./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/13_unverif.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/13_unverif.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 ea403ebfe777a86c8f08ec54b02dc30e546c8fae743fed5fb0e88129df40ac76 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:18:03,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:18:03,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:18:03,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:18:03,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:18:03,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:18:03,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:18:03,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:18:03,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:18:03,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:18:03,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:18:03,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:18:03,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:18:03,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:18:03,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:18:03,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:18:03,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:18:03,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:18:03,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:18:03,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:18:03,501 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:18:03,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:18:03,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:18:03,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:18:03,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:18:03,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:18:03,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:18:03,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:18:03,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:18:03,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:18:03,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:18:03,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:18:03,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:18:03,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:18:03,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:18:03,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:18:03,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:18:03,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:18:03,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:18:03,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:18:03,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:18:03,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:18:03,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:18:03,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:18:03,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:18:03,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:18:03,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:18:03,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:18:03,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:18:03,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:18:03,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:18:03,541 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:18:03,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:18:03,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:18:03,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:18:03,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:18:03,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:18:03,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:18:03,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:18:03,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:18:03,544 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:18:03,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:18:03,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:18:03,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:18:03,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:18:03,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:18:03,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:18:03,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:03,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:18:03,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:18:03,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:18:03,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:18:03,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:18:03,548 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:18:03,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:18:03,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:18:03,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea403ebfe777a86c8f08ec54b02dc30e546c8fae743fed5fb0e88129df40ac76 [2022-07-22 21:18:03,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:18:03,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:18:03,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:18:03,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:18:03,811 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:18:03,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/13_unverif.i [2022-07-22 21:18:03,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdfed5fee/21fb0d483be2455da2445f2aad311b3c/FLAG7450a121b [2022-07-22 21:18:04,246 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:18:04,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/13_unverif.i [2022-07-22 21:18:04,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdfed5fee/21fb0d483be2455da2445f2aad311b3c/FLAG7450a121b [2022-07-22 21:18:04,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdfed5fee/21fb0d483be2455da2445f2aad311b3c [2022-07-22 21:18:04,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:18:04,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:18:04,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:04,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:18:04,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:18:04,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:04" (1/1) ... [2022-07-22 21:18:04,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755a65e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:04, skipping insertion in model container [2022-07-22 21:18:04,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:04" (1/1) ... [2022-07-22 21:18:04,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:18:04,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:18:04,987 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/13_unverif.i[30213,30226] [2022-07-22 21:18:04,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:05,006 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:18:05,048 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/13_unverif.i[30213,30226] [2022-07-22 21:18:05,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:05,075 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:18:05,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05 WrapperNode [2022-07-22 21:18:05,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:05,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:05,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:18:05,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:18:05,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,130 INFO L137 Inliner]: procedures = 168, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2022-07-22 21:18:05,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:05,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:18:05,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:18:05,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:18:05,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:18:05,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:18:05,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:18:05,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:18:05,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (1/1) ... [2022-07-22 21:18:05,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:18:05,245 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 21:18:05,272 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 21:18:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:18:05,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:18:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:18:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:18:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:18:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:18:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:18:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:18:05,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:18:05,294 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 21:18:05,413 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:18:05,415 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:18:05,538 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:18:05,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:18:05,556 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 21:18:05,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:05 BoogieIcfgContainer [2022-07-22 21:18:05,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:18:05,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:18:05,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:18:05,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:18:05,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:18:04" (1/3) ... [2022-07-22 21:18:05,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8d6980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:05, skipping insertion in model container [2022-07-22 21:18:05,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:05" (2/3) ... [2022-07-22 21:18:05,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8d6980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:05, skipping insertion in model container [2022-07-22 21:18:05,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:05" (3/3) ... [2022-07-22 21:18:05,568 INFO L111 eAbstractionObserver]: Analyzing ICFG 13_unverif.i [2022-07-22 21:18:05,582 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:18:05,588 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:18:05,588 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:18:05,588 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:18:05,619 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:05,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 93 flow [2022-07-22 21:18:05,708 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2022-07-22 21:18:05,708 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:05,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 55 events. 4/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 27. Up to 4 conditions per place. [2022-07-22 21:18:05,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 44 transitions, 93 flow [2022-07-22 21:18:05,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 44 transitions, 93 flow [2022-07-22 21:18:05,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:05,740 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@40accc8f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340e0791 [2022-07-22 21:18:05,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:18:05,759 INFO L129 PetriNetUnfolder]: 3/48 cut-off events. [2022-07-22 21:18:05,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:05,759 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:05,760 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:05,761 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 21:18:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1709671825, now seen corresponding path program 1 times [2022-07-22 21:18:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829265262] [2022-07-22 21:18:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:05,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:05,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:05,968 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:05,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-22 21:18:05,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-22 21:18:05,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-22 21:18:05,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:18:05,973 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 21:18:05,976 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:05,976 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:18:06,011 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:06,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 59 places, 59 transitions, 130 flow [2022-07-22 21:18:06,031 INFO L129 PetriNetUnfolder]: 7/83 cut-off events. [2022-07-22 21:18:06,031 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:18:06,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 83 events. 7/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 151 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 56. Up to 6 conditions per place. [2022-07-22 21:18:06,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 59 transitions, 130 flow [2022-07-22 21:18:06,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 59 transitions, 130 flow [2022-07-22 21:18:06,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:06,038 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@40accc8f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340e0791 [2022-07-22 21:18:06,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:18:06,050 INFO L129 PetriNetUnfolder]: 3/54 cut-off events. [2022-07-22 21:18:06,050 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:06,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:06,051 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] [2022-07-22 21:18:06,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:18:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1240991835, now seen corresponding path program 1 times [2022-07-22 21:18:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:06,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474691854] [2022-07-22 21:18:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:06,301 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 21:18:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474691854] [2022-07-22 21:18:06,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474691854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:06,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:06,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:06,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613470988] [2022-07-22 21:18:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:06,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 59 [2022-07-22 21:18:06,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 21:18:06,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:06,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 59 [2022-07-22 21:18:06,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:06,485 INFO L129 PetriNetUnfolder]: 55/201 cut-off events. [2022-07-22 21:18:06,485 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-22 21:18:06,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 201 events. 55/201 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 849 event pairs, 8 based on Foata normal form. 68/243 useless extension candidates. Maximal degree in co-relation 165. Up to 73 conditions per place. [2022-07-22 21:18:06,489 INFO L132 encePairwiseOnDemand]: 49/59 looper letters, 25 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2022-07-22 21:18:06,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 242 flow [2022-07-22 21:18:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 289 transitions. [2022-07-22 21:18:06,502 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8163841807909604 [2022-07-22 21:18:06,502 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 289 transitions. [2022-07-22 21:18:06,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 289 transitions. [2022-07-22 21:18:06,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:06,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 289 transitions. [2022-07-22 21:18:06,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 48.166666666666664) internal successors, (289), 6 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:06,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 21:18:06,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 21:18:06,517 INFO L186 Difference]: Start difference. First operand has 59 places, 59 transitions, 130 flow. Second operand 6 states and 289 transitions. [2022-07-22 21:18:06,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 242 flow [2022-07-22 21:18:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 240 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:06,522 INFO L242 Difference]: Finished difference. Result has 59 places, 57 transitions, 165 flow [2022-07-22 21:18:06,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2022-07-22 21:18:06,527 INFO L279 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2022-07-22 21:18:06,528 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 165 flow [2022-07-22 21:18:06,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 21:18:06,528 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:06,528 INFO L200 CegarLoopForPetriNet]: trace histogram [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 21:18:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:18:06,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:18:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 691681847, now seen corresponding path program 1 times [2022-07-22 21:18:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:06,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746141568] [2022-07-22 21:18:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:06,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746141568] [2022-07-22 21:18:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746141568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:06,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213435172] [2022-07-22 21:18:06,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:06,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:06,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:06,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 59 [2022-07-22 21:18:06,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 21:18:06,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:06,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 59 [2022-07-22 21:18:06,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:06,759 INFO L129 PetriNetUnfolder]: 67/219 cut-off events. [2022-07-22 21:18:06,759 INFO L130 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-07-22 21:18:06,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 219 events. 67/219 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 874 event pairs, 19 based on Foata normal form. 9/203 useless extension candidates. Maximal degree in co-relation 366. Up to 83 conditions per place. [2022-07-22 21:18:06,761 INFO L132 encePairwiseOnDemand]: 54/59 looper letters, 30 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2022-07-22 21:18:06,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 298 flow [2022-07-22 21:18:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2022-07-22 21:18:06,764 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8050847457627118 [2022-07-22 21:18:06,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2022-07-22 21:18:06,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2022-07-22 21:18:06,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:06,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2022-07-22 21:18:06,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 21:18:06,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 21:18:06,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 21:18:06,767 INFO L186 Difference]: Start difference. First operand has 59 places, 57 transitions, 165 flow. Second operand 4 states and 190 transitions. [2022-07-22 21:18:06,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 298 flow [2022-07-22 21:18:06,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:06,770 INFO L242 Difference]: Finished difference. Result has 65 places, 64 transitions, 238 flow [2022-07-22 21:18:06,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2022-07-22 21:18:06,771 INFO L279 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2022-07-22 21:18:06,771 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 238 flow [2022-07-22 21:18:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 21:18:06,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:06,772 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:18:06,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-22 21:18:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1316932227, now seen corresponding path program 1 times [2022-07-22 21:18:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021186637] [2022-07-22 21:18:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:06,787 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:06,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:06,799 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:06,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-22 21:18:06,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-22 21:18:06,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-22 21:18:06,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-22 21:18:06,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:18:06,801 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:18:06,801 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:06,801 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:18:06,814 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:06,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 74 transitions, 169 flow [2022-07-22 21:18:06,825 INFO L129 PetriNetUnfolder]: 10/111 cut-off events. [2022-07-22 21:18:06,826 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:18:06,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 111 events. 10/111 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2022-07-22 21:18:06,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 74 transitions, 169 flow [2022-07-22 21:18:06,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 74 transitions, 169 flow [2022-07-22 21:18:06,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:06,830 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@40accc8f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340e0791 [2022-07-22 21:18:06,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:18:06,834 INFO L129 PetriNetUnfolder]: 4/56 cut-off events. [2022-07-22 21:18:06,834 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:06,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:06,834 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] [2022-07-22 21:18:06,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 361438003, now seen corresponding path program 1 times [2022-07-22 21:18:06,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:06,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019024608] [2022-07-22 21:18:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:06,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:06,946 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 21:18:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:06,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019024608] [2022-07-22 21:18:06,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019024608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:06,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:06,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:06,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222910442] [2022-07-22 21:18:06,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:06,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:06,951 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-07-22 21:18:06,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 169 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 21:18:06,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:06,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-07-22 21:18:06,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:07,220 INFO L129 PetriNetUnfolder]: 464/1197 cut-off events. [2022-07-22 21:18:07,221 INFO L130 PetriNetUnfolder]: For 355/355 co-relation queries the response was YES. [2022-07-22 21:18:07,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1197 events. 464/1197 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8201 event pairs, 121 based on Foata normal form. 341/1366 useless extension candidates. Maximal degree in co-relation 520. Up to 553 conditions per place. [2022-07-22 21:18:07,235 INFO L132 encePairwiseOnDemand]: 62/74 looper letters, 40 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2022-07-22 21:18:07,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 371 flow [2022-07-22 21:18:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-07-22 21:18:07,240 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8063063063063063 [2022-07-22 21:18:07,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-07-22 21:18:07,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-07-22 21:18:07,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:07,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-07-22 21:18:07,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states 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 21:18:07,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 21:18:07,249 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 21:18:07,249 INFO L186 Difference]: Start difference. First operand has 74 places, 74 transitions, 169 flow. Second operand 6 states and 358 transitions. [2022-07-22 21:18:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 371 flow [2022-07-22 21:18:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 357 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:07,256 INFO L242 Difference]: Finished difference. Result has 73 places, 74 transitions, 218 flow [2022-07-22 21:18:07,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2022-07-22 21:18:07,257 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2022-07-22 21:18:07,258 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 218 flow [2022-07-22 21:18:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 21:18:07,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:07,258 INFO L200 CegarLoopForPetriNet]: trace histogram [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 21:18:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:18:07,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 117564147, now seen corresponding path program 1 times [2022-07-22 21:18:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682465649] [2022-07-22 21:18:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:07,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682465649] [2022-07-22 21:18:07,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682465649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:07,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:07,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:07,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164039448] [2022-07-22 21:18:07,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:07,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:07,376 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-07-22 21:18:07,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 21:18:07,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:07,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-07-22 21:18:07,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:07,638 INFO L129 PetriNetUnfolder]: 742/1473 cut-off events. [2022-07-22 21:18:07,638 INFO L130 PetriNetUnfolder]: For 565/565 co-relation queries the response was YES. [2022-07-22 21:18:07,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1473 events. 742/1473 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9216 event pairs, 222 based on Foata normal form. 55/1333 useless extension candidates. Maximal degree in co-relation 3313. Up to 709 conditions per place. [2022-07-22 21:18:07,655 INFO L132 encePairwiseOnDemand]: 68/74 looper letters, 47 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2022-07-22 21:18:07,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 430 flow [2022-07-22 21:18:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2022-07-22 21:18:07,657 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8006756756756757 [2022-07-22 21:18:07,657 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 237 transitions. [2022-07-22 21:18:07,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 237 transitions. [2022-07-22 21:18:07,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:07,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 237 transitions. [2022-07-22 21:18:07,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 21:18:07,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 21:18:07,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 21:18:07,660 INFO L186 Difference]: Start difference. First operand has 73 places, 74 transitions, 218 flow. Second operand 4 states and 237 transitions. [2022-07-22 21:18:07,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 430 flow [2022-07-22 21:18:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:07,667 INFO L242 Difference]: Finished difference. Result has 79 places, 84 transitions, 320 flow [2022-07-22 21:18:07,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2022-07-22 21:18:07,669 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-07-22 21:18:07,670 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 320 flow [2022-07-22 21:18:07,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 21:18:07,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:07,670 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] [2022-07-22 21:18:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:18:07,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1179531454, now seen corresponding path program 1 times [2022-07-22 21:18:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377475324] [2022-07-22 21:18:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:07,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:07,777 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 21:18:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377475324] [2022-07-22 21:18:07,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377475324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:07,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:07,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466112128] [2022-07-22 21:18:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:07,780 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-07-22 21:18:07,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 21:18:07,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:07,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-07-22 21:18:07,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:08,108 INFO L129 PetriNetUnfolder]: 980/2087 cut-off events. [2022-07-22 21:18:08,109 INFO L130 PetriNetUnfolder]: For 2170/2198 co-relation queries the response was YES. [2022-07-22 21:18:08,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5495 conditions, 2087 events. 980/2087 cut-off events. For 2170/2198 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14533 event pairs, 270 based on Foata normal form. 28/1860 useless extension candidates. Maximal degree in co-relation 5387. Up to 1297 conditions per place. [2022-07-22 21:18:08,133 INFO L132 encePairwiseOnDemand]: 67/74 looper letters, 51 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2022-07-22 21:18:08,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 125 transitions, 671 flow [2022-07-22 21:18:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2022-07-22 21:18:08,135 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7635135135135135 [2022-07-22 21:18:08,135 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2022-07-22 21:18:08,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2022-07-22 21:18:08,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:08,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2022-07-22 21:18:08,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 21:18:08,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 21:18:08,139 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 21:18:08,139 INFO L186 Difference]: Start difference. First operand has 79 places, 84 transitions, 320 flow. Second operand 6 states and 339 transitions. [2022-07-22 21:18:08,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 125 transitions, 671 flow [2022-07-22 21:18:08,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 663 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:08,146 INFO L242 Difference]: Finished difference. Result has 87 places, 106 transitions, 551 flow [2022-07-22 21:18:08,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=551, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2022-07-22 21:18:08,148 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 13 predicate places. [2022-07-22 21:18:08,148 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 551 flow [2022-07-22 21:18:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.333333333333336) internal successors, (296), 6 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 21:18:08,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:08,149 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:18:08,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1999828010, now seen corresponding path program 1 times [2022-07-22 21:18:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455944640] [2022-07-22 21:18:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:08,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:18:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455944640] [2022-07-22 21:18:08,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455944640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:08,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:08,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262255501] [2022-07-22 21:18:08,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:08,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2022-07-22 21:18:08,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 551 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:08,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:08,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2022-07-22 21:18:08,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:08,713 INFO L129 PetriNetUnfolder]: 1478/2863 cut-off events. [2022-07-22 21:18:08,714 INFO L130 PetriNetUnfolder]: For 4306/4343 co-relation queries the response was YES. [2022-07-22 21:18:08,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8840 conditions, 2863 events. 1478/2863 cut-off events. For 4306/4343 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19679 event pairs, 438 based on Foata normal form. 145/2770 useless extension candidates. Maximal degree in co-relation 8725. Up to 1406 conditions per place. [2022-07-22 21:18:08,777 INFO L132 encePairwiseOnDemand]: 68/74 looper letters, 75 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2022-07-22 21:18:08,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 147 transitions, 995 flow [2022-07-22 21:18:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 235 transitions. [2022-07-22 21:18:08,779 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793918918918919 [2022-07-22 21:18:08,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 235 transitions. [2022-07-22 21:18:08,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 235 transitions. [2022-07-22 21:18:08,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:08,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 235 transitions. [2022-07-22 21:18:08,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 21:18:08,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 21:18:08,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 21:18:08,781 INFO L186 Difference]: Start difference. First operand has 87 places, 106 transitions, 551 flow. Second operand 4 states and 235 transitions. [2022-07-22 21:18:08,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 147 transitions, 995 flow [2022-07-22 21:18:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 147 transitions, 985 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:08,793 INFO L242 Difference]: Finished difference. Result has 93 places, 130 transitions, 851 flow [2022-07-22 21:18:08,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=851, PETRI_PLACES=93, PETRI_TRANSITIONS=130} [2022-07-22 21:18:08,794 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-07-22 21:18:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 130 transitions, 851 flow [2022-07-22 21:18:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:08,795 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:08,795 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] [2022-07-22 21:18:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:18:08,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1339509203, now seen corresponding path program 1 times [2022-07-22 21:18:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329852769] [2022-07-22 21:18:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:08,847 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 21:18:08,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:08,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329852769] [2022-07-22 21:18:08,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329852769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:08,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:08,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:18:08,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470610624] [2022-07-22 21:18:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:18:08,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:18:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:18:08,851 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 74 [2022-07-22 21:18:08,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 130 transitions, 851 flow. Second operand has 5 states, 5 states have (on average 54.4) internal successors, (272), 5 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:08,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:08,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 74 [2022-07-22 21:18:08,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:08,950 INFO L129 PetriNetUnfolder]: 87/443 cut-off events. [2022-07-22 21:18:08,951 INFO L130 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-07-22 21:18:08,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 443 events. 87/443 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3023 event pairs, 30 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 841. Up to 156 conditions per place. [2022-07-22 21:18:08,957 INFO L132 encePairwiseOnDemand]: 64/74 looper letters, 15 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-07-22 21:18:08,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 428 flow [2022-07-22 21:18:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:18:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:18:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 293 transitions. [2022-07-22 21:18:08,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918918918918919 [2022-07-22 21:18:08,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 293 transitions. [2022-07-22 21:18:08,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 293 transitions. [2022-07-22 21:18:08,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:08,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 293 transitions. [2022-07-22 21:18:08,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 21:18:08,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 21:18:08,962 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 21:18:08,962 INFO L186 Difference]: Start difference. First operand has 93 places, 130 transitions, 851 flow. Second operand 5 states and 293 transitions. [2022-07-22 21:18:08,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 428 flow [2022-07-22 21:18:08,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 379 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-07-22 21:18:08,966 INFO L242 Difference]: Finished difference. Result has 88 places, 84 transitions, 355 flow [2022-07-22 21:18:08,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-07-22 21:18:08,967 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-07-22 21:18:08,967 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 355 flow [2022-07-22 21:18:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 5 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:08,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:08,968 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:08,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:18:08,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:18:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1387387467, now seen corresponding path program 1 times [2022-07-22 21:18:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:08,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514595468] [2022-07-22 21:18:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:08,979 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:08,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:08,990 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:08,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-22 21:18:08,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-22 21:18:08,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-22 21:18:08,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-22 21:18:08,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-22 21:18:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:18:08,992 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:18:08,992 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:08,992 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:18:09,008 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:09,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 89 transitions, 210 flow [2022-07-22 21:18:09,020 INFO L129 PetriNetUnfolder]: 13/139 cut-off events. [2022-07-22 21:18:09,021 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:18:09,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 13/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 289 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 119. Up to 10 conditions per place. [2022-07-22 21:18:09,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 89 transitions, 210 flow [2022-07-22 21:18:09,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 89 transitions, 210 flow [2022-07-22 21:18:09,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:09,024 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@40accc8f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340e0791 [2022-07-22 21:18:09,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:18:09,028 INFO L129 PetriNetUnfolder]: 3/54 cut-off events. [2022-07-22 21:18:09,028 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:09,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:09,028 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] [2022-07-22 21:18:09,028 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 21:18:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 894277633, now seen corresponding path program 1 times [2022-07-22 21:18:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:09,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830662428] [2022-07-22 21:18:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:09,121 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 21:18:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830662428] [2022-07-22 21:18:09,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830662428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:09,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:09,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39224124] [2022-07-22 21:18:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:09,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:09,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 21:18:09,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:09,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:09,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:09,785 INFO L129 PetriNetUnfolder]: 3217/6028 cut-off events. [2022-07-22 21:18:09,785 INFO L130 PetriNetUnfolder]: For 2395/2395 co-relation queries the response was YES. [2022-07-22 21:18:09,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 6028 events. 3217/6028 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44661 event pairs, 1068 based on Foata normal form. 1820/6773 useless extension candidates. Maximal degree in co-relation 2074. Up to 3830 conditions per place. [2022-07-22 21:18:09,851 INFO L132 encePairwiseOnDemand]: 75/89 looper letters, 55 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2022-07-22 21:18:09,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 510 flow [2022-07-22 21:18:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2022-07-22 21:18:09,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.799625468164794 [2022-07-22 21:18:09,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2022-07-22 21:18:09,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2022-07-22 21:18:09,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:09,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2022-07-22 21:18:09,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 21:18:09,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:09,857 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:09,857 INFO L186 Difference]: Start difference. First operand has 89 places, 89 transitions, 210 flow. Second operand 6 states and 427 transitions. [2022-07-22 21:18:09,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 510 flow [2022-07-22 21:18:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 474 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:09,861 INFO L242 Difference]: Finished difference. Result has 87 places, 91 transitions, 271 flow [2022-07-22 21:18:09,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2022-07-22 21:18:09,862 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, -2 predicate places. [2022-07-22 21:18:09,862 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 271 flow [2022-07-22 21:18:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 21:18:09,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:09,863 INFO L200 CegarLoopForPetriNet]: trace histogram [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 21:18:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:18:09,863 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 21:18:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:09,864 INFO L85 PathProgramCache]: Analyzing trace with hash -256042260, now seen corresponding path program 1 times [2022-07-22 21:18:09,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:09,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829022219] [2022-07-22 21:18:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829022219] [2022-07-22 21:18:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829022219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:09,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:09,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652982926] [2022-07-22 21:18:09,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:09,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:09,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 21:18:09,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:09,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:09,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:10,965 INFO L129 PetriNetUnfolder]: 5680/9273 cut-off events. [2022-07-22 21:18:10,966 INFO L130 PetriNetUnfolder]: For 3502/3502 co-relation queries the response was YES. [2022-07-22 21:18:11,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21837 conditions, 9273 events. 5680/9273 cut-off events. For 3502/3502 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 65853 event pairs, 1693 based on Foata normal form. 297/8235 useless extension candidates. Maximal degree in co-relation 21720. Up to 4829 conditions per place. [2022-07-22 21:18:11,083 INFO L132 encePairwiseOnDemand]: 82/89 looper letters, 64 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2022-07-22 21:18:11,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 562 flow [2022-07-22 21:18:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2022-07-22 21:18:11,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.797752808988764 [2022-07-22 21:18:11,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2022-07-22 21:18:11,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2022-07-22 21:18:11,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:11,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2022-07-22 21:18:11,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 21:18:11,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:11,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:11,088 INFO L186 Difference]: Start difference. First operand has 87 places, 91 transitions, 271 flow. Second operand 4 states and 284 transitions. [2022-07-22 21:18:11,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 562 flow [2022-07-22 21:18:11,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:11,099 INFO L242 Difference]: Finished difference. Result has 93 places, 104 transitions, 402 flow [2022-07-22 21:18:11,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=93, PETRI_TRANSITIONS=104} [2022-07-22 21:18:11,101 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2022-07-22 21:18:11,101 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 402 flow [2022-07-22 21:18:11,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 21:18:11,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:11,102 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] [2022-07-22 21:18:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:18:11,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1275921609, now seen corresponding path program 1 times [2022-07-22 21:18:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:11,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656868117] [2022-07-22 21:18:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:11,223 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 21:18:11,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:11,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656868117] [2022-07-22 21:18:11,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656868117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:11,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:11,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418614012] [2022-07-22 21:18:11,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:11,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:11,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:11,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:11,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 104 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 21:18:11,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:11,227 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:11,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:12,704 INFO L129 PetriNetUnfolder]: 7598/13215 cut-off events. [2022-07-22 21:18:12,704 INFO L130 PetriNetUnfolder]: For 14094/14175 co-relation queries the response was YES. [2022-07-22 21:18:12,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36097 conditions, 13215 events. 7598/13215 cut-off events. For 14094/14175 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 105910 event pairs, 2335 based on Foata normal form. 81/11611 useless extension candidates. Maximal degree in co-relation 35988. Up to 9496 conditions per place. [2022-07-22 21:18:12,893 INFO L132 encePairwiseOnDemand]: 81/89 looper letters, 71 selfloop transitions, 38 changer transitions 0/163 dead transitions. [2022-07-22 21:18:12,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 163 transitions, 901 flow [2022-07-22 21:18:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 406 transitions. [2022-07-22 21:18:12,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7602996254681648 [2022-07-22 21:18:12,896 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 406 transitions. [2022-07-22 21:18:12,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 406 transitions. [2022-07-22 21:18:12,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:12,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 406 transitions. [2022-07-22 21:18:12,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 21:18:12,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:12,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:12,899 INFO L186 Difference]: Start difference. First operand has 93 places, 104 transitions, 402 flow. Second operand 6 states and 406 transitions. [2022-07-22 21:18:12,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 163 transitions, 901 flow [2022-07-22 21:18:12,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 163 transitions, 891 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:12,921 INFO L242 Difference]: Finished difference. Result has 101 places, 134 transitions, 717 flow [2022-07-22 21:18:12,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=101, PETRI_TRANSITIONS=134} [2022-07-22 21:18:12,922 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 12 predicate places. [2022-07-22 21:18:12,922 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 134 transitions, 717 flow [2022-07-22 21:18:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 21:18:12,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:12,923 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:12,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:18:12,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -518940092, now seen corresponding path program 1 times [2022-07-22 21:18:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:12,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378170057] [2022-07-22 21:18:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:18:13,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:13,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378170057] [2022-07-22 21:18:13,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378170057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:13,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:13,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112870057] [2022-07-22 21:18:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:13,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:13,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 134 transitions, 717 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 21:18:13,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:13,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:13,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,030 INFO L129 PetriNetUnfolder]: 12548/20172 cut-off events. [2022-07-22 21:18:15,031 INFO L130 PetriNetUnfolder]: For 30780/30943 co-relation queries the response was YES. [2022-07-22 21:18:15,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62461 conditions, 20172 events. 12548/20172 cut-off events. For 30780/30943 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 156481 event pairs, 3752 based on Foata normal form. 772/18791 useless extension candidates. Maximal degree in co-relation 62345. Up to 10950 conditions per place. [2022-07-22 21:18:15,314 INFO L132 encePairwiseOnDemand]: 82/89 looper letters, 103 selfloop transitions, 34 changer transitions 0/191 dead transitions. [2022-07-22 21:18:15,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 191 transitions, 1320 flow [2022-07-22 21:18:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2022-07-22 21:18:15,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921348314606742 [2022-07-22 21:18:15,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 282 transitions. [2022-07-22 21:18:15,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 282 transitions. [2022-07-22 21:18:15,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:15,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 282 transitions. [2022-07-22 21:18:15,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:15,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:15,320 INFO L186 Difference]: Start difference. First operand has 101 places, 134 transitions, 717 flow. Second operand 4 states and 282 transitions. [2022-07-22 21:18:15,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 191 transitions, 1320 flow [2022-07-22 21:18:15,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 191 transitions, 1306 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:15,384 INFO L242 Difference]: Finished difference. Result has 107 places, 166 transitions, 1116 flow [2022-07-22 21:18:15,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=107, PETRI_TRANSITIONS=166} [2022-07-22 21:18:15,385 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 18 predicate places. [2022-07-22 21:18:15,385 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 166 transitions, 1116 flow [2022-07-22 21:18:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 21:18:15,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:15,386 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] [2022-07-22 21:18:15,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:18:15,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash 391137215, now seen corresponding path program 1 times [2022-07-22 21:18:15,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:15,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750146495] [2022-07-22 21:18:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:15,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:15,455 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 21:18:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:15,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750146495] [2022-07-22 21:18:15,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750146495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:15,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:15,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:18:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104872327] [2022-07-22 21:18:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:18:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:18:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:18:15,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 89 [2022-07-22 21:18:15,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 166 transitions, 1116 flow. Second operand has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:15,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 89 [2022-07-22 21:18:15,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,812 INFO L129 PetriNetUnfolder]: 617/1730 cut-off events. [2022-07-22 21:18:15,812 INFO L130 PetriNetUnfolder]: For 572/572 co-relation queries the response was YES. [2022-07-22 21:18:15,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3488 conditions, 1730 events. 617/1730 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14307 event pairs, 302 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 3390. Up to 1000 conditions per place. [2022-07-22 21:18:15,830 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 21 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2022-07-22 21:18:15,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 111 transitions, 557 flow [2022-07-22 21:18:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:18:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:18:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2022-07-22 21:18:15,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7820224719101123 [2022-07-22 21:18:15,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2022-07-22 21:18:15,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2022-07-22 21:18:15,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:15,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2022-07-22 21:18:15,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 21:18:15,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 89.0) internal successors, (534), 6 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 21:18:15,836 INFO L186 Difference]: Start difference. First operand has 107 places, 166 transitions, 1116 flow. Second operand 5 states and 348 transitions. [2022-07-22 21:18:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 111 transitions, 557 flow [2022-07-22 21:18:15,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 498 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-07-22 21:18:15,841 INFO L242 Difference]: Finished difference. Result has 102 places, 106 transitions, 457 flow [2022-07-22 21:18:15,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2022-07-22 21:18:15,841 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 13 predicate places. [2022-07-22 21:18:15,842 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 457 flow [2022-07-22 21:18:15,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:15,842 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] [2022-07-22 21:18:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:18:15,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash -345034686, now seen corresponding path program 1 times [2022-07-22 21:18:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068654552] [2022-07-22 21:18:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:15,926 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 21:18:15,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068654552] [2022-07-22 21:18:15,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068654552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:15,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:15,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978903249] [2022-07-22 21:18:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:15,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:15,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 21:18:15,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:15,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:15,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:16,569 INFO L129 PetriNetUnfolder]: 2167/5516 cut-off events. [2022-07-22 21:18:16,570 INFO L130 PetriNetUnfolder]: For 4429/4459 co-relation queries the response was YES. [2022-07-22 21:18:16,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13751 conditions, 5516 events. 2167/5516 cut-off events. For 4429/4459 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54849 event pairs, 879 based on Foata normal form. 2/5030 useless extension candidates. Maximal degree in co-relation 12402. Up to 1806 conditions per place. [2022-07-22 21:18:16,623 INFO L132 encePairwiseOnDemand]: 81/89 looper letters, 79 selfloop transitions, 35 changer transitions 0/167 dead transitions. [2022-07-22 21:18:16,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 1026 flow [2022-07-22 21:18:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-07-22 21:18:16,627 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7415730337078652 [2022-07-22 21:18:16,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-07-22 21:18:16,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-07-22 21:18:16,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:16,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-07-22 21:18:16,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 21:18:16,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:16,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 21:18:16,634 INFO L186 Difference]: Start difference. First operand has 102 places, 106 transitions, 457 flow. Second operand 6 states and 396 transitions. [2022-07-22 21:18:16,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 1026 flow [2022-07-22 21:18:16,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 1025 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:16,639 INFO L242 Difference]: Finished difference. Result has 109 places, 125 transitions, 714 flow [2022-07-22 21:18:16,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2022-07-22 21:18:16,641 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 20 predicate places. [2022-07-22 21:18:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 714 flow [2022-07-22 21:18:16,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 21:18:16,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:16,642 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:18:16,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1070488977, now seen corresponding path program 1 times [2022-07-22 21:18:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:16,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719997110] [2022-07-22 21:18:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 21:18:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719997110] [2022-07-22 21:18:16,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719997110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:16,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:16,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:16,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244105686] [2022-07-22 21:18:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:16,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:16,723 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 89 [2022-07-22 21:18:16,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 714 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 21:18:16,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:16,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 89 [2022-07-22 21:18:16,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:17,278 INFO L129 PetriNetUnfolder]: 2160/5567 cut-off events. [2022-07-22 21:18:17,279 INFO L130 PetriNetUnfolder]: For 6096/6096 co-relation queries the response was YES. [2022-07-22 21:18:17,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14635 conditions, 5567 events. 2160/5567 cut-off events. For 6096/6096 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56628 event pairs, 1250 based on Foata normal form. 27/5142 useless extension candidates. Maximal degree in co-relation 14519. Up to 2336 conditions per place. [2022-07-22 21:18:17,342 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 79 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-07-22 21:18:17,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 138 transitions, 956 flow [2022-07-22 21:18:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2022-07-22 21:18:17,344 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7191011235955056 [2022-07-22 21:18:17,344 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 256 transitions. [2022-07-22 21:18:17,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 256 transitions. [2022-07-22 21:18:17,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:17,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 256 transitions. [2022-07-22 21:18:17,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 21:18:17,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:17,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 21:18:17,347 INFO L186 Difference]: Start difference. First operand has 109 places, 125 transitions, 714 flow. Second operand 4 states and 256 transitions. [2022-07-22 21:18:17,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 138 transitions, 956 flow [2022-07-22 21:18:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 138 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:17,364 INFO L242 Difference]: Finished difference. Result has 110 places, 124 transitions, 706 flow [2022-07-22 21:18:17,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2022-07-22 21:18:17,365 INFO L279 CegarLoopForPetriNet]: 89 programPoint places, 21 predicate places. [2022-07-22 21:18:17,366 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 706 flow [2022-07-22 21:18:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 21:18:17,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:17,366 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:17,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:18:17,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:18:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash 399352504, now seen corresponding path program 1 times [2022-07-22 21:18:17,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760102282] [2022-07-22 21:18:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:17,383 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:18:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:18:17,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:18:17,396 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:18:17,396 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:18:17,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:18:17,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:18:17,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:18:17,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:18:17,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:18:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:18:17,397 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:17,398 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:18:17,398 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:18:17,423 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:17,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 104 places, 104 transitions, 253 flow [2022-07-22 21:18:17,439 INFO L129 PetriNetUnfolder]: 16/167 cut-off events. [2022-07-22 21:18:17,440 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:18:17,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 167 events. 16/167 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 358 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2022-07-22 21:18:17,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 104 transitions, 253 flow [2022-07-22 21:18:17,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 104 transitions, 253 flow [2022-07-22 21:18:17,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:17,444 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@40accc8f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340e0791 [2022-07-22 21:18:17,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:18:17,448 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2022-07-22 21:18:17,448 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:17,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:17,448 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] [2022-07-22 21:18:17,448 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 21:18:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 310982927, now seen corresponding path program 1 times [2022-07-22 21:18:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:17,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946477252] [2022-07-22 21:18:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:17,554 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 21:18:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946477252] [2022-07-22 21:18:17,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946477252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:17,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:17,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685292693] [2022-07-22 21:18:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:17,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:17,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-07-22 21:18:17,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 21:18:17,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:17,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-07-22 21:18:17,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:19,915 INFO L129 PetriNetUnfolder]: 20084/32390 cut-off events. [2022-07-22 21:18:19,916 INFO L130 PetriNetUnfolder]: For 16000/16000 co-relation queries the response was YES. [2022-07-22 21:18:20,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64373 conditions, 32390 events. 20084/32390 cut-off events. For 16000/16000 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 256036 event pairs, 7650 based on Foata normal form. 9560/36136 useless extension candidates. Maximal degree in co-relation 11483. Up to 23743 conditions per place. [2022-07-22 21:18:20,305 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 70 selfloop transitions, 22 changer transitions 0/151 dead transitions. [2022-07-22 21:18:20,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 659 flow [2022-07-22 21:18:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2022-07-22 21:18:20,308 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-07-22 21:18:20,308 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2022-07-22 21:18:20,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2022-07-22 21:18:20,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:20,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2022-07-22 21:18:20,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 21:18:20,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:20,310 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:20,311 INFO L186 Difference]: Start difference. First operand has 104 places, 104 transitions, 253 flow. Second operand 6 states and 496 transitions. [2022-07-22 21:18:20,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 659 flow [2022-07-22 21:18:20,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 591 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:20,317 INFO L242 Difference]: Finished difference. Result has 101 places, 108 transitions, 324 flow [2022-07-22 21:18:20,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2022-07-22 21:18:20,318 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-07-22 21:18:20,318 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 324 flow [2022-07-22 21:18:20,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 21:18:20,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:20,319 INFO L200 CegarLoopForPetriNet]: trace histogram [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 21:18:20,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:18:20,319 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 21:18:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 249140280, now seen corresponding path program 1 times [2022-07-22 21:18:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090706831] [2022-07-22 21:18:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090706831] [2022-07-22 21:18:20,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090706831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:20,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:20,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455756860] [2022-07-22 21:18:20,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:20,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:20,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-07-22 21:18:20,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 21:18:20,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:20,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-07-22 21:18:20,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:24,993 INFO L129 PetriNetUnfolder]: 37888/55374 cut-off events. [2022-07-22 21:18:24,993 INFO L130 PetriNetUnfolder]: For 20108/20108 co-relation queries the response was YES. [2022-07-22 21:18:25,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130956 conditions, 55374 events. 37888/55374 cut-off events. For 20108/20108 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 415113 event pairs, 11484 based on Foata normal form. 1531/48435 useless extension candidates. Maximal degree in co-relation 130838. Up to 30055 conditions per place. [2022-07-22 21:18:25,552 INFO L132 encePairwiseOnDemand]: 96/104 looper letters, 81 selfloop transitions, 17 changer transitions 0/157 dead transitions. [2022-07-22 21:18:25,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 694 flow [2022-07-22 21:18:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 331 transitions. [2022-07-22 21:18:25,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956730769230769 [2022-07-22 21:18:25,553 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 331 transitions. [2022-07-22 21:18:25,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 331 transitions. [2022-07-22 21:18:25,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:25,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 331 transitions. [2022-07-22 21:18:25,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.75) internal successors, (331), 4 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 21:18:25,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 21:18:25,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 21:18:25,556 INFO L186 Difference]: Start difference. First operand has 101 places, 108 transitions, 324 flow. Second operand 4 states and 331 transitions. [2022-07-22 21:18:25,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 694 flow [2022-07-22 21:18:25,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 157 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:25,566 INFO L242 Difference]: Finished difference. Result has 107 places, 124 transitions, 484 flow [2022-07-22 21:18:25,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=484, PETRI_PLACES=107, PETRI_TRANSITIONS=124} [2022-07-22 21:18:25,566 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2022-07-22 21:18:25,567 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 124 transitions, 484 flow [2022-07-22 21:18:25,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 21:18:25,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:25,567 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] [2022-07-22 21:18:25,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:18:25,567 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 21:18:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 760856031, now seen corresponding path program 1 times [2022-07-22 21:18:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048950877] [2022-07-22 21:18:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:25,648 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 21:18:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:25,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048950877] [2022-07-22 21:18:25,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048950877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:25,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:25,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119848894] [2022-07-22 21:18:25,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:25,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-07-22 21:18:25,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 124 transitions, 484 flow. Second operand has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 21:18:25,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:25,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-07-22 21:18:25,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:32,137 INFO L129 PetriNetUnfolder]: 50460/76960 cut-off events. [2022-07-22 21:18:32,137 INFO L130 PetriNetUnfolder]: For 84790/85045 co-relation queries the response was YES. [2022-07-22 21:18:32,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217055 conditions, 76960 events. 50460/76960 cut-off events. For 84790/85045 co-relation queries the response was YES. Maximal size of possible extension queue 2861. Compared 640103 event pairs, 17427 based on Foata normal form. 255/66422 useless extension candidates. Maximal degree in co-relation 216945. Up to 61072 conditions per place. [2022-07-22 21:18:33,305 INFO L132 encePairwiseOnDemand]: 95/104 looper letters, 91 selfloop transitions, 48 changer transitions 0/201 dead transitions. [2022-07-22 21:18:33,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 201 transitions, 1131 flow [2022-07-22 21:18:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:18:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:18:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 473 transitions. [2022-07-22 21:18:33,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7580128205128205 [2022-07-22 21:18:33,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 473 transitions. [2022-07-22 21:18:33,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 473 transitions. [2022-07-22 21:18:33,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:33,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 473 transitions. [2022-07-22 21:18:33,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:33,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:33,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:33,309 INFO L186 Difference]: Start difference. First operand has 107 places, 124 transitions, 484 flow. Second operand 6 states and 473 transitions. [2022-07-22 21:18:33,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 201 transitions, 1131 flow [2022-07-22 21:18:33,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 201 transitions, 1119 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:33,436 INFO L242 Difference]: Finished difference. Result has 115 places, 162 transitions, 883 flow [2022-07-22 21:18:33,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=883, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2022-07-22 21:18:33,437 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-22 21:18:33,437 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 883 flow [2022-07-22 21:18:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 21:18:33,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:33,438 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:18:33,438 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 21:18:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2120804122, now seen corresponding path program 1 times [2022-07-22 21:18:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101242330] [2022-07-22 21:18:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:18:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101242330] [2022-07-22 21:18:33,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101242330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:33,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:33,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540069414] [2022-07-22 21:18:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:33,498 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-07-22 21:18:33,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 883 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 21:18:33,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:33,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-07-22 21:18:33,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:44,835 INFO L129 PetriNetUnfolder]: 85344/125078 cut-off events. [2022-07-22 21:18:44,835 INFO L130 PetriNetUnfolder]: For 189558/190335 co-relation queries the response was YES. [2022-07-22 21:18:45,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384276 conditions, 125078 events. 85344/125078 cut-off events. For 189558/190335 co-relation queries the response was YES. Maximal size of possible extension queue 4491. Compared 1029231 event pairs, 25394 based on Foata normal form. 3939/113587 useless extension candidates. Maximal degree in co-relation 384159. Up to 69593 conditions per place. [2022-07-22 21:18:46,886 INFO L132 encePairwiseOnDemand]: 96/104 looper letters, 131 selfloop transitions, 42 changer transitions 0/235 dead transitions. [2022-07-22 21:18:46,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 235 transitions, 1645 flow [2022-07-22 21:18:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 329 transitions. [2022-07-22 21:18:46,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7908653846153846 [2022-07-22 21:18:46,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 329 transitions. [2022-07-22 21:18:46,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 329 transitions. [2022-07-22 21:18:46,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:46,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 329 transitions. [2022-07-22 21:18:46,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 21:18:46,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 21:18:46,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 21:18:46,891 INFO L186 Difference]: Start difference. First operand has 115 places, 162 transitions, 883 flow. Second operand 4 states and 329 transitions. [2022-07-22 21:18:46,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 235 transitions, 1645 flow [2022-07-22 21:18:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 235 transitions, 1627 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-07-22 21:18:47,556 INFO L242 Difference]: Finished difference. Result has 121 places, 202 transitions, 1381 flow [2022-07-22 21:18:47,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1381, PETRI_PLACES=121, PETRI_TRANSITIONS=202} [2022-07-22 21:18:47,557 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 17 predicate places. [2022-07-22 21:18:47,557 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 202 transitions, 1381 flow [2022-07-22 21:18:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 21:18:47,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:47,557 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] [2022-07-22 21:18:47,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:18:47,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:18:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash -202131593, now seen corresponding path program 1 times [2022-07-22 21:18:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:47,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733249098] [2022-07-22 21:18:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:47,611 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 21:18:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:47,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733249098] [2022-07-22 21:18:47,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733249098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:47,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:47,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:18:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402419541] [2022-07-22 21:18:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:18:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:18:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:18:47,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2022-07-22 21:18:47,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 202 transitions, 1381 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 21:18:47,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:47,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2022-07-22 21:18:47,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:48,289 INFO L129 PetriNetUnfolder]: 3461/7528 cut-off events. [2022-07-22 21:18:48,290 INFO L130 PetriNetUnfolder]: For 1737/1737 co-relation queries the response was YES. [2022-07-22 21:18:48,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14626 conditions, 7528 events. 3461/7528 cut-off events. For 1737/1737 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 69897 event pairs, 2108 based on Foata normal form. 0/7101 useless extension candidates. Maximal degree in co-relation 14449. Up to 5100 conditions per place. [2022-07-22 21:18:48,533 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 27 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2022-07-22 21:18:48,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 135 transitions, 686 flow [2022-07-22 21:18:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:18:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:18:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-07-22 21:18:48,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.775 [2022-07-22 21:18:48,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-07-22 21:18:48,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-07-22 21:18:48,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:48,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-07-22 21:18:48,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 21:18:48,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states 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 21:18:48,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states 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 21:18:48,549 INFO L186 Difference]: Start difference. First operand has 121 places, 202 transitions, 1381 flow. Second operand 5 states and 403 transitions. [2022-07-22 21:18:48,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 135 transitions, 686 flow [2022-07-22 21:18:48,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 135 transitions, 617 flow, removed 14 selfloop flow, removed 7 redundant places. [2022-07-22 21:18:48,555 INFO L242 Difference]: Finished difference. Result has 116 places, 128 transitions, 559 flow [2022-07-22 21:18:48,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2022-07-22 21:18:48,556 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 12 predicate places. [2022-07-22 21:18:48,556 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 559 flow [2022-07-22 21:18:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 21:18:48,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:48,557 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] [2022-07-22 21:18:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:18:48,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-22 21:18:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1146411760, now seen corresponding path program 1 times [2022-07-22 21:18:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:48,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971336941] [2022-07-22 21:18:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:48,637 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 21:18:48,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:48,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971336941] [2022-07-22 21:18:48,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971336941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:48,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:48,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:48,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237534605] [2022-07-22 21:18:48,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:48,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:48,642 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-07-22 21:18:48,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 21:18:48,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:48,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-07-22 21:18:48,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand