./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --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/weaver/chl-array-int-symm.wvr.c -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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:38:18,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:38:18,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:38:18,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:38:18,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:38:18,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:38:18,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:38:18,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:38:18,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:38:18,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:38:18,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:38:18,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:38:18,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:38:18,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:38:18,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:38:18,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:38:18,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:38:18,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:38:18,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:38:18,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:38:18,289 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:38:18,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:38:18,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:38:18,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:38:18,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:38:18,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:38:18,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:38:18,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:38:18,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:38:18,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:38:18,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:38:18,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:38:18,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:38:18,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:38:18,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:38:18,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:38:18,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:38:18,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:38:18,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:38:18,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:38:18,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:38:18,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:38:18,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:38:18,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:38:18,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:38:18,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:38:18,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:38:18,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:38:18,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:38:18,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:38:18,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:38:18,346 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:38:18,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:38:18,346 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:38:18,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:38:18,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:38:18,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:38:18,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:38:18,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:38:18,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:38:18,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:38:18,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:38:18,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:38:18,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:38:18,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-07-22 21:38:18,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:38:18,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:38:18,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:38:18,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:38:18,587 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:38:18,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-22 21:38:18,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae33711bb/0be0806d5b864ca4923eb4547db070b6/FLAG0570e72b6 [2022-07-22 21:38:18,975 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:38:18,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-07-22 21:38:18,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae33711bb/0be0806d5b864ca4923eb4547db070b6/FLAG0570e72b6 [2022-07-22 21:38:19,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae33711bb/0be0806d5b864ca4923eb4547db070b6 [2022-07-22 21:38:19,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:38:19,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:38:19,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:38:19,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:38:19,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:38:19,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244b26b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19, skipping insertion in model container [2022-07-22 21:38:19,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:38:19,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:38:19,582 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/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-07-22 21:38:19,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:38:19,593 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:38:19,608 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/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-07-22 21:38:19,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:38:19,621 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:38:19,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19 WrapperNode [2022-07-22 21:38:19,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:38:19,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:38:19,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:38:19,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:38:19,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,663 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 198 [2022-07-22 21:38:19,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:38:19,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:38:19,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:38:19,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:38:19,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:38:19,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:38:19,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:38:19,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:38:19,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (1/1) ... [2022-07-22 21:38:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:38:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:19,731 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 21:38:19,741 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 21:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:38:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:38:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:38:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:38:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:38:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:38:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:38:19,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:38:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:38:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:38:19,760 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 21:38:19,824 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:38:19,825 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:38:20,114 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:38:20,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:38:20,122 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:38:20,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:38:20 BoogieIcfgContainer [2022-07-22 21:38:20,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:38:20,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:38:20,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:38:20,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:38:20,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:38:19" (1/3) ... [2022-07-22 21:38:20,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390cd4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:38:20, skipping insertion in model container [2022-07-22 21:38:20,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:38:19" (2/3) ... [2022-07-22 21:38:20,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390cd4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:38:20, skipping insertion in model container [2022-07-22 21:38:20,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:38:20" (3/3) ... [2022-07-22 21:38:20,135 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-07-22 21:38:20,139 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:38:20,146 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:38:20,146 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:38:20,146 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:38:20,227 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:38:20,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 258 transitions, 532 flow [2022-07-22 21:38:20,348 INFO L129 PetriNetUnfolder]: 21/256 cut-off events. [2022-07-22 21:38:20,349 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:38:20,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 21/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 347 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-07-22 21:38:20,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 258 transitions, 532 flow [2022-07-22 21:38:20,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 247 transitions, 506 flow [2022-07-22 21:38:20,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:38:20,387 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5b68e8a7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@510a4ab4 [2022-07-22 21:38:20,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:38:20,430 INFO L129 PetriNetUnfolder]: 21/246 cut-off events. [2022-07-22 21:38:20,430 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:38:20,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:20,435 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:20,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 727559992, now seen corresponding path program 1 times [2022-07-22 21:38:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24682772] [2022-07-22 21:38:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:20,654 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 21:38:20,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:20,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24682772] [2022-07-22 21:38:20,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24682772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:20,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:20,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:38:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286788367] [2022-07-22 21:38:20,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:20,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:38:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:38:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:38:20,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 258 [2022-07-22 21:38:20,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 247 transitions, 506 flow. Second operand has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:20,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:20,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 258 [2022-07-22 21:38:20,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:20,766 INFO L129 PetriNetUnfolder]: 6/232 cut-off events. [2022-07-22 21:38:20,767 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:38:20,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 232 events. 6/232 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 17/232 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-07-22 21:38:20,773 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 4 selfloop transitions, 0 changer transitions 7/232 dead transitions. [2022-07-22 21:38:20,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 232 transitions, 484 flow [2022-07-22 21:38:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:38:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:38:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 495 transitions. [2022-07-22 21:38:20,788 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9593023255813954 [2022-07-22 21:38:20,789 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 495 transitions. [2022-07-22 21:38:20,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 495 transitions. [2022-07-22 21:38:20,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:20,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 495 transitions. [2022-07-22 21:38:20,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:20,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:20,805 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:20,806 INFO L186 Difference]: Start difference. First operand has 233 places, 247 transitions, 506 flow. Second operand 2 states and 495 transitions. [2022-07-22 21:38:20,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 232 transitions, 484 flow [2022-07-22 21:38:20,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 232 transitions, 476 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:38:20,818 INFO L242 Difference]: Finished difference. Result has 230 places, 225 transitions, 454 flow [2022-07-22 21:38:20,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=454, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2022-07-22 21:38:20,823 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, -3 predicate places. [2022-07-22 21:38:20,824 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 454 flow [2022-07-22 21:38:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:20,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:20,825 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:38:20,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash -38155261, now seen corresponding path program 1 times [2022-07-22 21:38:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:20,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223408036] [2022-07-22 21:38:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:21,606 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 21:38:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223408036] [2022-07-22 21:38:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223408036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:21,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:21,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426795757] [2022-07-22 21:38:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:21,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-22 21:38:21,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 454 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:21,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:21,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-22 21:38:21,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:22,794 INFO L129 PetriNetUnfolder]: 144/1812 cut-off events. [2022-07-22 21:38:22,795 INFO L130 PetriNetUnfolder]: For 28/34 co-relation queries the response was YES. [2022-07-22 21:38:22,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 1812 events. 144/1812 cut-off events. For 28/34 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13685 event pairs, 57 based on Foata normal form. 1/1645 useless extension candidates. Maximal degree in co-relation 2174. Up to 94 conditions per place. [2022-07-22 21:38:22,807 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 141 selfloop transitions, 27 changer transitions 12/339 dead transitions. [2022-07-22 21:38:22,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 1055 flow [2022-07-22 21:38:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:38:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:38:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4237 transitions. [2022-07-22 21:38:22,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6842700258397932 [2022-07-22 21:38:22,834 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4237 transitions. [2022-07-22 21:38:22,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4237 transitions. [2022-07-22 21:38:22,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:22,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4237 transitions. [2022-07-22 21:38:22,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.54166666666666) internal successors, (4237), 24 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:22,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:22,858 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:22,858 INFO L186 Difference]: Start difference. First operand has 230 places, 225 transitions, 454 flow. Second operand 24 states and 4237 transitions. [2022-07-22 21:38:22,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 1055 flow [2022-07-22 21:38:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 339 transitions, 1055 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:38:22,864 INFO L242 Difference]: Finished difference. Result has 258 places, 241 transitions, 602 flow [2022-07-22 21:38:22,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=602, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-07-22 21:38:22,865 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 25 predicate places. [2022-07-22 21:38:22,865 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 602 flow [2022-07-22 21:38:22,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:22,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:22,867 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:22,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:38:22,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash -411240785, now seen corresponding path program 2 times [2022-07-22 21:38:22,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:22,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055602357] [2022-07-22 21:38:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:22,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:23,272 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 21:38:23,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:23,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055602357] [2022-07-22 21:38:23,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055602357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:23,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:23,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:23,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088738139] [2022-07-22 21:38:23,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:23,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:23,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-22 21:38:23,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 241 transitions, 602 flow. Second operand has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:23,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:23,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-22 21:38:23,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:24,321 INFO L129 PetriNetUnfolder]: 140/1844 cut-off events. [2022-07-22 21:38:24,322 INFO L130 PetriNetUnfolder]: For 204/212 co-relation queries the response was YES. [2022-07-22 21:38:24,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 1844 events. 140/1844 cut-off events. For 204/212 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 13769 event pairs, 54 based on Foata normal form. 5/1688 useless extension candidates. Maximal degree in co-relation 2403. Up to 94 conditions per place. [2022-07-22 21:38:24,332 INFO L132 encePairwiseOnDemand]: 231/258 looper letters, 140 selfloop transitions, 29 changer transitions 12/340 dead transitions. [2022-07-22 21:38:24,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 340 transitions, 1224 flow [2022-07-22 21:38:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:38:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:38:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4236 transitions. [2022-07-22 21:38:24,340 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6841085271317829 [2022-07-22 21:38:24,340 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4236 transitions. [2022-07-22 21:38:24,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4236 transitions. [2022-07-22 21:38:24,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:24,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4236 transitions. [2022-07-22 21:38:24,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 176.5) internal successors, (4236), 24 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:24,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:24,375 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:24,375 INFO L186 Difference]: Start difference. First operand has 258 places, 241 transitions, 602 flow. Second operand 24 states and 4236 transitions. [2022-07-22 21:38:24,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 340 transitions, 1224 flow [2022-07-22 21:38:24,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 340 transitions, 1190 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-07-22 21:38:24,383 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 695 flow [2022-07-22 21:38:24,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=695, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-22 21:38:24,384 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-22 21:38:24,384 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 695 flow [2022-07-22 21:38:24,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 171.7) internal successors, (3434), 20 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:24,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:24,386 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:24,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:38:24,386 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1619395327, now seen corresponding path program 1 times [2022-07-22 21:38:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:24,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271783428] [2022-07-22 21:38:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:24,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271783428] [2022-07-22 21:38:24,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271783428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002768054] [2022-07-22 21:38:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:24,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:24,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:38:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:38:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:25,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002768054] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:25,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:25,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-22 21:38:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907257461] [2022-07-22 21:38:25,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:25,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:38:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:38:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:38:25,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-22 21:38:25,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 695 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:25,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:25,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-22 21:38:25,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:26,018 INFO L129 PetriNetUnfolder]: 191/2490 cut-off events. [2022-07-22 21:38:26,018 INFO L130 PetriNetUnfolder]: For 617/639 co-relation queries the response was YES. [2022-07-22 21:38:26,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 2490 events. 191/2490 cut-off events. For 617/639 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 20934 event pairs, 83 based on Foata normal form. 3/2268 useless extension candidates. Maximal degree in co-relation 3353. Up to 223 conditions per place. [2022-07-22 21:38:26,031 INFO L132 encePairwiseOnDemand]: 239/258 looper letters, 149 selfloop transitions, 25 changer transitions 8/341 dead transitions. [2022-07-22 21:38:26,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 341 transitions, 1339 flow [2022-07-22 21:38:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:38:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:38:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3212 transitions. [2022-07-22 21:38:26,039 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6916451335055986 [2022-07-22 21:38:26,040 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3212 transitions. [2022-07-22 21:38:26,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3212 transitions. [2022-07-22 21:38:26,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:26,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3212 transitions. [2022-07-22 21:38:26,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.44444444444446) internal successors, (3212), 18 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:26,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:26,055 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:26,055 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 695 flow. Second operand 18 states and 3212 transitions. [2022-07-22 21:38:26,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 341 transitions, 1339 flow [2022-07-22 21:38:26,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 341 transitions, 1278 flow, removed 9 selfloop flow, removed 20 redundant places. [2022-07-22 21:38:26,063 INFO L242 Difference]: Finished difference. Result has 275 places, 257 transitions, 777 flow [2022-07-22 21:38:26,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=777, PETRI_PLACES=275, PETRI_TRANSITIONS=257} [2022-07-22 21:38:26,064 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 42 predicate places. [2022-07-22 21:38:26,064 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 257 transitions, 777 flow [2022-07-22 21:38:26,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:26,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:26,065 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:26,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1111966459, now seen corresponding path program 2 times [2022-07-22 21:38:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170798443] [2022-07-22 21:38:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170798443] [2022-07-22 21:38:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170798443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600507931] [2022-07-22 21:38:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:38:26,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:26,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:26,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:38:26,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:38:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:38:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:26,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:38:26,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600507931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:26,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:38:26,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-07-22 21:38:26,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283747623] [2022-07-22 21:38:26,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:26,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:38:26,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:38:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:38:26,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-22 21:38:26,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 257 transitions, 777 flow. Second operand has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:26,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:26,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-22 21:38:26,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:27,490 INFO L129 PetriNetUnfolder]: 221/3054 cut-off events. [2022-07-22 21:38:27,490 INFO L130 PetriNetUnfolder]: For 1334/1384 co-relation queries the response was YES. [2022-07-22 21:38:27,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 3054 events. 221/3054 cut-off events. For 1334/1384 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 30 based on Foata normal form. 15/2795 useless extension candidates. Maximal degree in co-relation 4262. Up to 234 conditions per place. [2022-07-22 21:38:27,507 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 16 changer transitions 12/297 dead transitions. [2022-07-22 21:38:27,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 297 transitions, 1146 flow [2022-07-22 21:38:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:38:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:38:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2705 transitions. [2022-07-22 21:38:27,512 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7488925802879292 [2022-07-22 21:38:27,512 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2705 transitions. [2022-07-22 21:38:27,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2705 transitions. [2022-07-22 21:38:27,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:27,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2705 transitions. [2022-07-22 21:38:27,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.21428571428572) internal successors, (2705), 14 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:27,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:27,530 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:27,530 INFO L186 Difference]: Start difference. First operand has 275 places, 257 transitions, 777 flow. Second operand 14 states and 2705 transitions. [2022-07-22 21:38:27,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 297 transitions, 1146 flow [2022-07-22 21:38:27,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 297 transitions, 1085 flow, removed 21 selfloop flow, removed 9 redundant places. [2022-07-22 21:38:27,538 INFO L242 Difference]: Finished difference. Result has 289 places, 262 transitions, 858 flow [2022-07-22 21:38:27,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=289, PETRI_TRANSITIONS=262} [2022-07-22 21:38:27,541 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 56 predicate places. [2022-07-22 21:38:27,541 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 262 transitions, 858 flow [2022-07-22 21:38:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:27,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:27,542 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:27,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:27,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1904163694, now seen corresponding path program 1 times [2022-07-22 21:38:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752481266] [2022-07-22 21:38:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:27,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752481266] [2022-07-22 21:38:27,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752481266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921648434] [2022-07-22 21:38:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:27,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:27,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:27,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:27,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:38:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:38:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:28,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921648434] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:28,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:28,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-22 21:38:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516011852] [2022-07-22 21:38:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:38:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:38:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:38:28,539 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 258 [2022-07-22 21:38:28,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 262 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:28,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:28,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 258 [2022-07-22 21:38:28,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:29,212 INFO L129 PetriNetUnfolder]: 223/3065 cut-off events. [2022-07-22 21:38:29,212 INFO L130 PetriNetUnfolder]: For 2066/2136 co-relation queries the response was YES. [2022-07-22 21:38:29,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4552 conditions, 3065 events. 223/3065 cut-off events. For 2066/2136 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 26652 event pairs, 91 based on Foata normal form. 7/2789 useless extension candidates. Maximal degree in co-relation 4521. Up to 258 conditions per place. [2022-07-22 21:38:29,231 INFO L132 encePairwiseOnDemand]: 236/258 looper letters, 154 selfloop transitions, 29 changer transitions 4/346 dead transitions. [2022-07-22 21:38:29,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 346 transitions, 1599 flow [2022-07-22 21:38:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:38:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:38:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3546 transitions. [2022-07-22 21:38:29,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6872093023255814 [2022-07-22 21:38:29,237 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3546 transitions. [2022-07-22 21:38:29,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3546 transitions. [2022-07-22 21:38:29,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:29,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3546 transitions. [2022-07-22 21:38:29,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 177.3) internal successors, (3546), 20 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:29,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:29,248 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 258.0) internal successors, (5418), 21 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:29,248 INFO L186 Difference]: Start difference. First operand has 289 places, 262 transitions, 858 flow. Second operand 20 states and 3546 transitions. [2022-07-22 21:38:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 346 transitions, 1599 flow [2022-07-22 21:38:29,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 346 transitions, 1476 flow, removed 54 selfloop flow, removed 11 redundant places. [2022-07-22 21:38:29,258 INFO L242 Difference]: Finished difference. Result has 293 places, 270 transitions, 995 flow [2022-07-22 21:38:29,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=995, PETRI_PLACES=293, PETRI_TRANSITIONS=270} [2022-07-22 21:38:29,259 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 60 predicate places. [2022-07-22 21:38:29,259 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 270 transitions, 995 flow [2022-07-22 21:38:29,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 173.14285714285714) internal successors, (2424), 14 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:29,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:29,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:29,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:29,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1602370668, now seen corresponding path program 1 times [2022-07-22 21:38:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288408121] [2022-07-22 21:38:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288408121] [2022-07-22 21:38:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288408121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477075705] [2022-07-22 21:38:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:29,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:29,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:29,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:38:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:38:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:29,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:30,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477075705] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:30,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:30,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-22 21:38:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309804454] [2022-07-22 21:38:30,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:38:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:38:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:38:30,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-22 21:38:30,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 270 transitions, 995 flow. Second operand has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:30,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:30,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-22 21:38:30,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:30,866 INFO L129 PetriNetUnfolder]: 402/3869 cut-off events. [2022-07-22 21:38:30,866 INFO L130 PetriNetUnfolder]: For 2031/2039 co-relation queries the response was YES. [2022-07-22 21:38:30,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 3869 events. 402/3869 cut-off events. For 2031/2039 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 36099 event pairs, 135 based on Foata normal form. 3/3514 useless extension candidates. Maximal degree in co-relation 5637. Up to 234 conditions per place. [2022-07-22 21:38:30,890 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 106 selfloop transitions, 22 changer transitions 0/326 dead transitions. [2022-07-22 21:38:30,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 326 transitions, 1451 flow [2022-07-22 21:38:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:38:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:38:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3658 transitions. [2022-07-22 21:38:30,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7876830318690784 [2022-07-22 21:38:30,894 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3658 transitions. [2022-07-22 21:38:30,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3658 transitions. [2022-07-22 21:38:30,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:30,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3658 transitions. [2022-07-22 21:38:30,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.22222222222223) internal successors, (3658), 18 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:30,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:30,903 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:30,903 INFO L186 Difference]: Start difference. First operand has 293 places, 270 transitions, 995 flow. Second operand 18 states and 3658 transitions. [2022-07-22 21:38:30,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 326 transitions, 1451 flow [2022-07-22 21:38:30,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 326 transitions, 1386 flow, removed 24 selfloop flow, removed 9 redundant places. [2022-07-22 21:38:30,913 INFO L242 Difference]: Finished difference. Result has 301 places, 276 transitions, 1003 flow [2022-07-22 21:38:30,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1003, PETRI_PLACES=301, PETRI_TRANSITIONS=276} [2022-07-22 21:38:30,914 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-22 21:38:30,914 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 276 transitions, 1003 flow [2022-07-22 21:38:30,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.36363636363637) internal successors, (2204), 11 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:30,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:30,915 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:30,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:31,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1108619878, now seen corresponding path program 1 times [2022-07-22 21:38:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59955320] [2022-07-22 21:38:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:31,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59955320] [2022-07-22 21:38:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59955320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821591773] [2022-07-22 21:38:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:31,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:31,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:31,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:31,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:38:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:38:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:31,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:31,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821591773] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:31,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:31,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-22 21:38:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624192299] [2022-07-22 21:38:31,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:31,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:38:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:38:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-22 21:38:31,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 258 [2022-07-22 21:38:31,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 276 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:31,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:31,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 258 [2022-07-22 21:38:31,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:32,673 INFO L129 PetriNetUnfolder]: 376/4097 cut-off events. [2022-07-22 21:38:32,673 INFO L130 PetriNetUnfolder]: For 2162/2170 co-relation queries the response was YES. [2022-07-22 21:38:32,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6114 conditions, 4097 events. 376/4097 cut-off events. For 2162/2170 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 39381 event pairs, 123 based on Foata normal form. 6/3817 useless extension candidates. Maximal degree in co-relation 6086. Up to 202 conditions per place. [2022-07-22 21:38:32,703 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 112 selfloop transitions, 22 changer transitions 0/335 dead transitions. [2022-07-22 21:38:32,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 335 transitions, 1518 flow [2022-07-22 21:38:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:38:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:38:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3661 transitions. [2022-07-22 21:38:32,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7883290267011197 [2022-07-22 21:38:32,707 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3661 transitions. [2022-07-22 21:38:32,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3661 transitions. [2022-07-22 21:38:32,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:32,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3661 transitions. [2022-07-22 21:38:32,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.38888888888889) internal successors, (3661), 18 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:32,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:32,715 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:32,715 INFO L186 Difference]: Start difference. First operand has 301 places, 276 transitions, 1003 flow. Second operand 18 states and 3661 transitions. [2022-07-22 21:38:32,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 335 transitions, 1518 flow [2022-07-22 21:38:32,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 335 transitions, 1493 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-22 21:38:32,726 INFO L242 Difference]: Finished difference. Result has 310 places, 282 transitions, 1047 flow [2022-07-22 21:38:32,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1047, PETRI_PLACES=310, PETRI_TRANSITIONS=282} [2022-07-22 21:38:32,727 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 77 predicate places. [2022-07-22 21:38:32,727 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 282 transitions, 1047 flow [2022-07-22 21:38:32,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.45454545454547) internal successors, (2205), 11 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:32,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:32,728 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:32,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:32,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2275650, now seen corresponding path program 1 times [2022-07-22 21:38:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526073216] [2022-07-22 21:38:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526073216] [2022-07-22 21:38:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526073216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458387291] [2022-07-22 21:38:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:33,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:33,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:38:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 21:38:33,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:34,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:34,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458387291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:38:34,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:38:34,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2022-07-22 21:38:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686751202] [2022-07-22 21:38:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:38:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 21:38:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 21:38:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 21:38:34,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 258 [2022-07-22 21:38:34,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 282 transitions, 1047 flow. Second operand has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:34,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:34,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 258 [2022-07-22 21:38:34,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:37,008 INFO L129 PetriNetUnfolder]: 396/5497 cut-off events. [2022-07-22 21:38:37,009 INFO L130 PetriNetUnfolder]: For 3865/3969 co-relation queries the response was YES. [2022-07-22 21:38:37,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8530 conditions, 5497 events. 396/5497 cut-off events. For 3865/3969 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 55710 event pairs, 176 based on Foata normal form. 16/5147 useless extension candidates. Maximal degree in co-relation 8500. Up to 580 conditions per place. [2022-07-22 21:38:37,041 INFO L132 encePairwiseOnDemand]: 234/258 looper letters, 223 selfloop transitions, 49 changer transitions 12/447 dead transitions. [2022-07-22 21:38:37,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 447 transitions, 2392 flow [2022-07-22 21:38:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:38:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:38:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5732 transitions. [2022-07-22 21:38:37,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6732440685929058 [2022-07-22 21:38:37,047 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5732 transitions. [2022-07-22 21:38:37,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5732 transitions. [2022-07-22 21:38:37,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:37,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5732 transitions. [2022-07-22 21:38:37,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 173.6969696969697) internal successors, (5732), 33 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:37,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:37,064 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 258.0) internal successors, (8772), 34 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:37,064 INFO L186 Difference]: Start difference. First operand has 310 places, 282 transitions, 1047 flow. Second operand 33 states and 5732 transitions. [2022-07-22 21:38:37,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 447 transitions, 2392 flow [2022-07-22 21:38:37,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 2358 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-22 21:38:37,080 INFO L242 Difference]: Finished difference. Result has 343 places, 309 transitions, 1399 flow [2022-07-22 21:38:37,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1399, PETRI_PLACES=343, PETRI_TRANSITIONS=309} [2022-07-22 21:38:37,081 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 110 predicate places. [2022-07-22 21:38:37,081 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 309 transitions, 1399 flow [2022-07-22 21:38:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 170.09302325581396) internal successors, (7314), 43 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:37,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:37,083 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:37,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:37,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:37,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash 685094907, now seen corresponding path program 1 times [2022-07-22 21:38:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:37,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414607822] [2022-07-22 21:38:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:37,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:37,365 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 21:38:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414607822] [2022-07-22 21:38:37,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414607822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:37,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:37,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:38:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174966532] [2022-07-22 21:38:37,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:37,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:38:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:38:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:38:37,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-22 21:38:37,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 309 transitions, 1399 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:37,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:37,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-22 21:38:37,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:38,164 INFO L129 PetriNetUnfolder]: 582/6515 cut-off events. [2022-07-22 21:38:38,164 INFO L130 PetriNetUnfolder]: For 5388/5422 co-relation queries the response was YES. [2022-07-22 21:38:38,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10345 conditions, 6515 events. 582/6515 cut-off events. For 5388/5422 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 69725 event pairs, 341 based on Foata normal form. 32/6127 useless extension candidates. Maximal degree in co-relation 10304. Up to 986 conditions per place. [2022-07-22 21:38:38,215 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 100 selfloop transitions, 14 changer transitions 2/321 dead transitions. [2022-07-22 21:38:38,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 321 transitions, 1662 flow [2022-07-22 21:38:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:38:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:38:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2065 transitions. [2022-07-22 21:38:38,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003875968992248 [2022-07-22 21:38:38,218 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2065 transitions. [2022-07-22 21:38:38,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2065 transitions. [2022-07-22 21:38:38,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:38,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2065 transitions. [2022-07-22 21:38:38,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.5) internal successors, (2065), 10 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,222 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,222 INFO L186 Difference]: Start difference. First operand has 343 places, 309 transitions, 1399 flow. Second operand 10 states and 2065 transitions. [2022-07-22 21:38:38,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 321 transitions, 1662 flow [2022-07-22 21:38:38,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 321 transitions, 1558 flow, removed 36 selfloop flow, removed 11 redundant places. [2022-07-22 21:38:38,241 INFO L242 Difference]: Finished difference. Result has 339 places, 304 transitions, 1289 flow [2022-07-22 21:38:38,241 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1289, PETRI_PLACES=339, PETRI_TRANSITIONS=304} [2022-07-22 21:38:38,242 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 106 predicate places. [2022-07-22 21:38:38,242 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 304 transitions, 1289 flow [2022-07-22 21:38:38,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:38,242 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:38,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:38:38,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1611315835, now seen corresponding path program 1 times [2022-07-22 21:38:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:38,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654334168] [2022-07-22 21:38:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:38,296 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 21:38:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654334168] [2022-07-22 21:38:38,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654334168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:38,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:38:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930836042] [2022-07-22 21:38:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:38:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:38:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:38:38,299 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-22 21:38:38,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 304 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:38,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-22 21:38:38,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:38,945 INFO L129 PetriNetUnfolder]: 597/5064 cut-off events. [2022-07-22 21:38:38,945 INFO L130 PetriNetUnfolder]: For 3584/3615 co-relation queries the response was YES. [2022-07-22 21:38:38,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8397 conditions, 5064 events. 597/5064 cut-off events. For 3584/3615 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 49103 event pairs, 399 based on Foata normal form. 35/4747 useless extension candidates. Maximal degree in co-relation 8357. Up to 1127 conditions per place. [2022-07-22 21:38:38,972 INFO L132 encePairwiseOnDemand]: 247/258 looper letters, 69 selfloop transitions, 10 changer transitions 38/313 dead transitions. [2022-07-22 21:38:38,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 313 transitions, 1534 flow [2022-07-22 21:38:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:38:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:38:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2063 transitions. [2022-07-22 21:38:38,975 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996124031007752 [2022-07-22 21:38:38,975 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2063 transitions. [2022-07-22 21:38:38,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2063 transitions. [2022-07-22 21:38:38,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:38,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2063 transitions. [2022-07-22 21:38:38,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 206.3) internal successors, (2063), 10 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 258.0) internal successors, (2838), 11 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,979 INFO L186 Difference]: Start difference. First operand has 339 places, 304 transitions, 1289 flow. Second operand 10 states and 2063 transitions. [2022-07-22 21:38:38,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 313 transitions, 1534 flow [2022-07-22 21:38:38,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 313 transitions, 1492 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-07-22 21:38:38,992 INFO L242 Difference]: Finished difference. Result has 340 places, 274 transitions, 1025 flow [2022-07-22 21:38:38,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1025, PETRI_PLACES=340, PETRI_TRANSITIONS=274} [2022-07-22 21:38:38,993 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 107 predicate places. [2022-07-22 21:38:38,993 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 274 transitions, 1025 flow [2022-07-22 21:38:38,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:38,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:38,994 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:38:38,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1329761704, now seen corresponding path program 2 times [2022-07-22 21:38:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044599086] [2022-07-22 21:38:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:39,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044599086] [2022-07-22 21:38:39,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044599086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520026914] [2022-07-22 21:38:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:38:39,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:39,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:39,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:38:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:38:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:38:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 21:38:39,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:38:39,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520026914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:39,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:38:39,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2022-07-22 21:38:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608935370] [2022-07-22 21:38:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:38:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:38:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:38:39,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 258 [2022-07-22 21:38:39,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 274 transitions, 1025 flow. Second operand has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:39,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:39,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 258 [2022-07-22 21:38:39,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:40,407 INFO L129 PetriNetUnfolder]: 289/3868 cut-off events. [2022-07-22 21:38:40,408 INFO L130 PetriNetUnfolder]: For 3003/3102 co-relation queries the response was YES. [2022-07-22 21:38:40,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 3868 events. 289/3868 cut-off events. For 3003/3102 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 35476 event pairs, 30 based on Foata normal form. 33/3649 useless extension candidates. Maximal degree in co-relation 6097. Up to 338 conditions per place. [2022-07-22 21:38:40,438 INFO L132 encePairwiseOnDemand]: 243/258 looper letters, 79 selfloop transitions, 21 changer transitions 12/316 dead transitions. [2022-07-22 21:38:40,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 316 transitions, 1419 flow [2022-07-22 21:38:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:38:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:38:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2704 transitions. [2022-07-22 21:38:40,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7486157253599114 [2022-07-22 21:38:40,441 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2704 transitions. [2022-07-22 21:38:40,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2704 transitions. [2022-07-22 21:38:40,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:40,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2704 transitions. [2022-07-22 21:38:40,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 193.14285714285714) internal successors, (2704), 14 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:40,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:40,449 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:40,449 INFO L186 Difference]: Start difference. First operand has 340 places, 274 transitions, 1025 flow. Second operand 14 states and 2704 transitions. [2022-07-22 21:38:40,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 316 transitions, 1419 flow [2022-07-22 21:38:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 316 transitions, 1296 flow, removed 32 selfloop flow, removed 23 redundant places. [2022-07-22 21:38:40,462 INFO L242 Difference]: Finished difference. Result has 315 places, 277 transitions, 1043 flow [2022-07-22 21:38:40,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1043, PETRI_PLACES=315, PETRI_TRANSITIONS=277} [2022-07-22 21:38:40,464 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 82 predicate places. [2022-07-22 21:38:40,464 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 277 transitions, 1043 flow [2022-07-22 21:38:40,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.83333333333334) internal successors, (2290), 12 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:40,465 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:40,465 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:40,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:40,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash -118345649, now seen corresponding path program 1 times [2022-07-22 21:38:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:40,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86681500] [2022-07-22 21:38:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:40,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86681500] [2022-07-22 21:38:40,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86681500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:40,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:40,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:38:40,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976033240] [2022-07-22 21:38:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:38:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:38:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:38:40,742 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-22 21:38:40,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 277 transitions, 1043 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:40,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:40,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-22 21:38:40,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:41,231 INFO L129 PetriNetUnfolder]: 404/4262 cut-off events. [2022-07-22 21:38:41,231 INFO L130 PetriNetUnfolder]: For 2969/3018 co-relation queries the response was YES. [2022-07-22 21:38:41,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 4262 events. 404/4262 cut-off events. For 2969/3018 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 40782 event pairs, 223 based on Foata normal form. 39/4013 useless extension candidates. Maximal degree in co-relation 6830. Up to 649 conditions per place. [2022-07-22 21:38:41,255 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 76 selfloop transitions, 13 changer transitions 2/288 dead transitions. [2022-07-22 21:38:41,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 288 transitions, 1270 flow [2022-07-22 21:38:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:38:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:38:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2022-07-22 21:38:41,257 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8018410852713178 [2022-07-22 21:38:41,257 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2022-07-22 21:38:41,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2022-07-22 21:38:41,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:41,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2022-07-22 21:38:41,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,261 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,261 INFO L186 Difference]: Start difference. First operand has 315 places, 277 transitions, 1043 flow. Second operand 8 states and 1655 transitions. [2022-07-22 21:38:41,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 288 transitions, 1270 flow [2022-07-22 21:38:41,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 288 transitions, 1204 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-07-22 21:38:41,271 INFO L242 Difference]: Finished difference. Result has 300 places, 275 transitions, 999 flow [2022-07-22 21:38:41,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=300, PETRI_TRANSITIONS=275} [2022-07-22 21:38:41,271 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 67 predicate places. [2022-07-22 21:38:41,272 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 275 transitions, 999 flow [2022-07-22 21:38:41,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:41,272 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:38:41,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1669631243, now seen corresponding path program 1 times [2022-07-22 21:38:41,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005970189] [2022-07-22 21:38:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:41,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:41,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:41,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005970189] [2022-07-22 21:38:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005970189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:41,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:38:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442732566] [2022-07-22 21:38:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:38:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:38:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:38:41,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 258 [2022-07-22 21:38:41,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 275 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:41,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 258 [2022-07-22 21:38:41,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:41,683 INFO L129 PetriNetUnfolder]: 398/3387 cut-off events. [2022-07-22 21:38:41,683 INFO L130 PetriNetUnfolder]: For 2178/2197 co-relation queries the response was YES. [2022-07-22 21:38:41,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 3387 events. 398/3387 cut-off events. For 2178/2197 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 29486 event pairs, 241 based on Foata normal form. 30/3164 useless extension candidates. Maximal degree in co-relation 5587. Up to 724 conditions per place. [2022-07-22 21:38:41,706 INFO L132 encePairwiseOnDemand]: 249/258 looper letters, 63 selfloop transitions, 10 changer transitions 17/282 dead transitions. [2022-07-22 21:38:41,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 282 transitions, 1192 flow [2022-07-22 21:38:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:38:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:38:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1653 transitions. [2022-07-22 21:38:41,708 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8008720930232558 [2022-07-22 21:38:41,708 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1653 transitions. [2022-07-22 21:38:41,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1653 transitions. [2022-07-22 21:38:41,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:41,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1653 transitions. [2022-07-22 21:38:41,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.625) internal successors, (1653), 8 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,711 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,711 INFO L186 Difference]: Start difference. First operand has 300 places, 275 transitions, 999 flow. Second operand 8 states and 1653 transitions. [2022-07-22 21:38:41,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 282 transitions, 1192 flow [2022-07-22 21:38:41,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 282 transitions, 1154 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-22 21:38:41,720 INFO L242 Difference]: Finished difference. Result has 301 places, 263 transitions, 888 flow [2022-07-22 21:38:41,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=301, PETRI_TRANSITIONS=263} [2022-07-22 21:38:41,720 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 68 predicate places. [2022-07-22 21:38:41,721 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 263 transitions, 888 flow [2022-07-22 21:38:41,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:41,721 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:41,721 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:41,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:38:41,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1705634450, now seen corresponding path program 1 times [2022-07-22 21:38:41,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:41,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198635447] [2022-07-22 21:38:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:41,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:41,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198635447] [2022-07-22 21:38:41,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198635447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:41,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:41,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581048829] [2022-07-22 21:38:41,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:41,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:41,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:42,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-22 21:38:42,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 263 transitions, 888 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:42,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:42,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-22 21:38:42,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:46,389 INFO L129 PetriNetUnfolder]: 10589/37010 cut-off events. [2022-07-22 21:38:46,389 INFO L130 PetriNetUnfolder]: For 12303/12327 co-relation queries the response was YES. [2022-07-22 21:38:46,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63314 conditions, 37010 events. 10589/37010 cut-off events. For 12303/12327 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 481444 event pairs, 4993 based on Foata normal form. 7/34606 useless extension candidates. Maximal degree in co-relation 63285. Up to 7885 conditions per place. [2022-07-22 21:38:46,785 INFO L132 encePairwiseOnDemand]: 229/258 looper letters, 189 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2022-07-22 21:38:46,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 425 transitions, 1769 flow [2022-07-22 21:38:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:38:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:38:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3982 transitions. [2022-07-22 21:38:46,790 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7349575489110373 [2022-07-22 21:38:46,790 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3982 transitions. [2022-07-22 21:38:46,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3982 transitions. [2022-07-22 21:38:46,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:46,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3982 transitions. [2022-07-22 21:38:46,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 189.61904761904762) internal successors, (3982), 21 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:46,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:46,799 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 258.0) internal successors, (5676), 22 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:46,799 INFO L186 Difference]: Start difference. First operand has 301 places, 263 transitions, 888 flow. Second operand 21 states and 3982 transitions. [2022-07-22 21:38:46,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 425 transitions, 1769 flow [2022-07-22 21:38:46,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 425 transitions, 1684 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-07-22 21:38:46,845 INFO L242 Difference]: Finished difference. Result has 313 places, 286 transitions, 1032 flow [2022-07-22 21:38:46,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1032, PETRI_PLACES=313, PETRI_TRANSITIONS=286} [2022-07-22 21:38:46,846 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 80 predicate places. [2022-07-22 21:38:46,846 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 286 transitions, 1032 flow [2022-07-22 21:38:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:46,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:46,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:46,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:38:46,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash 963524540, now seen corresponding path program 2 times [2022-07-22 21:38:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:46,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448267234] [2022-07-22 21:38:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:46,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:47,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:47,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448267234] [2022-07-22 21:38:47,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448267234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:47,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:47,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277071911] [2022-07-22 21:38:47,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:47,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:47,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 258 [2022-07-22 21:38:47,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 286 transitions, 1032 flow. Second operand has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:47,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:47,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 258 [2022-07-22 21:38:47,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:56,582 INFO L129 PetriNetUnfolder]: 21696/73389 cut-off events. [2022-07-22 21:38:56,582 INFO L130 PetriNetUnfolder]: For 33451/33502 co-relation queries the response was YES. [2022-07-22 21:38:57,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140592 conditions, 73389 events. 21696/73389 cut-off events. For 33451/33502 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 1038089 event pairs, 10573 based on Foata normal form. 82/70657 useless extension candidates. Maximal degree in co-relation 140557. Up to 15943 conditions per place. [2022-07-22 21:38:57,621 INFO L132 encePairwiseOnDemand]: 228/258 looper letters, 221 selfloop transitions, 62 changer transitions 0/480 dead transitions. [2022-07-22 21:38:57,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 480 transitions, 2314 flow [2022-07-22 21:38:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:38:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:38:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4897 transitions. [2022-07-22 21:38:57,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7300238521168754 [2022-07-22 21:38:57,627 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4897 transitions. [2022-07-22 21:38:57,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4897 transitions. [2022-07-22 21:38:57,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:57,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4897 transitions. [2022-07-22 21:38:57,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 188.34615384615384) internal successors, (4897), 26 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:57,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:57,638 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 258.0) internal successors, (6966), 27 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:57,638 INFO L186 Difference]: Start difference. First operand has 313 places, 286 transitions, 1032 flow. Second operand 26 states and 4897 transitions. [2022-07-22 21:38:57,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 480 transitions, 2314 flow [2022-07-22 21:38:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 480 transitions, 2287 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:38:57,999 INFO L242 Difference]: Finished difference. Result has 342 places, 330 transitions, 1471 flow [2022-07-22 21:38:58,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1471, PETRI_PLACES=342, PETRI_TRANSITIONS=330} [2022-07-22 21:38:58,002 INFO L279 CegarLoopForPetriNet]: 233 programPoint places, 109 predicate places. [2022-07-22 21:38:58,002 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 330 transitions, 1471 flow [2022-07-22 21:38:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.6) internal successors, (3632), 20 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:58,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:58,003 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:38:58,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:38:58,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 281417016, now seen corresponding path program 3 times [2022-07-22 21:38:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187940960] [2022-07-22 21:38:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:58,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187940960] [2022-07-22 21:38:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187940960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32065495] [2022-07-22 21:38:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:38:58,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:38:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:38:58,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:38:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:38:58,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:38:58,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:38:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 21:38:58,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:38:58,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:38:58,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:38:59,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:38:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:38:59,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:38:59,596 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset)))))))) is different from false [2022-07-22 21:38:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:59,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32065495] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:38:59,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:38:59,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 24] total 50 [2022-07-22 21:38:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66531353] [2022-07-22 21:38:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:59,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:38:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:38:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2119, Unknown=1, NotChecked=94, Total=2450 [2022-07-22 21:38:59,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 258 [2022-07-22 21:38:59,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 330 transitions, 1471 flow. Second operand has 10 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:59,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:59,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 258 [2022-07-22 21:38:59,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:59,824 WARN L833 $PredicateComparison]: unable to prove that (and (or (= |c_thread1Thread1of1ForFork1_#t~mem2#1| |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= |c_thread2Thread1of1ForFork0_#t~mem8#1| |c_thread2Thread1of1ForFork0_#t~mem7#1|))) (forall ((v_ArrVal_372 (Array Int Int)) (~a1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_372))) (let ((.cse0 (select .cse3 c_~a2~0.base)) (.cse1 (select .cse3 ~a1~0.base))) (or (not (= (select .cse0 c_~a2~0.offset) (select .cse1 c_~a1~0.offset))) (let ((.cse2 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (= (select .cse0 (+ .cse2 c_~a2~0.offset)) (select .cse1 (+ .cse2 c_~a1~0.offset))))))))) is different from false