./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/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_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/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_ded7a316-deaf-4e18-b634-a1e5f32090c9/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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:53:50,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:53:50,879 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:53:50,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:53:50,896 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:53:50,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:53:50,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:53:50,939 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:53:50,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:53:50,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:53:50,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:53:50,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:53:50,947 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:53:50,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:53:50,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:53:50,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:53:50,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:53:50,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:53:50,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:53:50,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:53:50,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:53:50,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:53:50,954 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:53:50,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:53:50,955 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:53:50,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:53:50,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:53:50,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:53:50,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:50,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:53:50,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:53:50,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:53:50,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:53:50,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:53:50,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:53:50,961 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:53:50,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:53:50,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:53:50,962 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:53:50,962 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_ded7a316-deaf-4e18-b634-a1e5f32090c9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2023-11-19 07:53:51,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:53:51,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:53:51,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:53:51,310 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:53:51,311 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:53:51,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-19 07:53:54,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:53:54,769 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:53:54,770 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-19 07:53:54,780 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/data/d08755001/1067144892834df39a4152e5864dda3c/FLAG324a12fdd [2023-11-19 07:53:54,796 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/data/d08755001/1067144892834df39a4152e5864dda3c [2023-11-19 07:53:54,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:53:54,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:53:54,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:54,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:53:54,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:53:54,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:54" (1/1) ... [2023-11-19 07:53:54,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739896d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:54, skipping insertion in model container [2023-11-19 07:53:54,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:54" (1/1) ... [2023-11-19 07:53:54,847 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:53:55,040 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_ded7a316-deaf-4e18-b634-a1e5f32090c9/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-19 07:53:55,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:55,064 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:53:55,092 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_ded7a316-deaf-4e18-b634-a1e5f32090c9/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-19 07:53:55,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:55,106 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:53:55,107 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:53:55,115 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:53:55,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55 WrapperNode [2023-11-19 07:53:55,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:55,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:55,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:53:55,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:53:55,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,167 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 149 [2023-11-19 07:53:55,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:55,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:53:55,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:53:55,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:53:55,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,206 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:53:55,211 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:53:55,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:53:55,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:53:55,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (1/1) ... [2023-11-19 07:53:55,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:55,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:53:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:53:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:53:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:53:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:53:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:53:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:53:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:53:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:53:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:53:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:53:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:53:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:53:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:53:55,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:53:55,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:53:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:53:55,351 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 07:53:55,546 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:53:55,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:53:55,850 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:53:56,036 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:53:56,036 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:53:56,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:56 BoogieIcfgContainer [2023-11-19 07:53:56,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:53:56,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:53:56,052 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:53:56,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:53:56,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:53:54" (1/3) ... [2023-11-19 07:53:56,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ca60bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:56, skipping insertion in model container [2023-11-19 07:53:56,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:55" (2/3) ... [2023-11-19 07:53:56,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ca60bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:56, skipping insertion in model container [2023-11-19 07:53:56,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:56" (3/3) ... [2023-11-19 07:53:56,072 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-19 07:53:56,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:53:56,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:53:56,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:53:56,100 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:53:56,208 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:53:56,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 137 transitions, 288 flow [2023-11-19 07:53:56,343 INFO L124 PetriNetUnfolderBase]: 11/135 cut-off events. [2023-11-19 07:53:56,344 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:53:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 11/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-19 07:53:56,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 137 transitions, 288 flow [2023-11-19 07:53:56,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2023-11-19 07:53:56,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:53:56,371 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 126 transitions, 264 flow [2023-11-19 07:53:56,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 126 transitions, 264 flow [2023-11-19 07:53:56,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 126 transitions, 264 flow [2023-11-19 07:53:56,423 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-11-19 07:53:56,424 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:53:56,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-11-19 07:53:56,427 INFO L119 LiptonReduction]: Number of co-enabled transitions 916 [2023-11-19 07:54:01,671 INFO L134 LiptonReduction]: Checked pairs total: 996 [2023-11-19 07:54:01,671 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-11-19 07:54:01,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:01,697 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;@131dd343, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:01,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:54:01,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:01,705 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:54:01,706 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:01,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:01,707 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 07:54:01,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1614793718, now seen corresponding path program 1 times [2023-11-19 07:54:01,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520554551] [2023-11-19 07:54:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:02,179 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 07:54:02,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:02,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520554551] [2023-11-19 07:54:02,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520554551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:02,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:02,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875628837] [2023-11-19 07:54:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:02,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 269 [2023-11-19 07:54:02,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 07:54:02,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:02,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 269 [2023-11-19 07:54:02,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:02,311 INFO L124 PetriNetUnfolderBase]: 58/108 cut-off events. [2023-11-19 07:54:02,311 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:54:02,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 108 events. 58/108 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 271 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 161. Up to 61 conditions per place. [2023-11-19 07:54:02,315 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 21 selfloop transitions, 2 changer transitions 4/28 dead transitions. [2023-11-19 07:54:02,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2023-11-19 07:54:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-11-19 07:54:02,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451053283767037 [2023-11-19 07:54:02,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-11-19 07:54:02,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-11-19 07:54:02,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:02,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-11-19 07:54:02,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:02,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:54:02,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:54:02,367 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 391 transitions. [2023-11-19 07:54:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2023-11-19 07:54:02,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:54:02,373 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-19 07:54:02,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-19 07:54:02,384 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:54:02,384 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-19 07:54:02,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 07:54:02,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:02,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:02,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:02,386 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 07:54:02,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1443983427, now seen corresponding path program 1 times [2023-11-19 07:54:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:02,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999342007] [2023-11-19 07:54:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:02,585 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 07:54:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999342007] [2023-11-19 07:54:02,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999342007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:02,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:02,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88150991] [2023-11-19 07:54:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:02,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:02,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:02,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 269 [2023-11-19 07:54:02,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 07:54:02,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:02,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 269 [2023-11-19 07:54:02,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:02,661 INFO L124 PetriNetUnfolderBase]: 54/107 cut-off events. [2023-11-19 07:54:02,661 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-19 07:54:02,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 107 events. 54/107 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 275 event pairs, 21 based on Foata normal form. 8/96 useless extension candidates. Maximal degree in co-relation 146. Up to 66 conditions per place. [2023-11-19 07:54:02,663 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 17 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-11-19 07:54:02,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 114 flow [2023-11-19 07:54:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-11-19 07:54:02,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684014869888476 [2023-11-19 07:54:02,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-11-19 07:54:02,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-11-19 07:54:02,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:02,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-11-19 07:54:02,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 07:54:02,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:54:02,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:54:02,673 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 378 transitions. [2023-11-19 07:54:02,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 114 flow [2023-11-19 07:54:02,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:02,675 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-19 07:54:02,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-19 07:54:02,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-19 07:54:02,677 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-19 07:54:02,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 07:54:02,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:02,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:02,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:02,679 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 07:54:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash -579582265, now seen corresponding path program 1 times [2023-11-19 07:54:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485285550] [2023-11-19 07:54:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:02,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:02,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485285550] [2023-11-19 07:54:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485285550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:02,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:54:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304066835] [2023-11-19 07:54:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:02,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:02,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 269 [2023-11-19 07:54:02,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 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 07:54:02,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:02,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 269 [2023-11-19 07:54:02,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:03,030 INFO L124 PetriNetUnfolderBase]: 69/148 cut-off events. [2023-11-19 07:54:03,031 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-19 07:54:03,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 148 events. 69/148 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 483 event pairs, 52 based on Foata normal form. 6/152 useless extension candidates. Maximal degree in co-relation 248. Up to 107 conditions per place. [2023-11-19 07:54:03,033 INFO L140 encePairwiseOnDemand]: 265/269 looper letters, 17 selfloop transitions, 2 changer transitions 11/31 dead transitions. [2023-11-19 07:54:03,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 148 flow [2023-11-19 07:54:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2023-11-19 07:54:03,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507434944237918 [2023-11-19 07:54:03,036 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2023-11-19 07:54:03,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2023-11-19 07:54:03,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:03,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2023-11-19 07:54:03,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 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 07:54:03,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 07:54:03,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 07:54:03,044 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 485 transitions. [2023-11-19 07:54:03,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 148 flow [2023-11-19 07:54:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:03,046 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-19 07:54:03,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-19 07:54:03,047 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-19 07:54:03,048 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-19 07:54:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 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 07:54:03,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:03,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:03,049 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 07:54:03,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2053605498, now seen corresponding path program 1 times [2023-11-19 07:54:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:03,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535964021] [2023-11-19 07:54:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:03,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:04,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535964021] [2023-11-19 07:54:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535964021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:04,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746980922] [2023-11-19 07:54:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:04,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:04,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:04,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:04,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:54:04,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:04,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 07:54:04,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:54:04,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:54:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:05,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:05,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:05,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-11-19 07:54:06,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:06,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 300 [2023-11-19 07:54:06,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:06,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-11-19 07:54:06,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:06,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-11-19 07:54:06,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:06,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-19 07:54:06,402 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:54:06,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 136 [2023-11-19 07:54:06,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:54:06,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2023-11-19 07:54:06,483 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:54:06,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-11-19 07:54:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746980922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:06,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:06,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-19 07:54:06,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734366805] [2023-11-19 07:54:06,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:54:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:54:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=362, Unknown=1, NotChecked=0, Total=462 [2023-11-19 07:54:08,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 269 [2023-11-19 07:54:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 22 states, 22 states have (on average 78.95454545454545) internal successors, (1737), 22 states have internal predecessors, (1737), 0 states have call successors, (0), 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 07:54:08,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:08,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 269 [2023-11-19 07:54:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:09,866 INFO L124 PetriNetUnfolderBase]: 183/380 cut-off events. [2023-11-19 07:54:09,867 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-19 07:54:09,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 380 events. 183/380 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1815 event pairs, 18 based on Foata normal form. 17/393 useless extension candidates. Maximal degree in co-relation 889. Up to 107 conditions per place. [2023-11-19 07:54:09,875 INFO L140 encePairwiseOnDemand]: 261/269 looper letters, 29 selfloop transitions, 17 changer transitions 63/110 dead transitions. [2023-11-19 07:54:09,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 537 flow [2023-11-19 07:54:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:54:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:54:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1576 transitions. [2023-11-19 07:54:09,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3083545294462923 [2023-11-19 07:54:09,887 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1576 transitions. [2023-11-19 07:54:09,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1576 transitions. [2023-11-19 07:54:09,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:09,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1576 transitions. [2023-11-19 07:54:09,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 82.94736842105263) internal successors, (1576), 19 states have internal predecessors, (1576), 0 states have call successors, (0), 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 07:54:09,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 269.0) internal successors, (5380), 20 states have internal predecessors, (5380), 0 states have call successors, (0), 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 07:54:09,919 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 269.0) internal successors, (5380), 20 states have internal predecessors, (5380), 0 states have call successors, (0), 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 07:54:09,919 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 19 states and 1576 transitions. [2023-11-19 07:54:09,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 537 flow [2023-11-19 07:54:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 110 transitions, 525 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:09,927 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 187 flow [2023-11-19 07:54:09,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=187, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-11-19 07:54:09,929 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-19 07:54:09,930 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 187 flow [2023-11-19 07:54:09,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 78.95454545454545) internal successors, (1737), 22 states have internal predecessors, (1737), 0 states have call successors, (0), 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 07:54:09,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:09,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:09,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:10,156 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 07:54:10,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash 120495524, now seen corresponding path program 2 times [2023-11-19 07:54:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:10,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329337731] [2023-11-19 07:54:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329337731] [2023-11-19 07:54:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329337731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346055617] [2023-11-19 07:54:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:10,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:10,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:10,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:10,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:10,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:10,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:54:10,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:10,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2023-11-19 07:54:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:10,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:10,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 52 [2023-11-19 07:54:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:54:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346055617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:10,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-19 07:54:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795216502] [2023-11-19 07:54:10,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:10,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:54:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:54:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:54:10,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 269 [2023-11-19 07:54:10,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 187 flow. Second operand has 8 states, 8 states have (on average 122.75) internal successors, (982), 8 states have internal predecessors, (982), 0 states have call successors, (0), 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 07:54:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 269 [2023-11-19 07:54:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:10,806 INFO L124 PetriNetUnfolderBase]: 200/400 cut-off events. [2023-11-19 07:54:10,806 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-11-19 07:54:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 400 events. 200/400 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1792 event pairs, 67 based on Foata normal form. 8/406 useless extension candidates. Maximal degree in co-relation 1145. Up to 178 conditions per place. [2023-11-19 07:54:10,810 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 41 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2023-11-19 07:54:10,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 385 flow [2023-11-19 07:54:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-11-19 07:54:10,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47026022304832715 [2023-11-19 07:54:10,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-11-19 07:54:10,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-11-19 07:54:10,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:10,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-11-19 07:54:10,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 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 07:54:10,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 07:54:10,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 07:54:10,820 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 187 flow. Second operand 4 states and 506 transitions. [2023-11-19 07:54:10,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 385 flow [2023-11-19 07:54:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 330 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:10,829 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 239 flow [2023-11-19 07:54:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-19 07:54:10,832 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-19 07:54:10,833 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 239 flow [2023-11-19 07:54:10,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 122.75) internal successors, (982), 8 states have internal predecessors, (982), 0 states have call successors, (0), 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 07:54:10,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:10,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:10,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:11,047 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 07:54:11,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1446695603, now seen corresponding path program 3 times [2023-11-19 07:54:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:11,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568284236] [2023-11-19 07:54:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568284236] [2023-11-19 07:54:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568284236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202857459] [2023-11-19 07:54:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:11,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:11,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:11,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:12,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:54:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:12,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:54:12,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:12,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:12,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:12,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2023-11-19 07:54:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202857459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:13,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:13,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-11-19 07:54:13,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747819452] [2023-11-19 07:54:13,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:13,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:54:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:54:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:54:13,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-11-19 07:54:13,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 239 flow. Second operand has 26 states, 26 states have (on average 98.84615384615384) internal successors, (2570), 26 states have internal predecessors, (2570), 0 states have call successors, (0), 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 07:54:13,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:13,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-11-19 07:54:13,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:15,358 INFO L124 PetriNetUnfolderBase]: 496/948 cut-off events. [2023-11-19 07:54:15,358 INFO L125 PetriNetUnfolderBase]: For 1549/1549 co-relation queries the response was YES. [2023-11-19 07:54:15,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3210 conditions, 948 events. 496/948 cut-off events. For 1549/1549 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5070 event pairs, 37 based on Foata normal form. 8/955 useless extension candidates. Maximal degree in co-relation 986. Up to 213 conditions per place. [2023-11-19 07:54:15,365 INFO L140 encePairwiseOnDemand]: 262/269 looper letters, 77 selfloop transitions, 44 changer transitions 56/178 dead transitions. [2023-11-19 07:54:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 178 transitions, 1237 flow [2023-11-19 07:54:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:54:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:54:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2296 transitions. [2023-11-19 07:54:15,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879689084150051 [2023-11-19 07:54:15,376 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2296 transitions. [2023-11-19 07:54:15,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2296 transitions. [2023-11-19 07:54:15,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:15,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2296 transitions. [2023-11-19 07:54:15,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.36363636363636) internal successors, (2296), 22 states have internal predecessors, (2296), 0 states have call successors, (0), 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 07:54:15,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 269.0) internal successors, (6187), 23 states have internal predecessors, (6187), 0 states have call successors, (0), 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 07:54:15,399 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 269.0) internal successors, (6187), 23 states have internal predecessors, (6187), 0 states have call successors, (0), 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 07:54:15,399 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 239 flow. Second operand 22 states and 2296 transitions. [2023-11-19 07:54:15,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 178 transitions, 1237 flow [2023-11-19 07:54:15,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 178 transitions, 1175 flow, removed 31 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:15,408 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 711 flow [2023-11-19 07:54:15,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=711, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-19 07:54:15,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-11-19 07:54:15,410 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 711 flow [2023-11-19 07:54:15,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.84615384615384) internal successors, (2570), 26 states have internal predecessors, (2570), 0 states have call successors, (0), 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 07:54:15,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:15,412 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:15,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:15,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:54:15,623 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 07:54:15,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1663256887, now seen corresponding path program 4 times [2023-11-19 07:54:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89378612] [2023-11-19 07:54:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:15,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:17,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89378612] [2023-11-19 07:54:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89378612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:17,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100184918] [2023-11-19 07:54:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:17,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:17,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:17,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:17,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:54:17,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:54:17,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:17,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:17,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2023-11-19 07:54:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:54:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100184918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:17,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:17,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-11-19 07:54:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122681864] [2023-11-19 07:54:17,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:54:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:54:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:54:18,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 269 [2023-11-19 07:54:18,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 711 flow. Second operand has 22 states, 22 states have (on average 101.22727272727273) internal successors, (2227), 22 states have internal predecessors, (2227), 0 states have call successors, (0), 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 07:54:18,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:18,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 269 [2023-11-19 07:54:18,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:19,220 INFO L124 PetriNetUnfolderBase]: 609/1165 cut-off events. [2023-11-19 07:54:19,220 INFO L125 PetriNetUnfolderBase]: For 5625/5625 co-relation queries the response was YES. [2023-11-19 07:54:19,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4749 conditions, 1165 events. 609/1165 cut-off events. For 5625/5625 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6619 event pairs, 130 based on Foata normal form. 3/1166 useless extension candidates. Maximal degree in co-relation 4315. Up to 393 conditions per place. [2023-11-19 07:54:19,232 INFO L140 encePairwiseOnDemand]: 262/269 looper letters, 59 selfloop transitions, 37 changer transitions 28/125 dead transitions. [2023-11-19 07:54:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1250 flow [2023-11-19 07:54:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:54:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:54:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1461 transitions. [2023-11-19 07:54:19,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38794476898566116 [2023-11-19 07:54:19,240 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1461 transitions. [2023-11-19 07:54:19,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1461 transitions. [2023-11-19 07:54:19,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:19,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1461 transitions. [2023-11-19 07:54:19,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.35714285714286) internal successors, (1461), 14 states have internal predecessors, (1461), 0 states have call successors, (0), 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 07:54:19,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 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 07:54:19,256 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 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 07:54:19,256 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 711 flow. Second operand 14 states and 1461 transitions. [2023-11-19 07:54:19,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1250 flow [2023-11-19 07:54:19,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 1115 flow, removed 62 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:19,318 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 781 flow [2023-11-19 07:54:19,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=781, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-11-19 07:54:19,320 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-11-19 07:54:19,320 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 781 flow [2023-11-19 07:54:19,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.22727272727273) internal successors, (2227), 22 states have internal predecessors, (2227), 0 states have call successors, (0), 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 07:54:19,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:19,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:19,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:19,552 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 07:54:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1741418994, now seen corresponding path program 5 times [2023-11-19 07:54:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053601474] [2023-11-19 07:54:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:20,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053601474] [2023-11-19 07:54:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053601474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:20,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608288475] [2023-11-19 07:54:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:54:20,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:20,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:54:20,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:20,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:54:20,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:21,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:21,710 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-19 07:54:21,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 126 [2023-11-19 07:54:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:22,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608288475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:22,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:22,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-11-19 07:54:22,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301120268] [2023-11-19 07:54:22,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:22,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:54:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:54:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:54:23,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-11-19 07:54:23,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 781 flow. Second operand has 27 states, 27 states have (on average 98.88888888888889) internal successors, (2670), 27 states have internal predecessors, (2670), 0 states have call successors, (0), 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 07:54:23,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:23,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-11-19 07:54:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:25,307 INFO L124 PetriNetUnfolderBase]: 1001/1885 cut-off events. [2023-11-19 07:54:25,307 INFO L125 PetriNetUnfolderBase]: For 10120/10120 co-relation queries the response was YES. [2023-11-19 07:54:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7680 conditions, 1885 events. 1001/1885 cut-off events. For 10120/10120 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11435 event pairs, 122 based on Foata normal form. 12/1896 useless extension candidates. Maximal degree in co-relation 7208. Up to 402 conditions per place. [2023-11-19 07:54:25,325 INFO L140 encePairwiseOnDemand]: 262/269 looper letters, 113 selfloop transitions, 69 changer transitions 77/260 dead transitions. [2023-11-19 07:54:25,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 260 transitions, 2312 flow [2023-11-19 07:54:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:54:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:54:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2820 transitions. [2023-11-19 07:54:25,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882693102023957 [2023-11-19 07:54:25,338 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2820 transitions. [2023-11-19 07:54:25,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2820 transitions. [2023-11-19 07:54:25,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:25,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2820 transitions. [2023-11-19 07:54:25,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.44444444444444) internal successors, (2820), 27 states have internal predecessors, (2820), 0 states have call successors, (0), 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 07:54:25,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 269.0) internal successors, (7532), 28 states have internal predecessors, (7532), 0 states have call successors, (0), 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 07:54:25,366 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 269.0) internal successors, (7532), 28 states have internal predecessors, (7532), 0 states have call successors, (0), 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 07:54:25,366 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 781 flow. Second operand 27 states and 2820 transitions. [2023-11-19 07:54:25,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 260 transitions, 2312 flow [2023-11-19 07:54:25,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 260 transitions, 2235 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-19 07:54:25,407 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 1301 flow [2023-11-19 07:54:25,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1301, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2023-11-19 07:54:25,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-11-19 07:54:25,408 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 1301 flow [2023-11-19 07:54:25,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.88888888888889) internal successors, (2670), 27 states have internal predecessors, (2670), 0 states have call successors, (0), 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 07:54:25,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:25,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:25,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:25,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:25,612 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 07:54:25,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 178988514, now seen corresponding path program 6 times [2023-11-19 07:54:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:25,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655723657] [2023-11-19 07:54:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:26,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655723657] [2023-11-19 07:54:26,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655723657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:26,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227517830] [2023-11-19 07:54:26,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:54:26,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:26,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:26,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:26,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:54:26,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:54:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:26,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-19 07:54:26,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:27,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:27,780 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-19 07:54:27,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 130 [2023-11-19 07:54:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:28,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227517830] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:28,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:28,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-11-19 07:54:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723542599] [2023-11-19 07:54:28,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:54:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:54:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:54:29,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-11-19 07:54:29,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 1301 flow. Second operand has 27 states, 27 states have (on average 98.88888888888889) internal successors, (2670), 27 states have internal predecessors, (2670), 0 states have call successors, (0), 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 07:54:29,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:29,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-11-19 07:54:29,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:33,680 INFO L124 PetriNetUnfolderBase]: 1751/3268 cut-off events. [2023-11-19 07:54:33,680 INFO L125 PetriNetUnfolderBase]: For 29706/29706 co-relation queries the response was YES. [2023-11-19 07:54:33,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 3268 events. 1751/3268 cut-off events. For 29706/29706 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21913 event pairs, 268 based on Foata normal form. 31/3299 useless extension candidates. Maximal degree in co-relation 14444. Up to 953 conditions per place. [2023-11-19 07:54:33,718 INFO L140 encePairwiseOnDemand]: 262/269 looper letters, 143 selfloop transitions, 129 changer transitions 114/387 dead transitions. [2023-11-19 07:54:33,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 387 transitions, 4130 flow [2023-11-19 07:54:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-19 07:54:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-19 07:54:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3974 transitions. [2023-11-19 07:54:33,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38876932107219725 [2023-11-19 07:54:33,735 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3974 transitions. [2023-11-19 07:54:33,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3974 transitions. [2023-11-19 07:54:33,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:33,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3974 transitions. [2023-11-19 07:54:33,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 104.57894736842105) internal successors, (3974), 38 states have internal predecessors, (3974), 0 states have call successors, (0), 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 07:54:33,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 269.0) internal successors, (10491), 39 states have internal predecessors, (10491), 0 states have call successors, (0), 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 07:54:33,796 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 269.0) internal successors, (10491), 39 states have internal predecessors, (10491), 0 states have call successors, (0), 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 07:54:33,796 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 1301 flow. Second operand 38 states and 3974 transitions. [2023-11-19 07:54:33,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 387 transitions, 4130 flow [2023-11-19 07:54:33,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 387 transitions, 3824 flow, removed 137 selfloop flow, removed 11 redundant places. [2023-11-19 07:54:33,877 INFO L231 Difference]: Finished difference. Result has 142 places, 187 transitions, 2867 flow [2023-11-19 07:54:33,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2867, PETRI_PLACES=142, PETRI_TRANSITIONS=187} [2023-11-19 07:54:33,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-11-19 07:54:33,880 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 187 transitions, 2867 flow [2023-11-19 07:54:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.88888888888889) internal successors, (2670), 27 states have internal predecessors, (2670), 0 states have call successors, (0), 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 07:54:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:33,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:33,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:34,098 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 07:54:34,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 175283785, now seen corresponding path program 7 times [2023-11-19 07:54:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667779174] [2023-11-19 07:54:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:34,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:34,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667779174] [2023-11-19 07:54:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667779174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:34,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001142841] [2023-11-19 07:54:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:54:34,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:34,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:34,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:34,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:54:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:34,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:54:34,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:34,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001142841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:34,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:54:34,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993927407] [2023-11-19 07:54:34,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:54:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:54:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:54:34,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 269 [2023-11-19 07:54:34,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 187 transitions, 2867 flow. Second operand has 18 states, 18 states have (on average 109.88888888888889) internal successors, (1978), 18 states have internal predecessors, (1978), 0 states have call successors, (0), 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 07:54:34,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:34,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 269 [2023-11-19 07:54:34,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:35,485 INFO L124 PetriNetUnfolderBase]: 657/1327 cut-off events. [2023-11-19 07:54:35,485 INFO L125 PetriNetUnfolderBase]: For 12909/12909 co-relation queries the response was YES. [2023-11-19 07:54:35,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5624 conditions, 1327 events. 657/1327 cut-off events. For 12909/12909 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8081 event pairs, 182 based on Foata normal form. 78/1405 useless extension candidates. Maximal degree in co-relation 5584. Up to 586 conditions per place. [2023-11-19 07:54:35,499 INFO L140 encePairwiseOnDemand]: 264/269 looper letters, 76 selfloop transitions, 17 changer transitions 24/118 dead transitions. [2023-11-19 07:54:35,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 118 transitions, 1520 flow [2023-11-19 07:54:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:54:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:54:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1143 transitions. [2023-11-19 07:54:35,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42490706319702604 [2023-11-19 07:54:35,505 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1143 transitions. [2023-11-19 07:54:35,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1143 transitions. [2023-11-19 07:54:35,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:35,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1143 transitions. [2023-11-19 07:54:35,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 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 07:54:35,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 07:54:35,513 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 07:54:35,514 INFO L175 Difference]: Start difference. First operand has 142 places, 187 transitions, 2867 flow. Second operand 10 states and 1143 transitions. [2023-11-19 07:54:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 118 transitions, 1520 flow [2023-11-19 07:54:35,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 1116 flow, removed 132 selfloop flow, removed 31 redundant places. [2023-11-19 07:54:35,558 INFO L231 Difference]: Finished difference. Result has 105 places, 75 transitions, 707 flow [2023-11-19 07:54:35,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=707, PETRI_PLACES=105, PETRI_TRANSITIONS=75} [2023-11-19 07:54:35,559 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-11-19 07:54:35,559 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 75 transitions, 707 flow [2023-11-19 07:54:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.88888888888889) internal successors, (1978), 18 states have internal predecessors, (1978), 0 states have call successors, (0), 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 07:54:35,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:35,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:35,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:54:35,776 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 07:54:35,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 725336246, now seen corresponding path program 8 times [2023-11-19 07:54:35,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:35,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364364164] [2023-11-19 07:54:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:54:35,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:35,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364364164] [2023-11-19 07:54:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364364164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:35,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999393321] [2023-11-19 07:54:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:35,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:35,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:35,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:54:36,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:36,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:36,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:36,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:54:36,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2023-11-19 07:54:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:54:36,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:36,331 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:54:36,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 82 [2023-11-19 07:54:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:54:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999393321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:36,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 11 [2023-11-19 07:54:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404496539] [2023-11-19 07:54:36,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:54:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:54:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:54:36,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 269 [2023-11-19 07:54:36,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 75 transitions, 707 flow. Second operand has 12 states, 12 states have (on average 116.58333333333333) internal successors, (1399), 12 states have internal predecessors, (1399), 0 states have call successors, (0), 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 07:54:36,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:36,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 269 [2023-11-19 07:54:36,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:36,903 INFO L124 PetriNetUnfolderBase]: 839/1644 cut-off events. [2023-11-19 07:54:36,903 INFO L125 PetriNetUnfolderBase]: For 7457/7457 co-relation queries the response was YES. [2023-11-19 07:54:36,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6213 conditions, 1644 events. 839/1644 cut-off events. For 7457/7457 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10081 event pairs, 198 based on Foata normal form. 12/1656 useless extension candidates. Maximal degree in co-relation 6184. Up to 696 conditions per place. [2023-11-19 07:54:36,916 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 90 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2023-11-19 07:54:36,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 1501 flow [2023-11-19 07:54:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:54:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:54:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 852 transitions. [2023-11-19 07:54:36,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45246946362187995 [2023-11-19 07:54:36,920 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 852 transitions. [2023-11-19 07:54:36,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 852 transitions. [2023-11-19 07:54:36,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:36,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 852 transitions. [2023-11-19 07:54:36,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 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 07:54:36,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 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 07:54:36,925 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 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 07:54:36,925 INFO L175 Difference]: Start difference. First operand has 105 places, 75 transitions, 707 flow. Second operand 7 states and 852 transitions. [2023-11-19 07:54:36,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 1501 flow [2023-11-19 07:54:36,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 133 transitions, 1400 flow, removed 36 selfloop flow, removed 11 redundant places. [2023-11-19 07:54:36,957 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 1109 flow [2023-11-19 07:54:36,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1109, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2023-11-19 07:54:36,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2023-11-19 07:54:36,959 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 1109 flow [2023-11-19 07:54:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.58333333333333) internal successors, (1399), 12 states have internal predecessors, (1399), 0 states have call successors, (0), 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 07:54:36,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:36,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:36,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:37,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ded7a316-deaf-4e18-b634-a1e5f32090c9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:54:37,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:54:37,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash 633622068, now seen corresponding path program 9 times [2023-11-19 07:54:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:37,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975369052] [2023-11-19 07:54:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat