./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.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/pthread-ext/12_fmaxsymopt_cas.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 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:17:49,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:17:49,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:17:49,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:17:49,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:17:49,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:17:49,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:17:49,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:17:49,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:17:49,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:17:49,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:17:49,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:17:49,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:17:49,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:17:49,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:17:49,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:17:49,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:17:49,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:17:49,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:17:49,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:17:49,557 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:17:49,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:17:49,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:17:49,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:17:49,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:17:49,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:17:49,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:17:49,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:17:49,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:17:49,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:17:49,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:17:49,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:17:49,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:17:49,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:17:49,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:17:49,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:17:49,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:17:49,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:17:49,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:17:49,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:17:49,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:17:49,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:17:49,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:17:49,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:17:49,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:17:49,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:17:49,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:17:49,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:17:49,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:17:49,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:17:49,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:17:49,604 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:17:49,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:17:49,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:17:49,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:17:49,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:17:49,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:17:49,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:17:49,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:17:49,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:17:49,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:17:49,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:17:49,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:17:49,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:17:49,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:17:49,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:17:49,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:17:49,609 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:17:49,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:17:49,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:17:49,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb [2022-07-22 21:17:49,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:17:49,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:17:49,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:17:49,832 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:17:49,832 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:17:49,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-22 21:17:49,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5527f8c/1b011f160c944c7bacc723b63d0738b2/FLAG9af4fbeec [2022-07-22 21:17:50,299 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:17:50,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-22 21:17:50,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5527f8c/1b011f160c944c7bacc723b63d0738b2/FLAG9af4fbeec [2022-07-22 21:17:50,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5527f8c/1b011f160c944c7bacc723b63d0738b2 [2022-07-22 21:17:50,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:17:50,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:17:50,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:17:50,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:17:50,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:17:50,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8c10cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50, skipping insertion in model container [2022-07-22 21:17:50,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:17:50,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:17:50,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-22 21:17:50,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:17:50,697 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:17:50,732 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-22 21:17:50,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:17:50,763 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:17:50,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50 WrapperNode [2022-07-22 21:17:50,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:17:50,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:17:50,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:17:50,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:17:50,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,818 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2022-07-22 21:17:50,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:17:50,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:17:50,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:17:50,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:17:50,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:17:50,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:17:50,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:17:50,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:17:50,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (1/1) ... [2022-07-22 21:17:50,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:17:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:17:50,897 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 21:17:50,918 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 21:17:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:17:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:17:50,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:17:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:17:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:17:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:17:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:17:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:17:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:17:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:17:50,940 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 21:17:51,068 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:17:51,074 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:17:51,225 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:17:51,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:17:51,267 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:17:51,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:17:51 BoogieIcfgContainer [2022-07-22 21:17:51,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:17:51,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:17:51,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:17:51,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:17:51,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:17:50" (1/3) ... [2022-07-22 21:17:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b072b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:17:51, skipping insertion in model container [2022-07-22 21:17:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:17:50" (2/3) ... [2022-07-22 21:17:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b072b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:17:51, skipping insertion in model container [2022-07-22 21:17:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:17:51" (3/3) ... [2022-07-22 21:17:51,286 INFO L111 eAbstractionObserver]: Analyzing ICFG 12_fmaxsymopt_cas.i [2022-07-22 21:17:51,292 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:17:51,301 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:17:51,301 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:17:51,301 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:17:51,369 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:51,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 102 transitions, 209 flow [2022-07-22 21:17:51,483 INFO L129 PetriNetUnfolder]: 12/113 cut-off events. [2022-07-22 21:17:51,483 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:17:51,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 12/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-07-22 21:17:51,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 102 transitions, 209 flow [2022-07-22 21:17:51,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 102 transitions, 209 flow [2022-07-22 21:17:51,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:51,511 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:17:51,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:17:51,525 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-22 21:17:51,526 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:17:51,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:51,527 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:51,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:17:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1635953085, now seen corresponding path program 1 times [2022-07-22 21:17:51,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614456045] [2022-07-22 21:17:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:51,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:51,659 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:51,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:51,720 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:51,722 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:17:51,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:17:51,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:17:51,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:17:51,725 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:51,728 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:51,728 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:17:51,784 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:51,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 166 transitions, 344 flow [2022-07-22 21:17:51,842 INFO L129 PetriNetUnfolder]: 23/190 cut-off events. [2022-07-22 21:17:51,842 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:17:51,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 190 events. 23/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 408 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2022-07-22 21:17:51,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 166 transitions, 344 flow [2022-07-22 21:17:51,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 166 transitions, 344 flow [2022-07-22 21:17:51,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:51,856 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:17:51,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:17:51,879 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-07-22 21:17:51,879 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:17:51,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:51,879 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:51,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:17:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -32075274, now seen corresponding path program 1 times [2022-07-22 21:17:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143281845] [2022-07-22 21:17:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:51,905 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:51,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:51,920 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:51,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:17:51,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:17:51,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:17:51,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:17:51,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:17:51,922 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:51,922 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:51,922 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:17:51,967 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:51,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 230 transitions, 481 flow [2022-07-22 21:17:52,005 INFO L129 PetriNetUnfolder]: 34/267 cut-off events. [2022-07-22 21:17:52,005 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:17:52,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 34/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 750 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 202. Up to 8 conditions per place. [2022-07-22 21:17:52,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 230 transitions, 481 flow [2022-07-22 21:17:52,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 230 transitions, 481 flow [2022-07-22 21:17:52,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:52,019 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:17:52,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:17:52,031 INFO L129 PetriNetUnfolder]: 8/125 cut-off events. [2022-07-22 21:17:52,032 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:17:52,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:52,032 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:52,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:17:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1459620510, now seen corresponding path program 1 times [2022-07-22 21:17:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016291236] [2022-07-22 21:17:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:52,071 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:52,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:52,104 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:52,105 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:17:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:17:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:17:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:17:52,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:17:52,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:17:52,105 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:17:52,106 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:52,106 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:17:52,153 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:52,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 262 places, 294 transitions, 620 flow [2022-07-22 21:17:52,208 INFO L129 PetriNetUnfolder]: 45/344 cut-off events. [2022-07-22 21:17:52,208 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:17:52,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 344 events. 45/344 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1120 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 275. Up to 10 conditions per place. [2022-07-22 21:17:52,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 294 transitions, 620 flow [2022-07-22 21:17:52,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 294 transitions, 620 flow [2022-07-22 21:17:52,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:52,219 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:17:52,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:17:52,237 INFO L129 PetriNetUnfolder]: 14/175 cut-off events. [2022-07-22 21:17:52,237 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:17:52,237 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:52,237 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 21:17:52,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:17:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 688159959, now seen corresponding path program 1 times [2022-07-22 21:17:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733951608] [2022-07-22 21:17:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:52,321 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 21:17:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:52,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733951608] [2022-07-22 21:17:52,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733951608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:52,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:52,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:17:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780987192] [2022-07-22 21:17:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:52,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:17:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:17:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:17:52,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 294 [2022-07-22 21:17:52,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 294 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:52,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:52,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 294 [2022-07-22 21:17:52,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:52,576 INFO L129 PetriNetUnfolder]: 109/1030 cut-off events. [2022-07-22 21:17:52,577 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-22 21:17:52,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1030 events. 109/1030 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 34 based on Foata normal form. 188/1102 useless extension candidates. Maximal degree in co-relation 539. Up to 65 conditions per place. [2022-07-22 21:17:52,596 INFO L132 encePairwiseOnDemand]: 272/294 looper letters, 8 selfloop transitions, 0 changer transitions 0/263 dead transitions. [2022-07-22 21:17:52,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 263 transitions, 574 flow [2022-07-22 21:17:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:17:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:17:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 550 transitions. [2022-07-22 21:17:52,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.935374149659864 [2022-07-22 21:17:52,612 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 550 transitions. [2022-07-22 21:17:52,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 550 transitions. [2022-07-22 21:17:52,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:52,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 550 transitions. [2022-07-22 21:17:52,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 275.0) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 21:17:52,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:17:52,626 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 21:17:52,628 INFO L186 Difference]: Start difference. First operand has 262 places, 294 transitions, 620 flow. Second operand 2 states and 550 transitions. [2022-07-22 21:17:52,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 263 transitions, 574 flow [2022-07-22 21:17:52,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 263 transitions, 562 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:17:52,640 INFO L242 Difference]: Finished difference. Result has 253 places, 263 transitions, 546 flow [2022-07-22 21:17:52,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=546, PETRI_PLACES=253, PETRI_TRANSITIONS=263} [2022-07-22 21:17:52,645 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -9 predicate places. [2022-07-22 21:17:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 263 transitions, 546 flow [2022-07-22 21:17:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:52,646 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:52,646 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:17:52,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:17:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 833454973, now seen corresponding path program 1 times [2022-07-22 21:17:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:52,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702281699] [2022-07-22 21:17:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:52,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:52,709 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 21:17:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:52,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702281699] [2022-07-22 21:17:52,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702281699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:52,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:52,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708186662] [2022-07-22 21:17:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:52,714 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 294 [2022-07-22 21:17:52,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 263 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 21:17:52,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:52,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 294 [2022-07-22 21:17:52,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:53,344 INFO L129 PetriNetUnfolder]: 687/3642 cut-off events. [2022-07-22 21:17:53,345 INFO L130 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-07-22 21:17:53,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4781 conditions, 3642 events. 687/3642 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 32395 event pairs, 250 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 4774. Up to 439 conditions per place. [2022-07-22 21:17:53,410 INFO L132 encePairwiseOnDemand]: 290/294 looper letters, 29 selfloop transitions, 3 changer transitions 0/274 dead transitions. [2022-07-22 21:17:53,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 274 transitions, 647 flow [2022-07-22 21:17:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:17:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:17:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2022-07-22 21:17:53,413 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8775510204081632 [2022-07-22 21:17:53,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2022-07-22 21:17:53,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2022-07-22 21:17:53,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:53,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2022-07-22 21:17:53,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 21:17:53,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:17:53,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:17:53,418 INFO L186 Difference]: Start difference. First operand has 253 places, 263 transitions, 546 flow. Second operand 3 states and 774 transitions. [2022-07-22 21:17:53,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 274 transitions, 647 flow [2022-07-22 21:17:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 274 transitions, 647 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:17:53,428 INFO L242 Difference]: Finished difference. Result has 256 places, 263 transitions, 557 flow [2022-07-22 21:17:53,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=557, PETRI_PLACES=256, PETRI_TRANSITIONS=263} [2022-07-22 21:17:53,430 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -6 predicate places. [2022-07-22 21:17:53,430 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 263 transitions, 557 flow [2022-07-22 21:17:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 21:17:53,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:53,431 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:17:53,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:17:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash 908884319, now seen corresponding path program 1 times [2022-07-22 21:17:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:53,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722525189] [2022-07-22 21:17:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:53,472 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:53,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:53,497 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:53,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:17:53,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:17:53,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:17:53,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:17:53,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:17:53,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:17:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:17:53,504 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:17:53,505 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:53,505 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:17:53,593 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:53,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 318 places, 358 transitions, 761 flow [2022-07-22 21:17:53,661 INFO L129 PetriNetUnfolder]: 56/421 cut-off events. [2022-07-22 21:17:53,662 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:17:53,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 421 events. 56/421 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1511 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 357. Up to 12 conditions per place. [2022-07-22 21:17:53,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 358 transitions, 761 flow [2022-07-22 21:17:53,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 358 transitions, 761 flow [2022-07-22 21:17:53,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:17:53,681 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:17:53,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:17:53,693 INFO L129 PetriNetUnfolder]: 14/170 cut-off events. [2022-07-22 21:17:53,693 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:17:53,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:53,694 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 21:17:53,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -492306787, now seen corresponding path program 1 times [2022-07-22 21:17:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025041580] [2022-07-22 21:17:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:53,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:53,733 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 21:17:53,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025041580] [2022-07-22 21:17:53,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025041580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:53,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:53,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:17:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589118150] [2022-07-22 21:17:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:17:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:17:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:17:53,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 358 [2022-07-22 21:17:53,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 761 flow. Second operand has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 21:17:53,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:53,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 358 [2022-07-22 21:17:53,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:54,131 INFO L129 PetriNetUnfolder]: 253/2126 cut-off events. [2022-07-22 21:17:54,132 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-22 21:17:54,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 2126 events. 253/2126 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 15367 event pairs, 98 based on Foata normal form. 492/2376 useless extension candidates. Maximal degree in co-relation 1191. Up to 161 conditions per place. [2022-07-22 21:17:54,172 INFO L132 encePairwiseOnDemand]: 331/358 looper letters, 10 selfloop transitions, 0 changer transitions 0/321 dead transitions. [2022-07-22 21:17:54,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 321 transitions, 707 flow [2022-07-22 21:17:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:17:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:17:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2022-07-22 21:17:54,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9343575418994413 [2022-07-22 21:17:54,174 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2022-07-22 21:17:54,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2022-07-22 21:17:54,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:54,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2022-07-22 21:17:54,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 21:17:54,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 21:17:54,177 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 21:17:54,178 INFO L186 Difference]: Start difference. First operand has 318 places, 358 transitions, 761 flow. Second operand 2 states and 669 transitions. [2022-07-22 21:17:54,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 321 transitions, 707 flow [2022-07-22 21:17:54,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 321 transitions, 687 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-22 21:17:54,184 INFO L242 Difference]: Finished difference. Result has 308 places, 321 transitions, 667 flow [2022-07-22 21:17:54,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=667, PETRI_PLACES=308, PETRI_TRANSITIONS=321} [2022-07-22 21:17:54,185 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -10 predicate places. [2022-07-22 21:17:54,185 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 321 transitions, 667 flow [2022-07-22 21:17:54,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 21:17:54,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:54,186 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:54,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:17:54,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1429904641, now seen corresponding path program 1 times [2022-07-22 21:17:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647246405] [2022-07-22 21:17:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:54,218 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 21:17:54,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:54,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647246405] [2022-07-22 21:17:54,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647246405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:54,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:54,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718681308] [2022-07-22 21:17:54,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:54,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:54,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-22 21:17:54,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 321 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 21:17:54,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:54,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-22 21:17:54,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:55,945 INFO L129 PetriNetUnfolder]: 1833/9586 cut-off events. [2022-07-22 21:17:55,945 INFO L130 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2022-07-22 21:17:56,074 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12242 conditions, 9586 events. 1833/9586 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 104876 event pairs, 674 based on Foata normal form. 0/8263 useless extension candidates. Maximal degree in co-relation 12234. Up to 1071 conditions per place. [2022-07-22 21:17:56,148 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 33 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-22 21:17:56,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 334 transitions, 785 flow [2022-07-22 21:17:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:17:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:17:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 946 transitions. [2022-07-22 21:17:56,151 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8808193668528864 [2022-07-22 21:17:56,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 946 transitions. [2022-07-22 21:17:56,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 946 transitions. [2022-07-22 21:17:56,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:56,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 946 transitions. [2022-07-22 21:17:56,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 21:17:56,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:56,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:56,155 INFO L186 Difference]: Start difference. First operand has 308 places, 321 transitions, 667 flow. Second operand 3 states and 946 transitions. [2022-07-22 21:17:56,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 334 transitions, 785 flow [2022-07-22 21:17:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 334 transitions, 785 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:17:56,160 INFO L242 Difference]: Finished difference. Result has 311 places, 321 transitions, 678 flow [2022-07-22 21:17:56,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=678, PETRI_PLACES=311, PETRI_TRANSITIONS=321} [2022-07-22 21:17:56,161 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -7 predicate places. [2022-07-22 21:17:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 321 transitions, 678 flow [2022-07-22 21:17:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 21:17:56,162 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:56,162 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:56,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:17:56,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1487906071, now seen corresponding path program 1 times [2022-07-22 21:17:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365489119] [2022-07-22 21:17:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:56,187 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 21:17:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365489119] [2022-07-22 21:17:56,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365489119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:56,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:56,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:56,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045673138] [2022-07-22 21:17:56,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:56,190 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 358 [2022-07-22 21:17:56,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 321 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states 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 21:17:56,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:56,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 358 [2022-07-22 21:17:56,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:57,568 INFO L129 PetriNetUnfolder]: 1379/7043 cut-off events. [2022-07-22 21:17:57,568 INFO L130 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2022-07-22 21:17:57,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 7043 events. 1379/7043 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 72084 event pairs, 610 based on Foata normal form. 0/6177 useless extension candidates. Maximal degree in co-relation 9275. Up to 952 conditions per place. [2022-07-22 21:17:57,718 INFO L132 encePairwiseOnDemand]: 355/358 looper letters, 29 selfloop transitions, 2 changer transitions 0/333 dead transitions. [2022-07-22 21:17:57,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 333 transitions, 784 flow [2022-07-22 21:17:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:17:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:17:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-07-22 21:17:57,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8873370577281192 [2022-07-22 21:17:57,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-07-22 21:17:57,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-07-22 21:17:57,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:57,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-07-22 21:17:57,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states 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 21:17:57,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:57,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:57,725 INFO L186 Difference]: Start difference. First operand has 311 places, 321 transitions, 678 flow. Second operand 3 states and 953 transitions. [2022-07-22 21:17:57,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 333 transitions, 784 flow [2022-07-22 21:17:57,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 333 transitions, 781 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:17:57,731 INFO L242 Difference]: Finished difference. Result has 313 places, 322 transitions, 687 flow [2022-07-22 21:17:57,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=313, PETRI_TRANSITIONS=322} [2022-07-22 21:17:57,733 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-07-22 21:17:57,733 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 322 transitions, 687 flow [2022-07-22 21:17:57,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states 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 21:17:57,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:57,734 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:17:57,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1969543966, now seen corresponding path program 1 times [2022-07-22 21:17:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104860010] [2022-07-22 21:17:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:17:57,756 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 21:17:57,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:57,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104860010] [2022-07-22 21:17:57,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104860010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:17:57,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:17:57,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:17:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545347005] [2022-07-22 21:17:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:17:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:17:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:17:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:17:57,759 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-22 21:17:57,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 322 transitions, 687 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 21:17:57,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:57,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-22 21:17:57,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:59,593 INFO L129 PetriNetUnfolder]: 1847/9295 cut-off events. [2022-07-22 21:17:59,593 INFO L130 PetriNetUnfolder]: For 764/764 co-relation queries the response was YES. [2022-07-22 21:17:59,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 9295 events. 1847/9295 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 98815 event pairs, 755 based on Foata normal form. 0/8015 useless extension candidates. Maximal degree in co-relation 11977. Up to 1044 conditions per place. [2022-07-22 21:17:59,817 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 32 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-22 21:17:59,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 334 transitions, 796 flow [2022-07-22 21:17:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:17:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:17:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 945 transitions. [2022-07-22 21:17:59,820 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798882681564246 [2022-07-22 21:17:59,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 945 transitions. [2022-07-22 21:17:59,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 945 transitions. [2022-07-22 21:17:59,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:17:59,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 945 transitions. [2022-07-22 21:17:59,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 21:17:59,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:59,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states 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 21:17:59,825 INFO L186 Difference]: Start difference. First operand has 313 places, 322 transitions, 687 flow. Second operand 3 states and 945 transitions. [2022-07-22 21:17:59,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 334 transitions, 796 flow [2022-07-22 21:17:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 334 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:17:59,830 INFO L242 Difference]: Finished difference. Result has 315 places, 322 transitions, 696 flow [2022-07-22 21:17:59,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=696, PETRI_PLACES=315, PETRI_TRANSITIONS=322} [2022-07-22 21:17:59,830 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -3 predicate places. [2022-07-22 21:17:59,831 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 322 transitions, 696 flow [2022-07-22 21:17:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 21:17:59,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:17:59,832 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:17:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:17:59,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:17:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:17:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2049506815, now seen corresponding path program 1 times [2022-07-22 21:17:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:17:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499251135] [2022-07-22 21:17:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:17:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:17:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:59,848 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:17:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:17:59,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:17:59,881 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:17:59,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-22 21:17:59,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-22 21:17:59,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-22 21:17:59,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-22 21:17:59,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-22 21:17:59,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-22 21:17:59,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-22 21:17:59,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:17:59,882 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:17:59,883 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:17:59,883 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:17:59,931 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:17:59,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 374 places, 422 transitions, 904 flow [2022-07-22 21:18:00,013 INFO L129 PetriNetUnfolder]: 67/498 cut-off events. [2022-07-22 21:18:00,013 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:18:00,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 67/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1888 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 440. Up to 14 conditions per place. [2022-07-22 21:18:00,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 422 transitions, 904 flow [2022-07-22 21:18:00,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 422 transitions, 904 flow [2022-07-22 21:18:00,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:00,037 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:18:00,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-22 21:18:00,047 INFO L129 PetriNetUnfolder]: 13/168 cut-off events. [2022-07-22 21:18:00,048 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:18:00,048 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:00,048 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 21:18:00,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash 503615203, now seen corresponding path program 1 times [2022-07-22 21:18:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190654238] [2022-07-22 21:18:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:00,082 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 21:18:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:00,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190654238] [2022-07-22 21:18:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190654238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:00,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:18:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245954261] [2022-07-22 21:18:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:18:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:18:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:18:00,086 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 422 [2022-07-22 21:18:00,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states 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 21:18:00,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:00,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 422 [2022-07-22 21:18:00,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:00,983 INFO L129 PetriNetUnfolder]: 573/4350 cut-off events. [2022-07-22 21:18:00,983 INFO L130 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-07-22 21:18:01,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 4350 events. 573/4350 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 38090 event pairs, 258 based on Foata normal form. 1228/5084 useless extension candidates. Maximal degree in co-relation 2551. Up to 385 conditions per place. [2022-07-22 21:18:01,133 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 12 selfloop transitions, 0 changer transitions 0/379 dead transitions. [2022-07-22 21:18:01,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 379 transitions, 842 flow [2022-07-22 21:18:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:18:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:18:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 788 transitions. [2022-07-22 21:18:01,135 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.933649289099526 [2022-07-22 21:18:01,135 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 788 transitions. [2022-07-22 21:18:01,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 788 transitions. [2022-07-22 21:18:01,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:01,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 788 transitions. [2022-07-22 21:18:01,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.0) internal successors, (788), 2 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 21:18:01,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 21:18:01,140 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states 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 21:18:01,140 INFO L186 Difference]: Start difference. First operand has 374 places, 422 transitions, 904 flow. Second operand 2 states and 788 transitions. [2022-07-22 21:18:01,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 379 transitions, 842 flow [2022-07-22 21:18:01,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 379 transitions, 812 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:01,146 INFO L242 Difference]: Finished difference. Result has 363 places, 379 transitions, 788 flow [2022-07-22 21:18:01,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=788, PETRI_PLACES=363, PETRI_TRANSITIONS=379} [2022-07-22 21:18:01,148 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -11 predicate places. [2022-07-22 21:18:01,148 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 379 transitions, 788 flow [2022-07-22 21:18:01,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states 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 21:18:01,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:01,148 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:01,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:18:01,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash 266410080, now seen corresponding path program 1 times [2022-07-22 21:18:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:01,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995214800] [2022-07-22 21:18:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:01,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:01,175 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 21:18:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995214800] [2022-07-22 21:18:01,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995214800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:01,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:01,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699222441] [2022-07-22 21:18:01,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:01,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:01,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-22 21:18:01,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 379 transitions, 788 flow. Second operand has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 21:18:01,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:01,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-22 21:18:01,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:05,966 INFO L129 PetriNetUnfolder]: 4491/22742 cut-off events. [2022-07-22 21:18:05,966 INFO L130 PetriNetUnfolder]: For 1675/1675 co-relation queries the response was YES. [2022-07-22 21:18:06,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 22742 events. 4491/22742 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 287776 event pairs, 1698 based on Foata normal form. 0/19731 useless extension candidates. Maximal degree in co-relation 28710. Up to 2511 conditions per place. [2022-07-22 21:18:06,699 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 37 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-22 21:18:06,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 394 transitions, 923 flow [2022-07-22 21:18:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1118 transitions. [2022-07-22 21:18:06,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8830963665086888 [2022-07-22 21:18:06,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1118 transitions. [2022-07-22 21:18:06,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1118 transitions. [2022-07-22 21:18:06,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:06,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1118 transitions. [2022-07-22 21:18:06,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.6666666666667) internal successors, (1118), 3 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 21:18:06,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:06,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:06,706 INFO L186 Difference]: Start difference. First operand has 363 places, 379 transitions, 788 flow. Second operand 3 states and 1118 transitions. [2022-07-22 21:18:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 394 transitions, 923 flow [2022-07-22 21:18:06,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 923 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:06,712 INFO L242 Difference]: Finished difference. Result has 366 places, 379 transitions, 799 flow [2022-07-22 21:18:06,712 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=799, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2022-07-22 21:18:06,713 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -8 predicate places. [2022-07-22 21:18:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 799 flow [2022-07-22 21:18:06,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states 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 21:18:06,713 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:06,714 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:06,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:18:06,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1160838450, now seen corresponding path program 1 times [2022-07-22 21:18:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:06,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960652264] [2022-07-22 21:18:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:06,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:06,735 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 21:18:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960652264] [2022-07-22 21:18:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960652264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:06,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:06,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798073488] [2022-07-22 21:18:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:06,738 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-22 21:18:06,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 799 flow. Second operand has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 21:18:06,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:06,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-22 21:18:06,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:10,528 INFO L129 PetriNetUnfolder]: 3439/17495 cut-off events. [2022-07-22 21:18:10,528 INFO L130 PetriNetUnfolder]: For 1523/1523 co-relation queries the response was YES. [2022-07-22 21:18:10,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22442 conditions, 17495 events. 3439/17495 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 210472 event pairs, 1538 based on Foata normal form. 0/15417 useless extension candidates. Maximal degree in co-relation 22431. Up to 2232 conditions per place. [2022-07-22 21:18:10,956 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 33 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-22 21:18:10,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 393 transitions, 922 flow [2022-07-22 21:18:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1125 transitions. [2022-07-22 21:18:10,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8886255924170616 [2022-07-22 21:18:10,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1125 transitions. [2022-07-22 21:18:10,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1125 transitions. [2022-07-22 21:18:10,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:10,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1125 transitions. [2022-07-22 21:18:10,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states 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 21:18:10,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:10,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:10,964 INFO L186 Difference]: Start difference. First operand has 366 places, 379 transitions, 799 flow. Second operand 3 states and 1125 transitions. [2022-07-22 21:18:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 393 transitions, 922 flow [2022-07-22 21:18:10,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 393 transitions, 919 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:10,972 INFO L242 Difference]: Finished difference. Result has 368 places, 380 transitions, 808 flow [2022-07-22 21:18:10,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=808, PETRI_PLACES=368, PETRI_TRANSITIONS=380} [2022-07-22 21:18:10,973 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -6 predicate places. [2022-07-22 21:18:10,974 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 380 transitions, 808 flow [2022-07-22 21:18:10,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 21:18:10,974 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:10,974 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:18:10,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1848432253, now seen corresponding path program 1 times [2022-07-22 21:18:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649375236] [2022-07-22 21:18:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:10,995 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 21:18:10,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649375236] [2022-07-22 21:18:10,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649375236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:10,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:10,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718668792] [2022-07-22 21:18:10,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:10,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-22 21:18:11,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 380 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 21:18:11,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:11,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-22 21:18:11,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,592 INFO L129 PetriNetUnfolder]: 4229/19775 cut-off events. [2022-07-22 21:18:15,592 INFO L130 PetriNetUnfolder]: For 1628/1628 co-relation queries the response was YES. [2022-07-22 21:18:15,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25658 conditions, 19775 events. 4229/19775 cut-off events. For 1628/1628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 242336 event pairs, 1689 based on Foata normal form. 0/17105 useless extension candidates. Maximal degree in co-relation 25646. Up to 2484 conditions per place. [2022-07-22 21:18:16,137 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 36 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-22 21:18:16,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 394 transitions, 934 flow [2022-07-22 21:18:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1117 transitions. [2022-07-22 21:18:16,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882306477093207 [2022-07-22 21:18:16,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1117 transitions. [2022-07-22 21:18:16,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1117 transitions. [2022-07-22 21:18:16,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:16,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1117 transitions. [2022-07-22 21:18:16,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 21:18:16,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:16,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:16,144 INFO L186 Difference]: Start difference. First operand has 368 places, 380 transitions, 808 flow. Second operand 3 states and 1117 transitions. [2022-07-22 21:18:16,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 394 transitions, 934 flow [2022-07-22 21:18:16,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 394 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:16,150 INFO L242 Difference]: Finished difference. Result has 370 places, 380 transitions, 817 flow [2022-07-22 21:18:16,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=817, PETRI_PLACES=370, PETRI_TRANSITIONS=380} [2022-07-22 21:18:16,151 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -4 predicate places. [2022-07-22 21:18:16,152 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 380 transitions, 817 flow [2022-07-22 21:18:16,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 21:18:16,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:16,152 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:18:16,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1553265593, now seen corresponding path program 1 times [2022-07-22 21:18:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:16,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887983061] [2022-07-22 21:18:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:16,174 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 21:18:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887983061] [2022-07-22 21:18:16,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887983061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:16,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:16,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977348805] [2022-07-22 21:18:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:16,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-22 21:18:16,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 380 transitions, 817 flow. Second operand has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 21:18:16,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:16,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-22 21:18:16,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:19,641 INFO L129 PetriNetUnfolder]: 3197/14565 cut-off events. [2022-07-22 21:18:19,641 INFO L130 PetriNetUnfolder]: For 1515/1515 co-relation queries the response was YES. [2022-07-22 21:18:19,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 14565 events. 3197/14565 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 169203 event pairs, 1530 based on Foata normal form. 0/12810 useless extension candidates. Maximal degree in co-relation 19479. Up to 2215 conditions per place. [2022-07-22 21:18:20,029 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 32 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-22 21:18:20,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 393 transitions, 931 flow [2022-07-22 21:18:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-07-22 21:18:20,032 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8878357030015798 [2022-07-22 21:18:20,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-07-22 21:18:20,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-07-22 21:18:20,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:20,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-07-22 21:18:20,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 21:18:20,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:20,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:20,038 INFO L186 Difference]: Start difference. First operand has 370 places, 380 transitions, 817 flow. Second operand 3 states and 1124 transitions. [2022-07-22 21:18:20,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 393 transitions, 931 flow [2022-07-22 21:18:20,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 393 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:20,047 INFO L242 Difference]: Finished difference. Result has 372 places, 381 transitions, 826 flow [2022-07-22 21:18:20,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=826, PETRI_PLACES=372, PETRI_TRANSITIONS=381} [2022-07-22 21:18:20,048 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -2 predicate places. [2022-07-22 21:18:20,048 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 381 transitions, 826 flow [2022-07-22 21:18:20,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 21:18:20,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:20,049 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:20,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:18:20,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash 431457669, now seen corresponding path program 1 times [2022-07-22 21:18:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:20,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131407796] [2022-07-22 21:18:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:20,085 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 21:18:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131407796] [2022-07-22 21:18:20,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131407796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:18:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063635445] [2022-07-22 21:18:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:20,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:18:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:18:20,088 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 21:18:20,089 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 21:18:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:18:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:18:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:20,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:18:20,354 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 21:18:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063635445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:18:20,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:18:20,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-22 21:18:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170904681] [2022-07-22 21:18:20,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:18:20,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:18:20,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:18:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:18:20,365 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 422 [2022-07-22 21:18:20,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 381 transitions, 826 flow. Second operand has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 21:18:20,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:20,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 422 [2022-07-22 21:18:20,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:23,898 INFO L129 PetriNetUnfolder]: 3613/14085 cut-off events. [2022-07-22 21:18:23,898 INFO L130 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-07-22 21:18:24,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20200 conditions, 14085 events. 3613/14085 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 158563 event pairs, 1218 based on Foata normal form. 63/12466 useless extension candidates. Maximal degree in co-relation 20186. Up to 1723 conditions per place. [2022-07-22 21:18:24,373 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 62 selfloop transitions, 6 changer transitions 0/426 dead transitions. [2022-07-22 21:18:24,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 426 transitions, 1152 flow [2022-07-22 21:18:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2241 transitions. [2022-07-22 21:18:24,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8850710900473934 [2022-07-22 21:18:24,377 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2241 transitions. [2022-07-22 21:18:24,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2241 transitions. [2022-07-22 21:18:24,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:24,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2241 transitions. [2022-07-22 21:18:24,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 373.5) internal successors, (2241), 6 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 21:18:24,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states 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 21:18:24,396 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states 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 21:18:24,396 INFO L186 Difference]: Start difference. First operand has 372 places, 381 transitions, 826 flow. Second operand 6 states and 2241 transitions. [2022-07-22 21:18:24,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 426 transitions, 1152 flow [2022-07-22 21:18:24,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 426 transitions, 1150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:24,403 INFO L242 Difference]: Finished difference. Result has 380 places, 384 transitions, 860 flow [2022-07-22 21:18:24,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=380, PETRI_TRANSITIONS=384} [2022-07-22 21:18:24,404 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 6 predicate places. [2022-07-22 21:18:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 384 transitions, 860 flow [2022-07-22 21:18:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 21:18:24,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:24,405 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:24,423 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 21:18:24,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 21:18:24,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash -805755012, now seen corresponding path program 1 times [2022-07-22 21:18:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681207409] [2022-07-22 21:18:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:24,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:18:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681207409] [2022-07-22 21:18:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681207409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:24,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535759096] [2022-07-22 21:18:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:24,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-22 21:18:24,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 384 transitions, 860 flow. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 21:18:24,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:24,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-22 21:18:24,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:30,027 INFO L129 PetriNetUnfolder]: 4556/21174 cut-off events. [2022-07-22 21:18:30,028 INFO L130 PetriNetUnfolder]: For 1540/1540 co-relation queries the response was YES. [2022-07-22 21:18:30,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 21174 events. 4556/21174 cut-off events. For 1540/1540 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 256339 event pairs, 2037 based on Foata normal form. 0/18359 useless extension candidates. Maximal degree in co-relation 27350. Up to 2421 conditions per place. [2022-07-22 21:18:30,735 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 35 selfloop transitions, 3 changer transitions 0/397 dead transitions. [2022-07-22 21:18:30,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 397 transitions, 977 flow [2022-07-22 21:18:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2022-07-22 21:18:30,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8815165876777251 [2022-07-22 21:18:30,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2022-07-22 21:18:30,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2022-07-22 21:18:30,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:30,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2022-07-22 21:18:30,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 21:18:30,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:30,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 21:18:30,742 INFO L186 Difference]: Start difference. First operand has 380 places, 384 transitions, 860 flow. Second operand 3 states and 1116 transitions. [2022-07-22 21:18:30,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 397 transitions, 977 flow [2022-07-22 21:18:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 397 transitions, 973 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:30,749 INFO L242 Difference]: Finished difference. Result has 382 places, 384 transitions, 867 flow [2022-07-22 21:18:30,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=867, PETRI_PLACES=382, PETRI_TRANSITIONS=384} [2022-07-22 21:18:30,750 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 8 predicate places. [2022-07-22 21:18:30,750 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 384 transitions, 867 flow [2022-07-22 21:18:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 21:18:30,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:30,751 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:18:30,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-22 21:18:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 137276488, now seen corresponding path program 1 times [2022-07-22 21:18:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941716052] [2022-07-22 21:18:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:30,771 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:30,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:30,798 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-22 21:18:30,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-22 21:18:30,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-22 21:18:30,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-22 21:18:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:18:30,800 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:30,802 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:30,802 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-22 21:18:30,982 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:30,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 430 places, 486 transitions, 1049 flow [2022-07-22 21:18:31,066 INFO L129 PetriNetUnfolder]: 78/575 cut-off events. [2022-07-22 21:18:31,066 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-22 21:18:31,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 575 events. 78/575 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2259 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2022-07-22 21:18:31,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 430 places, 486 transitions, 1049 flow [2022-07-22 21:18:31,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 430 places, 486 transitions, 1049 flow [2022-07-22 21:18:31,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:31,090 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@12f24fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@574a3a8f [2022-07-22 21:18:31,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-22 21:18:31,099 INFO L129 PetriNetUnfolder]: 13/172 cut-off events. [2022-07-22 21:18:31,099 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:18:31,099 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:31,099 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 21:18:31,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-22 21:18:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1647412281, now seen corresponding path program 1 times [2022-07-22 21:18:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:31,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977478724] [2022-07-22 21:18:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:31,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:31,115 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 21:18:31,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977478724] [2022-07-22 21:18:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977478724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:31,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:31,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:18:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746819902] [2022-07-22 21:18:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:18:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:18:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:18:31,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 486 [2022-07-22 21:18:31,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 486 transitions, 1049 flow. Second operand has 2 states, 2 states have (on average 429.0) internal successors, (858), 2 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 21:18:31,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:31,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 486 [2022-07-22 21:18:31,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:33,311 INFO L129 PetriNetUnfolder]: 1277/8862 cut-off events. [2022-07-22 21:18:33,312 INFO L130 PetriNetUnfolder]: For 4159/4159 co-relation queries the response was YES. [2022-07-22 21:18:33,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 8862 events. 1277/8862 cut-off events. For 4159/4159 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 91187 event pairs, 642 based on Foata normal form. 2956/10820 useless extension candidates. Maximal degree in co-relation 5383. Up to 897 conditions per place. [2022-07-22 21:18:33,593 INFO L132 encePairwiseOnDemand]: 449/486 looper letters, 14 selfloop transitions, 0 changer transitions 0/437 dead transitions. [2022-07-22 21:18:33,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 437 transitions, 979 flow [2022-07-22 21:18:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:18:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:18:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 907 transitions. [2022-07-22 21:18:33,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9331275720164609 [2022-07-22 21:18:33,595 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 907 transitions. [2022-07-22 21:18:33,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 907 transitions. [2022-07-22 21:18:33,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:33,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 907 transitions. [2022-07-22 21:18:33,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 453.5) internal successors, (907), 2 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 21:18:33,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 486.0) internal successors, (1458), 3 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 21:18:33,598 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 486.0) internal successors, (1458), 3 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 21:18:33,598 INFO L186 Difference]: Start difference. First operand has 430 places, 486 transitions, 1049 flow. Second operand 2 states and 907 transitions. [2022-07-22 21:18:33,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 437 transitions, 979 flow [2022-07-22 21:18:33,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 437 transitions, 937 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:33,606 INFO L242 Difference]: Finished difference. Result has 418 places, 437 transitions, 909 flow [2022-07-22 21:18:33,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=909, PETRI_PLACES=418, PETRI_TRANSITIONS=437} [2022-07-22 21:18:33,607 INFO L279 CegarLoopForPetriNet]: 430 programPoint places, -12 predicate places. [2022-07-22 21:18:33,607 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 437 transitions, 909 flow [2022-07-22 21:18:33,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 429.0) internal successors, (858), 2 states have internal predecessors, (858), 0 states have call successors, (0), 0 states 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 21:18:33,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:33,608 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:33,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:18:33,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-22 21:18:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1416531806, now seen corresponding path program 1 times [2022-07-22 21:18:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:33,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303838201] [2022-07-22 21:18:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:33,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:33,628 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 21:18:33,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303838201] [2022-07-22 21:18:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303838201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:33,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:33,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180826685] [2022-07-22 21:18:33,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:33,631 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 415 out of 486 [2022-07-22 21:18:33,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 437 transitions, 909 flow. Second operand has 3 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 21:18:33,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:33,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 415 of 486 [2022-07-22 21:18:33,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand