./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/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_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/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_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:19,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:19,972 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:19,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:19,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:20,021 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:20,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:20,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:20,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:20,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:20,030 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:20,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:20,031 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:20,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:20,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:20,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:20,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:20,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:20,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:20,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:20,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:20,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:20,037 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:20,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:20,038 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:20,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:20,040 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:20,040 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:20,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:20,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:20,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:20,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:20,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:20,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:20,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:20,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:20,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:20,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:20,045 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:20,045 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_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2023-11-19 07:41:20,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:20,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:20,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:20,443 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:20,443 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:20,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/clever.wvr.c [2023-11-19 07:41:23,590 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:23,866 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:23,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/sv-benchmarks/c/weaver/clever.wvr.c [2023-11-19 07:41:23,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/data/1326ded3b/767a0b02177a458f968db0fb7c5c7989/FLAG033e1c641 [2023-11-19 07:41:23,887 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/data/1326ded3b/767a0b02177a458f968db0fb7c5c7989 [2023-11-19 07:41:23,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:23,891 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:23,893 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:23,893 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:23,899 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:23,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:23" (1/1) ... [2023-11-19 07:41:23,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f0bbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:23, skipping insertion in model container [2023-11-19 07:41:23,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:23" (1/1) ... [2023-11-19 07:41:23,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:24,135 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_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-19 07:41:24,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:24,151 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:24,183 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_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-19 07:41:24,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:24,197 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:24,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24 WrapperNode [2023-11-19 07:41:24,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:24,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:24,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:24,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:24,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,236 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-11-19 07:41:24,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:24,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:24,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:24,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:24,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,251 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:24,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:24,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:24,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:24,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (1/1) ... [2023-11-19 07:41:24,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:24,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:24,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:24,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:24,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:24,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:41:24,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:41:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:41:24,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:41:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:24,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:24,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:24,357 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 07:41:24,453 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:24,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:24,701 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:24,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:24,713 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:41:24,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:24 BoogieIcfgContainer [2023-11-19 07:41:24,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:24,720 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:24,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:24,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:24,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:23" (1/3) ... [2023-11-19 07:41:24,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a94222e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:24, skipping insertion in model container [2023-11-19 07:41:24,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:24" (2/3) ... [2023-11-19 07:41:24,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a94222e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:24, skipping insertion in model container [2023-11-19 07:41:24,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:24" (3/3) ... [2023-11-19 07:41:24,728 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-11-19 07:41:24,737 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:41:24,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:24,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:24,749 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:41:24,856 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:41:24,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 266 flow [2023-11-19 07:41:24,977 INFO L124 PetriNetUnfolderBase]: 9/124 cut-off events. [2023-11-19 07:41:24,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-19 07:41:24,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 266 flow [2023-11-19 07:41:24,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 115 transitions, 242 flow [2023-11-19 07:41:24,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:25,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 115 transitions, 242 flow [2023-11-19 07:41:25,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 115 transitions, 242 flow [2023-11-19 07:41:25,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 242 flow [2023-11-19 07:41:25,076 INFO L124 PetriNetUnfolderBase]: 9/115 cut-off events. [2023-11-19 07:41:25,076 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:25,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-19 07:41:25,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 842 [2023-11-19 07:41:28,987 INFO L134 LiptonReduction]: Checked pairs total: 820 [2023-11-19 07:41:28,987 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-19 07:41:29,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:29,022 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;@45485218, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:29,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:41:29,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:29,038 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:41:29,039 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:41:29,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:29,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:29,041 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 07:41:29,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash 87805163, now seen corresponding path program 1 times [2023-11-19 07:41:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697684923] [2023-11-19 07:41:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,639 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 07:41:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697684923] [2023-11-19 07:41:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697684923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:29,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:29,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:41:29,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469692847] [2023-11-19 07:41:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:29,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 237 [2023-11-19 07:41:29,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 07:41:29,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:29,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 237 [2023-11-19 07:41:29,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:29,870 INFO L124 PetriNetUnfolderBase]: 112/181 cut-off events. [2023-11-19 07:41:29,870 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-19 07:41:29,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 181 events. 112/181 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 551 event pairs, 20 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 318. Up to 118 conditions per place. [2023-11-19 07:41:29,876 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-19 07:41:29,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 133 flow [2023-11-19 07:41:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-11-19 07:41:29,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49929676511954996 [2023-11-19 07:41:29,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-11-19 07:41:29,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-11-19 07:41:29,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-11-19 07:41:29,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 07:41:29,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:41:29,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 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 07:41:29,932 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 355 transitions. [2023-11-19 07:41:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 133 flow [2023-11-19 07:41:29,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:41:29,938 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-19 07:41:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-19 07:41:29,945 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:41:29,946 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-19 07:41:29,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 07:41:29,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:29,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:29,948 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 07:41:29,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:29,950 INFO L85 PathProgramCache]: Analyzing trace with hash -855904466, now seen corresponding path program 1 times [2023-11-19 07:41:29,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:29,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668665914] [2023-11-19 07:41:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668665914] [2023-11-19 07:41:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668665914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:30,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:30,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940200518] [2023-11-19 07:41:30,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:30,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:30,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:30,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 237 [2023-11-19 07:41:30,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 07:41:30,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:30,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 237 [2023-11-19 07:41:30,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:30,357 INFO L124 PetriNetUnfolderBase]: 152/263 cut-off events. [2023-11-19 07:41:30,358 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-19 07:41:30,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 263 events. 152/263 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 898 event pairs, 18 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 204. Up to 173 conditions per place. [2023-11-19 07:41:30,363 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 35 selfloop transitions, 6 changer transitions 8/51 dead transitions. [2023-11-19 07:41:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 51 transitions, 247 flow [2023-11-19 07:41:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:41:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:41:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-11-19 07:41:30,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810126582278481 [2023-11-19 07:41:30,369 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-11-19 07:41:30,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-11-19 07:41:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:30,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-11-19 07:41:30,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 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 07:41:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:30,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:30,381 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 570 transitions. [2023-11-19 07:41:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 51 transitions, 247 flow [2023-11-19 07:41:30,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 51 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:30,388 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 103 flow [2023-11-19 07:41:30,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-19 07:41:30,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-11-19 07:41:30,390 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 103 flow [2023-11-19 07:41:30,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 07:41:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:30,391 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 07:41:30,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1214870514, now seen corresponding path program 2 times [2023-11-19 07:41:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251967915] [2023-11-19 07:41:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251967915] [2023-11-19 07:41:30,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251967915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:30,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:30,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:30,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715137527] [2023-11-19 07:41:30,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:30,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:30,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 237 [2023-11-19 07:41:30,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 07:41:30,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:30,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 237 [2023-11-19 07:41:30,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:30,742 INFO L124 PetriNetUnfolderBase]: 131/216 cut-off events. [2023-11-19 07:41:30,742 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-19 07:41:30,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 216 events. 131/216 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 642 event pairs, 20 based on Foata normal form. 8/221 useless extension candidates. Maximal degree in co-relation 206. Up to 157 conditions per place. [2023-11-19 07:41:30,749 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 29 selfloop transitions, 7 changer transitions 5/43 dead transitions. [2023-11-19 07:41:30,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 251 flow [2023-11-19 07:41:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:41:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:41:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-11-19 07:41:30,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4759493670886076 [2023-11-19 07:41:30,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-11-19 07:41:30,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-11-19 07:41:30,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:30,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-11-19 07:41:30,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 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 07:41:30,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:30,761 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:30,761 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 103 flow. Second operand 5 states and 564 transitions. [2023-11-19 07:41:30,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 251 flow [2023-11-19 07:41:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:30,766 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 131 flow [2023-11-19 07:41:30,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-19 07:41:30,768 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-11-19 07:41:30,771 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 131 flow [2023-11-19 07:41:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 07:41:30,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:30,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:30,774 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 07:41:30,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash -233199376, now seen corresponding path program 1 times [2023-11-19 07:41:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173874645] [2023-11-19 07:41:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,920 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 07:41:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173874645] [2023-11-19 07:41:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173874645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817530801] [2023-11-19 07:41:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:30,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:31,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:41:31,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:31,172 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 07:41:31,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:31,219 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 07:41:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817530801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:31,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:31,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-19 07:41:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786281351] [2023-11-19 07:41:31,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:31,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:31,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:31,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-19 07:41:31,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:31,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:31,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-19 07:41:31,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:31,371 INFO L124 PetriNetUnfolderBase]: 108/177 cut-off events. [2023-11-19 07:41:31,371 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-11-19 07:41:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 177 events. 108/177 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 459 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 291. Up to 91 conditions per place. [2023-11-19 07:41:31,375 INFO L140 encePairwiseOnDemand]: 232/237 looper letters, 31 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-11-19 07:41:31,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 268 flow [2023-11-19 07:41:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:41:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:41:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 550 transitions. [2023-11-19 07:41:31,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641350210970464 [2023-11-19 07:41:31,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 550 transitions. [2023-11-19 07:41:31,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 550 transitions. [2023-11-19 07:41:31,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 550 transitions. [2023-11-19 07:41:31,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:31,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:31,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 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 07:41:31,387 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 131 flow. Second operand 5 states and 550 transitions. [2023-11-19 07:41:31,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 268 flow [2023-11-19 07:41:31,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:31,392 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 148 flow [2023-11-19 07:41:31,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-19 07:41:31,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-19 07:41:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 148 flow [2023-11-19 07:41:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:31,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:31,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:31,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:41:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:31,611 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 07:41:31,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1933809968, now seen corresponding path program 1 times [2023-11-19 07:41:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567691637] [2023-11-19 07:41:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:32,060 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 07:41:32,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:32,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567691637] [2023-11-19 07:41:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567691637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:32,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663093371] [2023-11-19 07:41:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:32,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:32,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:32,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:32,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:32,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:32,398 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 07:41:32,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:32,553 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 07:41:32,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663093371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:32,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:32,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-19 07:41:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739872307] [2023-11-19 07:41:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:32,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:41:32,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-19 07:41:32,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 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 07:41:32,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:32,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-19 07:41:32,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:33,201 INFO L124 PetriNetUnfolderBase]: 232/379 cut-off events. [2023-11-19 07:41:33,202 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-19 07:41:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 379 events. 232/379 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1282 event pairs, 20 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 566. Up to 189 conditions per place. [2023-11-19 07:41:33,208 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 56 selfloop transitions, 20 changer transitions 5/83 dead transitions. [2023-11-19 07:41:33,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 572 flow [2023-11-19 07:41:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:41:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:41:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 956 transitions. [2023-11-19 07:41:33,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481950304735115 [2023-11-19 07:41:33,216 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 956 transitions. [2023-11-19 07:41:33,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 956 transitions. [2023-11-19 07:41:33,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:33,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 956 transitions. [2023-11-19 07:41:33,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 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 07:41:33,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 237.0) internal successors, (2370), 10 states have internal predecessors, (2370), 0 states have call successors, (0), 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 07:41:33,227 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 237.0) internal successors, (2370), 10 states have internal predecessors, (2370), 0 states have call successors, (0), 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 07:41:33,228 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 148 flow. Second operand 9 states and 956 transitions. [2023-11-19 07:41:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 572 flow [2023-11-19 07:41:33,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 83 transitions, 554 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:41:33,240 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 320 flow [2023-11-19 07:41:33,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=320, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-11-19 07:41:33,244 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-19 07:41:33,244 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 320 flow [2023-11-19 07:41:33,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 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 07:41:33,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:33,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:33,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,461 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 07:41:33,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1861289338, now seen corresponding path program 2 times [2023-11-19 07:41:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336403135] [2023-11-19 07:41:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,771 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 07:41:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336403135] [2023-11-19 07:41:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336403135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357561252] [2023-11-19 07:41:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:33,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:33,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:33,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:33,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:33,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:34,093 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 07:41:34,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:36,280 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 07:41:36,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357561252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:36,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:36,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-19 07:41:36,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548194112] [2023-11-19 07:41:36,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:36,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2023-11-19 07:41:38,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:40,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:42,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:44,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:46,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:48,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:50,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:41:50,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 237 [2023-11-19 07:41:50,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 92.84615384615384) internal successors, (1207), 13 states have internal predecessors, (1207), 0 states have call successors, (0), 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 07:41:50,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:50,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 237 [2023-11-19 07:41:50,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:51,468 INFO L124 PetriNetUnfolderBase]: 601/985 cut-off events. [2023-11-19 07:41:51,468 INFO L125 PetriNetUnfolderBase]: For 1821/1821 co-relation queries the response was YES. [2023-11-19 07:41:51,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4195 conditions, 985 events. 601/985 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4254 event pairs, 42 based on Foata normal form. 5/988 useless extension candidates. Maximal degree in co-relation 3691. Up to 525 conditions per place. [2023-11-19 07:41:51,481 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 101 selfloop transitions, 54 changer transitions 7/164 dead transitions. [2023-11-19 07:41:51,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 164 transitions, 1331 flow [2023-11-19 07:41:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:41:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:41:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1485 transitions. [2023-11-19 07:41:51,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177215189873418 [2023-11-19 07:41:51,489 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1485 transitions. [2023-11-19 07:41:51,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1485 transitions. [2023-11-19 07:41:51,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:51,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1485 transitions. [2023-11-19 07:41:51,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 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 07:41:51,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 237.0) internal successors, (3792), 16 states have internal predecessors, (3792), 0 states have call successors, (0), 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 07:41:51,505 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 237.0) internal successors, (3792), 16 states have internal predecessors, (3792), 0 states have call successors, (0), 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 07:41:51,505 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 320 flow. Second operand 15 states and 1485 transitions. [2023-11-19 07:41:51,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 164 transitions, 1331 flow [2023-11-19 07:41:51,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 164 transitions, 1276 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:51,521 INFO L231 Difference]: Finished difference. Result has 64 places, 83 transitions, 842 flow [2023-11-19 07:41:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=842, PETRI_PLACES=64, PETRI_TRANSITIONS=83} [2023-11-19 07:41:51,524 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-11-19 07:41:51,524 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 83 transitions, 842 flow [2023-11-19 07:41:51,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 92.84615384615384) internal successors, (1207), 13 states have internal predecessors, (1207), 0 states have call successors, (0), 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 07:41:51,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:51,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:51,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:51,739 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 07:41:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1444808880, now seen corresponding path program 3 times [2023-11-19 07:41:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:51,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404407003] [2023-11-19 07:41:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,099 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 07:41:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404407003] [2023-11-19 07:41:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404407003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621848927] [2023-11-19 07:41:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:52,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:52,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:52,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:41:52,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:52,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:41:52,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:52,423 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 07:41:52,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:52,615 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 07:41:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621848927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:52,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-19 07:41:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884057140] [2023-11-19 07:41:52,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:52,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:41:53,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-19 07:41:53,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 83 transitions, 842 flow. Second operand has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 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 07:41:53,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:53,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-19 07:41:53,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:53,922 INFO L124 PetriNetUnfolderBase]: 916/1490 cut-off events. [2023-11-19 07:41:53,922 INFO L125 PetriNetUnfolderBase]: For 6486/6486 co-relation queries the response was YES. [2023-11-19 07:41:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7854 conditions, 1490 events. 916/1490 cut-off events. For 6486/6486 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7107 event pairs, 134 based on Foata normal form. 4/1492 useless extension candidates. Maximal degree in co-relation 7198. Up to 805 conditions per place. [2023-11-19 07:41:53,951 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 88 selfloop transitions, 75 changer transitions 5/170 dead transitions. [2023-11-19 07:41:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 170 transitions, 1871 flow [2023-11-19 07:41:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:41:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:41:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1061 transitions. [2023-11-19 07:41:53,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476793248945148 [2023-11-19 07:41:53,957 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1061 transitions. [2023-11-19 07:41:53,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1061 transitions. [2023-11-19 07:41:53,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:53,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1061 transitions. [2023-11-19 07:41:53,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.1) internal successors, (1061), 10 states have internal predecessors, (1061), 0 states have call successors, (0), 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 07:41:53,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 237.0) internal successors, (2607), 11 states have internal predecessors, (2607), 0 states have call successors, (0), 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 07:41:53,968 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 237.0) internal successors, (2607), 11 states have internal predecessors, (2607), 0 states have call successors, (0), 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 07:41:53,968 INFO L175 Difference]: Start difference. First operand has 64 places, 83 transitions, 842 flow. Second operand 10 states and 1061 transitions. [2023-11-19 07:41:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 170 transitions, 1871 flow [2023-11-19 07:41:53,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 170 transitions, 1714 flow, removed 75 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:54,004 INFO L231 Difference]: Finished difference. Result has 75 places, 120 transitions, 1374 flow [2023-11-19 07:41:54,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=75, PETRI_TRANSITIONS=120} [2023-11-19 07:41:54,006 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-19 07:41:54,006 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 120 transitions, 1374 flow [2023-11-19 07:41:54,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 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 07:41:54,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:54,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:54,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:54,221 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 07:41:54,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1216544456, now seen corresponding path program 1 times [2023-11-19 07:41:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956132672] [2023-11-19 07:41:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956132672] [2023-11-19 07:41:54,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956132672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724184337] [2023-11-19 07:41:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:54,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:54,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:54,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:41:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:41:54,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:55,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724184337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:55,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:55,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-19 07:41:55,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508113217] [2023-11-19 07:41:55,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:56,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-19 07:41:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 120 transitions, 1374 flow. Second operand has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 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 07:41:56,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:56,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-19 07:41:56,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:00,146 INFO L124 PetriNetUnfolderBase]: 1445/2343 cut-off events. [2023-11-19 07:42:00,147 INFO L125 PetriNetUnfolderBase]: For 14223/14223 co-relation queries the response was YES. [2023-11-19 07:42:00,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13391 conditions, 2343 events. 1445/2343 cut-off events. For 14223/14223 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12370 event pairs, 76 based on Foata normal form. 10/2351 useless extension candidates. Maximal degree in co-relation 12310. Up to 1243 conditions per place. [2023-11-19 07:42:00,182 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 212 selfloop transitions, 155 changer transitions 6/375 dead transitions. [2023-11-19 07:42:00,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 375 transitions, 4247 flow [2023-11-19 07:42:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 07:42:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-19 07:42:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3277 transitions. [2023-11-19 07:42:00,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446032394174493 [2023-11-19 07:42:00,198 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3277 transitions. [2023-11-19 07:42:00,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3277 transitions. [2023-11-19 07:42:00,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:00,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3277 transitions. [2023-11-19 07:42:00,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.70967741935483) internal successors, (3277), 31 states have internal predecessors, (3277), 0 states have call successors, (0), 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 07:42:00,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 237.0) internal successors, (7584), 32 states have internal predecessors, (7584), 0 states have call successors, (0), 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 07:42:00,232 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 237.0) internal successors, (7584), 32 states have internal predecessors, (7584), 0 states have call successors, (0), 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 07:42:00,232 INFO L175 Difference]: Start difference. First operand has 75 places, 120 transitions, 1374 flow. Second operand 31 states and 3277 transitions. [2023-11-19 07:42:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 375 transitions, 4247 flow [2023-11-19 07:42:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 375 transitions, 4115 flow, removed 54 selfloop flow, removed 6 redundant places. [2023-11-19 07:42:00,295 INFO L231 Difference]: Finished difference. Result has 103 places, 233 transitions, 3252 flow [2023-11-19 07:42:00,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3252, PETRI_PLACES=103, PETRI_TRANSITIONS=233} [2023-11-19 07:42:00,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-11-19 07:42:00,298 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 233 transitions, 3252 flow [2023-11-19 07:42:00,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 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 07:42:00,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:00,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:00,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:00,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:00,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:42:00,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:00,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1509489568, now seen corresponding path program 2 times [2023-11-19 07:42:00,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:00,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627878710] [2023-11-19 07:42:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:00,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:01,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627878710] [2023-11-19 07:42:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627878710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882975498] [2023-11-19 07:42:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:01,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:01,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:01,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:42:01,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:01,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:42:01,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:42:01,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:42:02,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882975498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:02,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-11-19 07:42:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126851056] [2023-11-19 07:42:02,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:02,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:42:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:42:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:42:03,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-19 07:42:03,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 233 transitions, 3252 flow. Second operand has 17 states, 17 states have (on average 100.52941176470588) internal successors, (1709), 17 states have internal predecessors, (1709), 0 states have call successors, (0), 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 07:42:03,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:03,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-19 07:42:03,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:06,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:42:09,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 07:42:11,653 INFO L124 PetriNetUnfolderBase]: 2087/3418 cut-off events. [2023-11-19 07:42:11,653 INFO L125 PetriNetUnfolderBase]: For 24156/24156 co-relation queries the response was YES. [2023-11-19 07:42:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20968 conditions, 3418 events. 2087/3418 cut-off events. For 24156/24156 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19265 event pairs, 272 based on Foata normal form. 25/3441 useless extension candidates. Maximal degree in co-relation 19885. Up to 2210 conditions per place. [2023-11-19 07:42:11,706 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 311 selfloop transitions, 139 changer transitions 9/461 dead transitions. [2023-11-19 07:42:11,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 461 transitions, 6585 flow [2023-11-19 07:42:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:42:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:42:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2650 transitions. [2023-11-19 07:42:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472573839662447 [2023-11-19 07:42:11,717 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2650 transitions. [2023-11-19 07:42:11,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2650 transitions. [2023-11-19 07:42:11,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:11,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2650 transitions. [2023-11-19 07:42:11,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 106.0) internal successors, (2650), 25 states have internal predecessors, (2650), 0 states have call successors, (0), 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 07:42:11,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 237.0) internal successors, (6162), 26 states have internal predecessors, (6162), 0 states have call successors, (0), 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 07:42:11,742 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 237.0) internal successors, (6162), 26 states have internal predecessors, (6162), 0 states have call successors, (0), 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 07:42:11,742 INFO L175 Difference]: Start difference. First operand has 103 places, 233 transitions, 3252 flow. Second operand 25 states and 2650 transitions. [2023-11-19 07:42:11,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 461 transitions, 6585 flow [2023-11-19 07:42:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 461 transitions, 5186 flow, removed 675 selfloop flow, removed 6 redundant places. [2023-11-19 07:42:11,938 INFO L231 Difference]: Finished difference. Result has 135 places, 335 transitions, 4330 flow [2023-11-19 07:42:11,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4330, PETRI_PLACES=135, PETRI_TRANSITIONS=335} [2023-11-19 07:42:11,939 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-19 07:42:11,940 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 335 transitions, 4330 flow [2023-11-19 07:42:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.52941176470588) internal successors, (1709), 17 states have internal predecessors, (1709), 0 states have call successors, (0), 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 07:42:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:11,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:11,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:12,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:42:12,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1006340368, now seen corresponding path program 3 times [2023-11-19 07:42:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678370420] [2023-11-19 07:42:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678370420] [2023-11-19 07:42:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678370420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94083827] [2023-11-19 07:42:12,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:42:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:12,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:12,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:42:12,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:42:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:12,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:42:12,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:12,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:12,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94083827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:12,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:12,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-19 07:42:12,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627126474] [2023-11-19 07:42:12,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:42:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:42:12,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:42:12,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-19 07:42:12,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 335 transitions, 4330 flow. Second operand has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 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 07:42:12,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:12,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-19 07:42:12,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:42:14,421 INFO L124 PetriNetUnfolderBase]: 3629/6056 cut-off events. [2023-11-19 07:42:14,421 INFO L125 PetriNetUnfolderBase]: For 42708/42708 co-relation queries the response was YES. [2023-11-19 07:42:14,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33428 conditions, 6056 events. 3629/6056 cut-off events. For 42708/42708 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 39260 event pairs, 83 based on Foata normal form. 88/6141 useless extension candidates. Maximal degree in co-relation 32294. Up to 3159 conditions per place. [2023-11-19 07:42:14,568 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 674 selfloop transitions, 296 changer transitions 16/988 dead transitions. [2023-11-19 07:42:14,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 988 transitions, 13762 flow [2023-11-19 07:42:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:42:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:42:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1325 transitions. [2023-11-19 07:42:14,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658931082981716 [2023-11-19 07:42:14,573 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1325 transitions. [2023-11-19 07:42:14,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1325 transitions. [2023-11-19 07:42:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:42:14,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1325 transitions. [2023-11-19 07:42:14,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 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 07:42:14,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 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 07:42:14,607 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 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 07:42:14,607 INFO L175 Difference]: Start difference. First operand has 135 places, 335 transitions, 4330 flow. Second operand 12 states and 1325 transitions. [2023-11-19 07:42:14,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 988 transitions, 13762 flow [2023-11-19 07:42:14,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 988 transitions, 12929 flow, removed 400 selfloop flow, removed 7 redundant places. [2023-11-19 07:42:14,892 INFO L231 Difference]: Finished difference. Result has 148 places, 605 transitions, 8886 flow [2023-11-19 07:42:14,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8886, PETRI_PLACES=148, PETRI_TRANSITIONS=605} [2023-11-19 07:42:14,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-11-19 07:42:14,894 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 605 transitions, 8886 flow [2023-11-19 07:42:14,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 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 07:42:14,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:42:14,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:14,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:15,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,095 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:42:15,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash 285467432, now seen corresponding path program 4 times [2023-11-19 07:42:15,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:15,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883843557] [2023-11-19 07:42:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:15,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883843557] [2023-11-19 07:42:15,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883843557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599801305] [2023-11-19 07:42:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:42:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:15,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:15,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e65e2f6-e944-40e4-bc5c-a0bfae832e4c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:42:15,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:42:15,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:15,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:42:15,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:15,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:42:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599801305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:15,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-11-19 07:42:15,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769887341] [2023-11-19 07:42:15,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:42:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:42:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:42:15,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-19 07:42:15,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 605 transitions, 8886 flow. Second operand has 9 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 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 07:42:15,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:42:15,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-19 07:42:15,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand