./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:16,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:16,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:16,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:16,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:16,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:16,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:16,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:16,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:16,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:16,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:16,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:16,383 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:16,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:16,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:16,386 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:16,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:16,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:16,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:16,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:16,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:16,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:16,390 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:16,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:16,391 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:16,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:16,393 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:16,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:16,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:16,394 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:16,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:16,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:16,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:16,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:16,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:16,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:16,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:16,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:16,397 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:16,398 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2023-11-19 07:56:16,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:16,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:16,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:16,794 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:16,795 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:16,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-19 07:56:20,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:20,255 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:20,255 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-19 07:56:20,267 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/data/af414df09/4a63dc023c2f4818893cbb01e9263d58/FLAGf9d5cd348 [2023-11-19 07:56:20,286 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/data/af414df09/4a63dc023c2f4818893cbb01e9263d58 [2023-11-19 07:56:20,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:20,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:20,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:20,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:20,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:20,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576c64bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20, skipping insertion in model container [2023-11-19 07:56:20,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,342 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:20,599 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-19 07:56:20,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:20,634 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:20,675 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-19 07:56:20,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:20,696 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:20,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20 WrapperNode [2023-11-19 07:56:20,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:20,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:20,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:20,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:20,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,752 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2023-11-19 07:56:20,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:20,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:20,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:20,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:20,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,778 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,786 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:20,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:20,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:20,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:20,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (1/1) ... [2023-11-19 07:56:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:20,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:20,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:56:20,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:56:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:56:20,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:56:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:56:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:56:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:20,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:56:20,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:20,870 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:56:20,983 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:20,985 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:21,334 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:21,348 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:21,348 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:56:21,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:21 BoogieIcfgContainer [2023-11-19 07:56:21,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:21,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:21,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:21,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:21,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:20" (1/3) ... [2023-11-19 07:56:21,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79455013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:21, skipping insertion in model container [2023-11-19 07:56:21,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20" (2/3) ... [2023-11-19 07:56:21,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79455013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:21, skipping insertion in model container [2023-11-19 07:56:21,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:21" (3/3) ... [2023-11-19 07:56:21,369 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-19 07:56:21,377 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:56:21,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:21,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:21,386 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:56:21,550 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:56:21,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 211 transitions, 436 flow [2023-11-19 07:56:21,726 INFO L124 PetriNetUnfolderBase]: 18/209 cut-off events. [2023-11-19 07:56:21,729 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:21,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 18/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 320 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-19 07:56:21,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 211 transitions, 436 flow [2023-11-19 07:56:21,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 200 transitions, 412 flow [2023-11-19 07:56:21,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:21,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 200 transitions, 412 flow [2023-11-19 07:56:21,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 200 transitions, 412 flow [2023-11-19 07:56:21,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 200 transitions, 412 flow [2023-11-19 07:56:21,835 INFO L124 PetriNetUnfolderBase]: 18/200 cut-off events. [2023-11-19 07:56:21,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:21,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 200 events. 18/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 299 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2023-11-19 07:56:21,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 4752 [2023-11-19 07:56:29,065 INFO L134 LiptonReduction]: Checked pairs total: 4551 [2023-11-19 07:56:29,065 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-11-19 07:56:29,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:29,090 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62de7388, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:29,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:56:29,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:29,098 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:56:29,098 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:29,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:29,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:29,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:29,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -709592529, now seen corresponding path program 1 times [2023-11-19 07:56:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754694351] [2023-11-19 07:56:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754694351] [2023-11-19 07:56:29,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754694351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:29,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:29,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882064099] [2023-11-19 07:56:29,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:29,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:29,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 454 [2023-11-19 07:56:29,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:29,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:29,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 454 [2023-11-19 07:56:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:29,787 INFO L124 PetriNetUnfolderBase]: 41/76 cut-off events. [2023-11-19 07:56:29,788 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:56:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-19 07:56:29,790 INFO L140 encePairwiseOnDemand]: 451/454 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-19 07:56:29,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-11-19 07:56:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:56:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2023-11-19 07:56:29,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42143906020558003 [2023-11-19 07:56:29,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2023-11-19 07:56:29,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2023-11-19 07:56:29,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:29,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2023-11-19 07:56:29,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:29,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:29,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:29,833 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 574 transitions. [2023-11-19 07:56:29,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-11-19 07:56:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:56:29,838 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-19 07:56:29,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-19 07:56:29,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:56:29,844 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-19 07:56:29,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:29,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:29,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:29,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:29,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:29,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 117137606, now seen corresponding path program 1 times [2023-11-19 07:56:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555619625] [2023-11-19 07:56:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:30,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555619625] [2023-11-19 07:56:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555619625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:30,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:30,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903456785] [2023-11-19 07:56:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:30,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:30,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:30,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 454 [2023-11-19 07:56:30,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 172.5) internal successors, (1035), 6 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:30,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:30,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 454 [2023-11-19 07:56:30,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:30,980 INFO L124 PetriNetUnfolderBase]: 75/132 cut-off events. [2023-11-19 07:56:30,981 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:56:30,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 132 events. 75/132 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 353 event pairs, 1 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 268. Up to 89 conditions per place. [2023-11-19 07:56:30,983 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-11-19 07:56:30,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 45 transitions, 199 flow [2023-11-19 07:56:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1065 transitions. [2023-11-19 07:56:30,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3909691629955947 [2023-11-19 07:56:30,990 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1065 transitions. [2023-11-19 07:56:30,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1065 transitions. [2023-11-19 07:56:30,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:30,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1065 transitions. [2023-11-19 07:56:30,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.5) internal successors, (1065), 6 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,009 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 1065 transitions. [2023-11-19 07:56:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 45 transitions, 199 flow [2023-11-19 07:56:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 45 transitions, 195 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:31,015 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2023-11-19 07:56:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2023-11-19 07:56:31,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-19 07:56:31,017 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2023-11-19 07:56:31,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.5) internal successors, (1035), 6 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:31,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:31,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:31,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:31,030 INFO L85 PathProgramCache]: Analyzing trace with hash -669840378, now seen corresponding path program 2 times [2023-11-19 07:56:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799060893] [2023-11-19 07:56:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:31,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:31,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799060893] [2023-11-19 07:56:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799060893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:31,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029110920] [2023-11-19 07:56:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:31,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-19 07:56:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-19 07:56:31,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:31,778 INFO L124 PetriNetUnfolderBase]: 85/148 cut-off events. [2023-11-19 07:56:31,778 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-19 07:56:31,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 148 events. 85/148 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 386 event pairs, 10 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 444. Up to 99 conditions per place. [2023-11-19 07:56:31,780 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 32 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2023-11-19 07:56:31,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 50 transitions, 292 flow [2023-11-19 07:56:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1058 transitions. [2023-11-19 07:56:31,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839941262848754 [2023-11-19 07:56:31,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1058 transitions. [2023-11-19 07:56:31,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1058 transitions. [2023-11-19 07:56:31,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:31,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1058 transitions. [2023-11-19 07:56:31,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.33333333333334) internal successors, (1058), 6 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,800 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,800 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 1058 transitions. [2023-11-19 07:56:31,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 50 transitions, 292 flow [2023-11-19 07:56:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 284 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:31,803 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2023-11-19 07:56:31,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-11-19 07:56:31,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-19 07:56:31,805 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2023-11-19 07:56:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:31,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:31,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:31,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:31,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1556749922, now seen corresponding path program 3 times [2023-11-19 07:56:31,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:31,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288729414] [2023-11-19 07:56:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288729414] [2023-11-19 07:56:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288729414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:32,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:32,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181587935] [2023-11-19 07:56:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:32,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 454 [2023-11-19 07:56:32,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:32,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 454 [2023-11-19 07:56:32,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:32,409 INFO L124 PetriNetUnfolderBase]: 86/162 cut-off events. [2023-11-19 07:56:32,410 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-19 07:56:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 162 events. 86/162 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 467 event pairs, 1 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 572. Up to 95 conditions per place. [2023-11-19 07:56:32,412 INFO L140 encePairwiseOnDemand]: 446/454 looper letters, 37 selfloop transitions, 19 changer transitions 2/58 dead transitions. [2023-11-19 07:56:32,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 393 flow [2023-11-19 07:56:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1094 transitions. [2023-11-19 07:56:32,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40161527165932454 [2023-11-19 07:56:32,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1094 transitions. [2023-11-19 07:56:32,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1094 transitions. [2023-11-19 07:56:32,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:32,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1094 transitions. [2023-11-19 07:56:32,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.33333333333334) internal successors, (1094), 6 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,452 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 6 states and 1094 transitions. [2023-11-19 07:56:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 393 flow [2023-11-19 07:56:32,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 58 transitions, 369 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:32,459 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 258 flow [2023-11-19 07:56:32,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-19 07:56:32,462 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-19 07:56:32,462 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 258 flow [2023-11-19 07:56:32,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:32,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:32,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:56:32,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:32,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1324303254, now seen corresponding path program 4 times [2023-11-19 07:56:32,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:32,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280130316] [2023-11-19 07:56:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:32,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:32,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280130316] [2023-11-19 07:56:32,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280130316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:32,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:32,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:32,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161179321] [2023-11-19 07:56:32,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:32,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:32,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:32,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:32,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 454 [2023-11-19 07:56:32,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:32,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:32,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 454 [2023-11-19 07:56:32,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:33,139 INFO L124 PetriNetUnfolderBase]: 82/147 cut-off events. [2023-11-19 07:56:33,139 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2023-11-19 07:56:33,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 147 events. 82/147 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 404 event pairs, 1 based on Foata normal form. 4/130 useless extension candidates. Maximal degree in co-relation 565. Up to 98 conditions per place. [2023-11-19 07:56:33,142 INFO L140 encePairwiseOnDemand]: 447/454 looper letters, 35 selfloop transitions, 18 changer transitions 0/53 dead transitions. [2023-11-19 07:56:33,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 395 flow [2023-11-19 07:56:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:56:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1060 transitions. [2023-11-19 07:56:33,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891336270190896 [2023-11-19 07:56:33,147 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1060 transitions. [2023-11-19 07:56:33,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1060 transitions. [2023-11-19 07:56:33,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:33,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1060 transitions. [2023-11-19 07:56:33,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:33,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:33,158 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:33,158 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 258 flow. Second operand 6 states and 1060 transitions. [2023-11-19 07:56:33,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 395 flow [2023-11-19 07:56:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 371 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:56:33,166 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 277 flow [2023-11-19 07:56:33,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-19 07:56:33,168 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-19 07:56:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 277 flow [2023-11-19 07:56:33,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:33,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:33,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:56:33,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:33,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1302635166, now seen corresponding path program 5 times [2023-11-19 07:56:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121846530] [2023-11-19 07:56:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:33,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:33,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121846530] [2023-11-19 07:56:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121846530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:33,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:56:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536665981] [2023-11-19 07:56:33,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 454 [2023-11-19 07:56:33,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 174.5) internal successors, (1047), 6 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:33,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:33,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 454 [2023-11-19 07:56:33,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:34,003 INFO L124 PetriNetUnfolderBase]: 101/189 cut-off events. [2023-11-19 07:56:34,003 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2023-11-19 07:56:34,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 189 events. 101/189 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 576 event pairs, 4 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 712. Up to 67 conditions per place. [2023-11-19 07:56:34,006 INFO L140 encePairwiseOnDemand]: 446/454 looper letters, 39 selfloop transitions, 24 changer transitions 2/65 dead transitions. [2023-11-19 07:56:34,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 488 flow [2023-11-19 07:56:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:56:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:56:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1432 transitions. [2023-11-19 07:56:34,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.394273127753304 [2023-11-19 07:56:34,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1432 transitions. [2023-11-19 07:56:34,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1432 transitions. [2023-11-19 07:56:34,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:34,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1432 transitions. [2023-11-19 07:56:34,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:34,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:34,028 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:34,028 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 277 flow. Second operand 8 states and 1432 transitions. [2023-11-19 07:56:34,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 488 flow [2023-11-19 07:56:34,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 452 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-19 07:56:34,033 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 344 flow [2023-11-19 07:56:34,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-19 07:56:34,034 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-11-19 07:56:34,034 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 344 flow [2023-11-19 07:56:34,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 174.5) internal successors, (1047), 6 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:34,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:34,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:34,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:56:34,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:34,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 403550862, now seen corresponding path program 1 times [2023-11-19 07:56:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:34,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143133958] [2023-11-19 07:56:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143133958] [2023-11-19 07:56:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143133958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474878121] [2023-11-19 07:56:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:34,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:34,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:34,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:34,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:56:34,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:34,609 INFO L378 Elim1Store]: Elim1 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 15 treesize of output 1 [2023-11-19 07:56:34,674 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-19 07:56:34,726 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-19 07:56:35,119 INFO L349 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-11-19 07:56:35,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 253 treesize of output 182 [2023-11-19 07:56:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:35,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:37,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:56:37,654 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 444 treesize of output 264 [2023-11-19 07:56:37,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:56:37,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 728 treesize of output 684 [2023-11-19 07:56:37,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:56:37,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 744 treesize of output 564 [2023-11-19 07:56:38,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:56:38,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 261 [2023-11-19 07:56:49,216 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:56:49,217 INFO L378 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 1 [2023-11-19 07:56:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:49,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474878121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:49,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:49,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-19 07:56:49,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756726724] [2023-11-19 07:56:49,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:49,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2023-11-19 07:56:51,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:56:53,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 454 [2023-11-19 07:56:53,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 344 flow. Second operand has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:53,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 454 [2023-11-19 07:56:53,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:55,794 INFO L124 PetriNetUnfolderBase]: 327/594 cut-off events. [2023-11-19 07:56:55,794 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2023-11-19 07:56:55,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 594 events. 327/594 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2586 event pairs, 26 based on Foata normal form. 6/528 useless extension candidates. Maximal degree in co-relation 2008. Up to 213 conditions per place. [2023-11-19 07:56:55,800 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 73 selfloop transitions, 45 changer transitions 66/184 dead transitions. [2023-11-19 07:56:55,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 184 transitions, 1437 flow [2023-11-19 07:56:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:56:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:56:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2986 transitions. [2023-11-19 07:56:55,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26308370044052865 [2023-11-19 07:56:55,818 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2986 transitions. [2023-11-19 07:56:55,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2986 transitions. [2023-11-19 07:56:55,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:55,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2986 transitions. [2023-11-19 07:56:55,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 119.44) internal successors, (2986), 25 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,857 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 454.0) internal successors, (11804), 26 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,857 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 344 flow. Second operand 25 states and 2986 transitions. [2023-11-19 07:56:55,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 184 transitions, 1437 flow [2023-11-19 07:56:55,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 184 transitions, 1257 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-11-19 07:56:55,871 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 555 flow [2023-11-19 07:56:55,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=555, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2023-11-19 07:56:55,872 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-11-19 07:56:55,872 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 555 flow [2023-11-19 07:56:55,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:55,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:55,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:56,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:56,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:56,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash -358170831, now seen corresponding path program 1 times [2023-11-19 07:56:56,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:56,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616825649] [2023-11-19 07:56:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:56,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616825649] [2023-11-19 07:56:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616825649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350101939] [2023-11-19 07:56:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:56,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:56,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:56,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:56,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-19 07:56:56,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:56,510 INFO L378 Elim1Store]: Elim1 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 15 treesize of output 1 [2023-11-19 07:56:56,587 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-19 07:56:56,628 INFO L378 Elim1Store]: Elim1 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 8 treesize of output 1 [2023-11-19 07:56:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:56,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350101939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:57,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:57,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6] total 19 [2023-11-19 07:56:57,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913286296] [2023-11-19 07:56:57,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:56:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:56:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:57:00,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 454 [2023-11-19 07:57:00,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 555 flow. Second operand has 19 states, 19 states have (on average 153.05263157894737) internal successors, (2908), 19 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:00,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:00,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 454 [2023-11-19 07:57:00,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:03,489 INFO L124 PetriNetUnfolderBase]: 442/845 cut-off events. [2023-11-19 07:57:03,489 INFO L125 PetriNetUnfolderBase]: For 2650/2650 co-relation queries the response was YES. [2023-11-19 07:57:03,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4027 conditions, 845 events. 442/845 cut-off events. For 2650/2650 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4311 event pairs, 16 based on Foata normal form. 18/861 useless extension candidates. Maximal degree in co-relation 3929. Up to 237 conditions per place. [2023-11-19 07:57:03,500 INFO L140 encePairwiseOnDemand]: 443/454 looper letters, 120 selfloop transitions, 87 changer transitions 12/219 dead transitions. [2023-11-19 07:57:03,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 219 transitions, 1898 flow [2023-11-19 07:57:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:57:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:57:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4101 transitions. [2023-11-19 07:57:03,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34742460182988816 [2023-11-19 07:57:03,517 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4101 transitions. [2023-11-19 07:57:03,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4101 transitions. [2023-11-19 07:57:03,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:03,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4101 transitions. [2023-11-19 07:57:03,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 157.73076923076923) internal successors, (4101), 26 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:03,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 454.0) internal successors, (12258), 27 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:03,559 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 454.0) internal successors, (12258), 27 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:03,560 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 555 flow. Second operand 26 states and 4101 transitions. [2023-11-19 07:57:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 219 transitions, 1898 flow [2023-11-19 07:57:03,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 219 transitions, 1737 flow, removed 62 selfloop flow, removed 10 redundant places. [2023-11-19 07:57:03,580 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1265 flow [2023-11-19 07:57:03,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1265, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2023-11-19 07:57:03,581 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2023-11-19 07:57:03,582 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1265 flow [2023-11-19 07:57:03,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.05263157894737) internal successors, (2908), 19 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:03,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:03,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:03,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af0d42d4-7e9e-4daf-973f-b7c1d95a8d93/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0