 292 places, 257 transitions, 792 flow [2022-07-22 21:34:39,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=792, PETRI_PLACES=292, PETRI_TRANSITIONS=257} [2022-07-22 21:34:39,784 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 63 predicate places. [2022-07-22 21:34:39,784 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 257 transitions, 792 flow [2022-07-22 21:34:39,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:39,785 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:39,785 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-22 21:34:39,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:40,006 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,SelfDestructingSolverStorable12 [2022-07-22 21:34:40,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:34:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1312549664, now seen corresponding path program 4 times [2022-07-22 21:34:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765507472] [2022-07-22 21:34:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:40,026 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:40,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:40,046 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:40,046 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:34:40,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:34:40,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:34:40,046 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:34:40,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:34:40,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:34:40,047 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-22 21:34:40,047 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:40,047 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:34:40,073 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:34:40,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-07-22 21:34:40,129 INFO L129 PetriNetUnfolder]: 110/640 cut-off events. [2022-07-22 21:34:40,129 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-22 21:34:40,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2841 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-07-22 21:34:40,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-07-22 21:34:40,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-07-22 21:34:40,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:40,144 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@28491498, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59b8f383 [2022-07-22 21:34:40,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:34:40,149 INFO L129 PetriNetUnfolder]: 15/139 cut-off events. [2022-07-22 21:34:40,150 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:34:40,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:40,150 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:40,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:40,150 INFO L85 PathProgramCache]: Analyzing trace with hash 936600048, now seen corresponding path program 1 times [2022-07-22 21:34:40,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:40,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504422412] [2022-07-22 21:34:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:40,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504422412] [2022-07-22 21:34:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504422412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:40,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:40,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:34:40,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330278862] [2022-07-22 21:34:40,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:40,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:34:40,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:40,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:34:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:34:40,161 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 341 [2022-07-22 21:34:40,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 341 transitions, 712 flow. Second operand has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:40,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 341 [2022-07-22 21:34:40,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:40,241 INFO L129 PetriNetUnfolder]: 16/539 cut-off events. [2022-07-22 21:34:40,242 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-22 21:34:40,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 539 events. 16/539 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2476 event pairs, 1 based on Foata normal form. 209/717 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2022-07-22 21:34:40,247 INFO L132 encePairwiseOnDemand]: 290/341 looper letters, 6 selfloop transitions, 0 changer transitions 1/286 dead transitions. [2022-07-22 21:34:40,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 286 transitions, 614 flow [2022-07-22 21:34:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:34:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:34:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-07-22 21:34:40,249 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9046920821114369 [2022-07-22 21:34:40,249 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-07-22 21:34:40,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-07-22 21:34:40,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:40,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-07-22 21:34:40,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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) [2022-07-22 21:34:40,251 INFO L81 ComplementDD]: Finished complementDD. Result 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) [2022-07-22 21:34:40,251 INFO L186 Difference]: Start difference. First operand has 289 places, 341 transitions, 712 flow. Second operand 2 states and 617 transitions. [2022-07-22 21:34:40,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 286 transitions, 614 flow [2022-07-22 21:34:40,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 286 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:40,254 INFO L242 Difference]: Finished difference. Result has 286 places, 285 transitions, 600 flow [2022-07-22 21:34:40,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=600, PETRI_PLACES=286, PETRI_TRANSITIONS=285} [2022-07-22 21:34:40,255 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -3 predicate places. [2022-07-22 21:34:40,255 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 285 transitions, 600 flow [2022-07-22 21:34:40,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:40,256 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] [2022-07-22 21:34:40,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:34:40,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1898214065, now seen corresponding path program 1 times [2022-07-22 21:34:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:40,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883566025] [2022-07-22 21:34:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883566025] [2022-07-22 21:34:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883566025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:40,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38808546] [2022-07-22 21:34:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:40,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:40,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-22 21:34:40,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 285 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:40,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-22 21:34:40,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:40,336 INFO L129 PetriNetUnfolder]: 16/542 cut-off events. [2022-07-22 21:34:40,336 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-22 21:34:40,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 542 events. 16/542 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2473 event pairs, 1 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 592. Up to 23 conditions per place. [2022-07-22 21:34:40,342 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-07-22 21:34:40,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 289 transitions, 642 flow [2022-07-22 21:34:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-22 21:34:40,344 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-22 21:34:40,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:40,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 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) [2022-07-22 21:34:40,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,347 INFO L186 Difference]: Start difference. First operand has 286 places, 285 transitions, 600 flow. Second operand 3 states and 837 transitions. [2022-07-22 21:34:40,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 289 transitions, 642 flow [2022-07-22 21:34:40,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 289 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:40,351 INFO L242 Difference]: Finished difference. Result has 288 places, 286 transitions, 612 flow [2022-07-22 21:34:40,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=288, PETRI_TRANSITIONS=286} [2022-07-22 21:34:40,352 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -1 predicate places. [2022-07-22 21:34:40,352 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 286 transitions, 612 flow [2022-07-22 21:34:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:40,352 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] [2022-07-22 21:34:40,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:34:40,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash -163255965, now seen corresponding path program 1 times [2022-07-22 21:34:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:40,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799523182] [2022-07-22 21:34:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799523182] [2022-07-22 21:34:40,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799523182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967200419] [2022-07-22 21:34:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:40,373 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) [2022-07-22 21:34:40,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:34:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 21:34:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:40,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:34:40,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967200419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:40,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:34:40,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 21:34:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964757031] [2022-07-22 21:34:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:40,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:40,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:34:40,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-22 21:34:40,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 286 transitions, 612 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:40,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-22 21:34:40,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:40,565 INFO L129 PetriNetUnfolder]: 14/497 cut-off events. [2022-07-22 21:34:40,566 INFO L130 PetriNetUnfolder]: For 62/152 co-relation queries the response was YES. [2022-07-22 21:34:40,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 497 events. 14/497 cut-off events. For 62/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2138 event pairs, 1 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 560. Up to 30 conditions per place. [2022-07-22 21:34:40,573 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-07-22 21:34:40,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 290 transitions, 654 flow [2022-07-22 21:34:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-22 21:34:40,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-22 21:34:40,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:40,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-22 21:34:40,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 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) [2022-07-22 21:34:40,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,578 INFO L186 Difference]: Start difference. First operand has 288 places, 286 transitions, 612 flow. Second operand 3 states and 837 transitions. [2022-07-22 21:34:40,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 290 transitions, 654 flow [2022-07-22 21:34:40,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 290 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:40,583 INFO L242 Difference]: Finished difference. Result has 290 places, 287 transitions, 622 flow [2022-07-22 21:34:40,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=290, PETRI_TRANSITIONS=287} [2022-07-22 21:34:40,584 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2022-07-22 21:34:40,584 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 287 transitions, 622 flow [2022-07-22 21:34:40,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,585 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:40,585 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] [2022-07-22 21:34:40,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:40,803 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,SelfDestructingSolverStorable16 [2022-07-22 21:34:40,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash -522046394, now seen corresponding path program 1 times [2022-07-22 21:34:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275349366] [2022-07-22 21:34:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:40,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:40,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275349366] [2022-07-22 21:34:40,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275349366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114299453] [2022-07-22 21:34:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:40,825 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) [2022-07-22 21:34:40,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:34:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:40,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:40,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114299453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:40,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:40,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:40,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802137454] [2022-07-22 21:34:40,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:40,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:40,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:40,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-22 21:34:40,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 287 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:40,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:40,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-22 21:34:40,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:41,060 INFO L129 PetriNetUnfolder]: 14/504 cut-off events. [2022-07-22 21:34:41,060 INFO L130 PetriNetUnfolder]: For 54/69 co-relation queries the response was YES. [2022-07-22 21:34:41,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 504 events. 14/504 cut-off events. For 54/69 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2133 event pairs, 1 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 575. Up to 20 conditions per place. [2022-07-22 21:34:41,069 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 16 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-22 21:34:41,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 694 flow [2022-07-22 21:34:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2475 transitions. [2022-07-22 21:34:41,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-22 21:34:41,072 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2475 transitions. [2022-07-22 21:34:41,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2475 transitions. [2022-07-22 21:34:41,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:41,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2475 transitions. [2022-07-22 21:34:41,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.0) internal successors, (2475), 9 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,078 INFO L186 Difference]: Start difference. First operand has 290 places, 287 transitions, 622 flow. Second operand 9 states and 2475 transitions. [2022-07-22 21:34:41,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 694 flow [2022-07-22 21:34:41,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 297 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:41,095 INFO L242 Difference]: Finished difference. Result has 300 places, 293 transitions, 670 flow [2022-07-22 21:34:41,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2022-07-22 21:34:41,096 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 11 predicate places. [2022-07-22 21:34:41,096 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 670 flow [2022-07-22 21:34:41,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,097 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:41,097 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:41,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:41,319 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,SelfDestructingSolverStorable17 [2022-07-22 21:34:41,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2078839546, now seen corresponding path program 2 times [2022-07-22 21:34:41,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:41,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812696244] [2022-07-22 21:34:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 21:34:41,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812696244] [2022-07-22 21:34:41,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812696244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:41,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242608357] [2022-07-22 21:34:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:34:41,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:41,360 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) [2022-07-22 21:34:41,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:34:41,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:34:41,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:34:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:34:41,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242608357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:41,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:41,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-22 21:34:41,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283569910] [2022-07-22 21:34:41,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:34:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:34:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:34:41,562 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 341 [2022-07-22 21:34:41,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:41,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 341 [2022-07-22 21:34:41,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:41,795 INFO L129 PetriNetUnfolder]: 12/479 cut-off events. [2022-07-22 21:34:41,796 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-22 21:34:41,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 479 events. 12/479 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1720 event pairs, 2 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 636. Up to 29 conditions per place. [2022-07-22 21:34:41,802 INFO L132 encePairwiseOnDemand]: 330/341 looper letters, 35 selfloop transitions, 26 changer transitions 0/325 dead transitions. [2022-07-22 21:34:41,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 325 transitions, 918 flow [2022-07-22 21:34:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 21:34:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-22 21:34:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6691 transitions. [2022-07-22 21:34:41,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7848680351906159 [2022-07-22 21:34:41,806 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6691 transitions. [2022-07-22 21:34:41,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6691 transitions. [2022-07-22 21:34:41,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:41,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6691 transitions. [2022-07-22 21:34:41,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 267.64) internal successors, (6691), 25 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,820 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,820 INFO L186 Difference]: Start difference. First operand has 300 places, 293 transitions, 670 flow. Second operand 25 states and 6691 transitions. [2022-07-22 21:34:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 325 transitions, 918 flow [2022-07-22 21:34:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 325 transitions, 904 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:41,845 INFO L242 Difference]: Finished difference. Result has 331 places, 309 transitions, 828 flow [2022-07-22 21:34:41,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=828, PETRI_PLACES=331, PETRI_TRANSITIONS=309} [2022-07-22 21:34:41,846 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 42 predicate places. [2022-07-22 21:34:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 309 transitions, 828 flow [2022-07-22 21:34:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:41,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:41,847 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2022-07-22 21:34:41,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:42,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:42,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash -497132495, now seen corresponding path program 1 times [2022-07-22 21:34:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777693073] [2022-07-22 21:34:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:42,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:42,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777693073] [2022-07-22 21:34:42,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777693073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:42,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834973719] [2022-07-22 21:34:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:42,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:42,233 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) [2022-07-22 21:34:42,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:34:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:42,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834973719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:42,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-22 21:34:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764583557] [2022-07-22 21:34:42,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 21:34:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 21:34:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:34:42,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-22 21:34:42,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 309 transitions, 828 flow. Second operand has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:42,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:42,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-22 21:34:42,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:42,823 INFO L129 PetriNetUnfolder]: 12/494 cut-off events. [2022-07-22 21:34:42,823 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-22 21:34:42,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 494 events. 12/494 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1721 event pairs, 2 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 728. Up to 20 conditions per place. [2022-07-22 21:34:42,830 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 30 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2022-07-22 21:34:42,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 335 transitions, 1094 flow [2022-07-22 21:34:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:34:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:34:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8223 transitions. [2022-07-22 21:34:42,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038123167155425 [2022-07-22 21:34:42,835 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8223 transitions. [2022-07-22 21:34:42,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8223 transitions. [2022-07-22 21:34:42,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:42,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8223 transitions. [2022-07-22 21:34:42,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 274.1) internal successors, (8223), 30 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:42,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:42,855 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:42,855 INFO L186 Difference]: Start difference. First operand has 331 places, 309 transitions, 828 flow. Second operand 30 states and 8223 transitions. [2022-07-22 21:34:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 335 transitions, 1094 flow [2022-07-22 21:34:42,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 335 transitions, 1060 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-22 21:34:42,860 INFO L242 Difference]: Finished difference. Result has 357 places, 319 transitions, 952 flow [2022-07-22 21:34:42,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=952, PETRI_PLACES=357, PETRI_TRANSITIONS=319} [2022-07-22 21:34:42,861 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 68 predicate places. [2022-07-22 21:34:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 319 transitions, 952 flow [2022-07-22 21:34:42,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:42,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:42,863 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:42,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:43,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:43,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:34:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash 28146467, now seen corresponding path program 2 times [2022-07-22 21:34:43,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:43,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745081831] [2022-07-22 21:34:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-22 21:34:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745081831] [2022-07-22 21:34:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745081831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:43,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:43,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 21:34:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501105422] [2022-07-22 21:34:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:34:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:34:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:34:43,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 341 [2022-07-22 21:34:43,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 319 transitions, 952 flow. Second operand has 13 states, 13 states have (on average 203.23076923076923) internal successors, (2642), 13 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:43,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:43,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 341 [2022-07-22 21:34:43,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand