./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU --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 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:08,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:08,854 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:14:08,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:08,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:08,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:08,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:08,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:08,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:08,919 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:08,922 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:08,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:08,923 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:08,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:08,927 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:08,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:08,928 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:14:08,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:08,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:08,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:08,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:08,934 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:14:08,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:08,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:14:08,935 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:08,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:08,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:14:08,937 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:08,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:08,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:08,941 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:08,941 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:08,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:08,942 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:08,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:08,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:14:08,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:08,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:08,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:08,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:08,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:08,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:08,957 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_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2024-10-31 22:14:09,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:09,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:09,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:09,331 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:09,332 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:09,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c Unable to find full path for "g++" [2024-10-31 22:14:11,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:11,670 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:11,671 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2024-10-31 22:14:11,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/data/a134c590c/59c0f02bedf64c70b912cd2f77f83cae/FLAG73089bef5 [2024-10-31 22:14:11,704 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/data/a134c590c/59c0f02bedf64c70b912cd2f77f83cae [2024-10-31 22:14:11,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:11,709 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:11,711 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:11,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:11,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:11,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:11" (1/1) ... [2024-10-31 22:14:11,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f95bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:11, skipping insertion in model container [2024-10-31 22:14:11,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:11" (1/1) ... [2024-10-31 22:14:11,754 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:12,073 WARN L251 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_deadee8f-ed9b-44ed-ad38-71ce80680369/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2024-10-31 22:14:12,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:12,091 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:12,118 WARN L251 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_deadee8f-ed9b-44ed-ad38-71ce80680369/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c[3066,3079] [2024-10-31 22:14:12,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:12,138 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:12,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12 WrapperNode [2024-10-31 22:14:12,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:12,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:12,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:12,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:12,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,156 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,185 INFO L138 Inliner]: procedures = 21, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2024-10-31 22:14:12,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:12,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:12,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:12,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:12,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,228 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:14:12,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,248 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:12,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:12,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:12,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:12,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (1/1) ... [2024-10-31 22:14:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:12,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:14:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:14:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:14:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:14:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:14:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:14:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:14:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:14:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:12,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:12,332 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:14:12,483 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:12,485 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:12,823 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:14:12,823 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:13,059 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:13,059 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:14:13,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:13 BoogieIcfgContainer [2024-10-31 22:14:13,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:13,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:13,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:13,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:13,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:11" (1/3) ... [2024-10-31 22:14:13,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1033b065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:13, skipping insertion in model container [2024-10-31 22:14:13,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:12" (2/3) ... [2024-10-31 22:14:13,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1033b065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:13, skipping insertion in model container [2024-10-31 22:14:13,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:13" (3/3) ... [2024-10-31 22:14:13,071 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2024-10-31 22:14:13,092 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:13,093 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:14:13,093 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:14:13,179 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:14:13,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2024-10-31 22:14:13,263 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-10-31 22:14:13,263 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:14:13,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 70 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-10-31 22:14:13,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2024-10-31 22:14:13,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2024-10-31 22:14:13,287 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:13,294 INFO L333 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, 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;@4f675efb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:13,294 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-31 22:14:13,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:14:13,312 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-10-31 22:14:13,312 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:14:13,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:13,317 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:13,317 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:13,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1869697828, now seen corresponding path program 1 times [2024-10-31 22:14:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:13,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076910079] [2024-10-31 22:14:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:14,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076910079] [2024-10-31 22:14:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076910079] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:14,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581873934] [2024-10-31 22:14:14,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:14,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:14,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:14,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:14,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:14,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:14,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:14,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:15,020 INFO L124 PetriNetUnfolderBase]: 1930/2760 cut-off events. [2024-10-31 22:14:15,021 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-10-31 22:14:15,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 2760 events. 1930/2760 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13547 event pairs, 66 based on Foata normal form. 0/2246 useless extension candidates. Maximal degree in co-relation 5542. Up to 970 conditions per place. [2024-10-31 22:14:15,071 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 71 selfloop transitions, 8 changer transitions 6/91 dead transitions. [2024-10-31 22:14:15,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 91 transitions, 385 flow [2024-10-31 22:14:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:14:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:14:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-10-31 22:14:15,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-10-31 22:14:15,103 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 6 states and 141 transitions. [2024-10-31 22:14:15,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 91 transitions, 385 flow [2024-10-31 22:14:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 91 transitions, 363 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:14:15,146 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 120 flow [2024-10-31 22:14:15,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-10-31 22:14:15,159 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-10-31 22:14:15,159 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 120 flow [2024-10-31 22:14:15,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:15,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:15,160 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:15,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:15,160 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:15,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 973632830, now seen corresponding path program 1 times [2024-10-31 22:14:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087110239] [2024-10-31 22:14:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087110239] [2024-10-31 22:14:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087110239] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:15,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328218635] [2024-10-31 22:14:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:15,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:15,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 22:14:15,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:15,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:15,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 22:14:15,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:15,582 INFO L124 PetriNetUnfolderBase]: 1274/1985 cut-off events. [2024-10-31 22:14:15,583 INFO L125 PetriNetUnfolderBase]: For 484/518 co-relation queries the response was YES. [2024-10-31 22:14:15,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 1985 events. 1274/1985 cut-off events. For 484/518 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9821 event pairs, 424 based on Foata normal form. 86/1666 useless extension candidates. Maximal degree in co-relation 3922. Up to 1047 conditions per place. [2024-10-31 22:14:15,597 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-31 22:14:15,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 59 transitions, 273 flow [2024-10-31 22:14:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-10-31 22:14:15,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-10-31 22:14:15,600 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 120 flow. Second operand 3 states and 80 transitions. [2024-10-31 22:14:15,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 59 transitions, 273 flow [2024-10-31 22:14:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 273 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:14:15,603 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 134 flow [2024-10-31 22:14:15,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-10-31 22:14:15,604 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-10-31 22:14:15,604 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 134 flow [2024-10-31 22:14:15,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:15,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:15,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:15,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:15,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:15,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1520712930, now seen corresponding path program 1 times [2024-10-31 22:14:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297775545] [2024-10-31 22:14:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:15,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:15,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297775545] [2024-10-31 22:14:15,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297775545] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:15,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:15,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:15,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915855845] [2024-10-31 22:14:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:15,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:15,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 22:14:15,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:15,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:15,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 22:14:15,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:16,071 INFO L124 PetriNetUnfolderBase]: 1715/2705 cut-off events. [2024-10-31 22:14:16,072 INFO L125 PetriNetUnfolderBase]: For 968/1026 co-relation queries the response was YES. [2024-10-31 22:14:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6284 conditions, 2705 events. 1715/2705 cut-off events. For 968/1026 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14216 event pairs, 587 based on Foata normal form. 114/2305 useless extension candidates. Maximal degree in co-relation 5840. Up to 1613 conditions per place. [2024-10-31 22:14:16,092 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 44 selfloop transitions, 2 changer transitions 1/59 dead transitions. [2024-10-31 22:14:16,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 291 flow [2024-10-31 22:14:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-10-31 22:14:16,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-10-31 22:14:16,097 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 134 flow. Second operand 3 states and 78 transitions. [2024-10-31 22:14:16,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 291 flow [2024-10-31 22:14:16,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:16,102 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 148 flow [2024-10-31 22:14:16,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-10-31 22:14:16,106 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2024-10-31 22:14:16,106 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 148 flow [2024-10-31 22:14:16,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:16,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:16,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:16,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:16,107 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:16,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1930732514, now seen corresponding path program 1 times [2024-10-31 22:14:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:16,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897153145] [2024-10-31 22:14:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:16,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897153145] [2024-10-31 22:14:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897153145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:16,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:16,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394513775] [2024-10-31 22:14:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:16,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:16,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:16,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:16,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:16,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:16,734 INFO L124 PetriNetUnfolderBase]: 2217/3273 cut-off events. [2024-10-31 22:14:16,734 INFO L125 PetriNetUnfolderBase]: For 1592/1636 co-relation queries the response was YES. [2024-10-31 22:14:16,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8230 conditions, 3273 events. 2217/3273 cut-off events. For 1592/1636 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14718 event pairs, 156 based on Foata normal form. 44/2841 useless extension candidates. Maximal degree in co-relation 7532. Up to 1635 conditions per place. [2024-10-31 22:14:16,760 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 53 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-10-31 22:14:16,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 353 flow [2024-10-31 22:14:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-31 22:14:16,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2024-10-31 22:14:16,762 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 148 flow. Second operand 4 states and 85 transitions. [2024-10-31 22:14:16,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 353 flow [2024-10-31 22:14:16,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:16,768 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 173 flow [2024-10-31 22:14:16,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-10-31 22:14:16,769 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-10-31 22:14:16,769 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 173 flow [2024-10-31 22:14:16,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:16,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:16,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:16,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:14:16,770 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:16,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1261304906, now seen corresponding path program 2 times [2024-10-31 22:14:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979903433] [2024-10-31 22:14:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:16,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979903433] [2024-10-31 22:14:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979903433] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72641318] [2024-10-31 22:14:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:16,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:16,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:16,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:17,082 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:17,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:17,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:14:17,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:17,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72641318] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:17,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:17,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2024-10-31 22:14:17,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95709376] [2024-10-31 22:14:17,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:17,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:14:17,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:14:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:14:17,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:17,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 173 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:17,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:17,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:17,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:18,177 INFO L124 PetriNetUnfolderBase]: 2936/4328 cut-off events. [2024-10-31 22:14:18,178 INFO L125 PetriNetUnfolderBase]: For 2399/2456 co-relation queries the response was YES. [2024-10-31 22:14:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11073 conditions, 4328 events. 2936/4328 cut-off events. For 2399/2456 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21948 event pairs, 111 based on Foata normal form. 165/3964 useless extension candidates. Maximal degree in co-relation 10560. Up to 2614 conditions per place. [2024-10-31 22:14:18,209 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 70 selfloop transitions, 9 changer transitions 1/87 dead transitions. [2024-10-31 22:14:18,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 477 flow [2024-10-31 22:14:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:14:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:14:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-10-31 22:14:18,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-10-31 22:14:18,211 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 173 flow. Second operand 6 states and 125 transitions. [2024-10-31 22:14:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 477 flow [2024-10-31 22:14:18,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:18,218 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 210 flow [2024-10-31 22:14:18,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-10-31 22:14:18,220 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-10-31 22:14:18,220 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 210 flow [2024-10-31 22:14:18,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:18,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:18,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:18,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:18,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:18,422 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:18,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1094006826, now seen corresponding path program 3 times [2024-10-31 22:14:18,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:18,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599291148] [2024-10-31 22:14:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:18,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:18,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599291148] [2024-10-31 22:14:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599291148] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086813036] [2024-10-31 22:14:18,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:18,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:18,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:18,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:18,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:18,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:18,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:19,581 INFO L124 PetriNetUnfolderBase]: 4229/6275 cut-off events. [2024-10-31 22:14:19,582 INFO L125 PetriNetUnfolderBase]: For 5699/5827 co-relation queries the response was YES. [2024-10-31 22:14:19,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16873 conditions, 6275 events. 4229/6275 cut-off events. For 5699/5827 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32919 event pairs, 848 based on Foata normal form. 250/5719 useless extension candidates. Maximal degree in co-relation 13488. Up to 2457 conditions per place. [2024-10-31 22:14:19,640 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 69 selfloop transitions, 6 changer transitions 2/86 dead transitions. [2024-10-31 22:14:19,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 518 flow [2024-10-31 22:14:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-10-31 22:14:19,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-10-31 22:14:19,643 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 210 flow. Second operand 5 states and 109 transitions. [2024-10-31 22:14:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 518 flow [2024-10-31 22:14:19,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 492 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:19,658 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 204 flow [2024-10-31 22:14:19,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-31 22:14:19,659 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-10-31 22:14:19,659 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 204 flow [2024-10-31 22:14:19,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:19,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:19,661 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:19,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:14:19,662 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:19,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -287348584, now seen corresponding path program 4 times [2024-10-31 22:14:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132570582] [2024-10-31 22:14:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132570582] [2024-10-31 22:14:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132570582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252848394] [2024-10-31 22:14:20,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:14:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:20,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:20,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:20,206 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:14:20,207 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:20,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:14:20,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:20,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:20,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252848394] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:20,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:20,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 14 [2024-10-31 22:14:20,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498944968] [2024-10-31 22:14:20,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:20,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:14:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:14:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:14:20,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:20,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 204 flow. Second operand has 15 states, 15 states have (on average 11.866666666666667) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:20,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:20,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:20,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:23,099 INFO L124 PetriNetUnfolderBase]: 9235/14017 cut-off events. [2024-10-31 22:14:23,100 INFO L125 PetriNetUnfolderBase]: For 15229/15344 co-relation queries the response was YES. [2024-10-31 22:14:23,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37905 conditions, 14017 events. 9235/14017 cut-off events. For 15229/15344 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 85273 event pairs, 1191 based on Foata normal form. 429/12749 useless extension candidates. Maximal degree in co-relation 33095. Up to 3700 conditions per place. [2024-10-31 22:14:23,197 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 155 selfloop transitions, 35 changer transitions 27/225 dead transitions. [2024-10-31 22:14:23,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 225 transitions, 1308 flow [2024-10-31 22:14:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:14:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-31 22:14:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 329 transitions. [2024-10-31 22:14:23,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6092592592592593 [2024-10-31 22:14:23,200 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 204 flow. Second operand 15 states and 329 transitions. [2024-10-31 22:14:23,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 225 transitions, 1308 flow [2024-10-31 22:14:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 225 transitions, 1291 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:14:23,221 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 546 flow [2024-10-31 22:14:23,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=546, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-10-31 22:14:23,222 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2024-10-31 22:14:23,222 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 546 flow [2024-10-31 22:14:23,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.866666666666667) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:23,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:23,223 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:23,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:23,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:23,427 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:23,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 900343102, now seen corresponding path program 5 times [2024-10-31 22:14:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584619537] [2024-10-31 22:14:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:23,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:23,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584619537] [2024-10-31 22:14:23,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584619537] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539230098] [2024-10-31 22:14:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:14:23,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:23,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:23,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:23,706 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-31 22:14:23,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:23,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:14:23,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:23,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:23,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539230098] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:23,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:23,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2024-10-31 22:14:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034605069] [2024-10-31 22:14:23,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:23,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:23,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 22:14:23,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 22:14:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:25,788 INFO L124 PetriNetUnfolderBase]: 7392/11805 cut-off events. [2024-10-31 22:14:25,788 INFO L125 PetriNetUnfolderBase]: For 23853/24311 co-relation queries the response was YES. [2024-10-31 22:14:25,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36540 conditions, 11805 events. 7392/11805 cut-off events. For 23853/24311 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 74484 event pairs, 3683 based on Foata normal form. 466/10684 useless extension candidates. Maximal degree in co-relation 34510. Up to 4310 conditions per place. [2024-10-31 22:14:25,937 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 108 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-10-31 22:14:25,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 143 transitions, 1257 flow [2024-10-31 22:14:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-31 22:14:25,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2024-10-31 22:14:25,940 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 546 flow. Second operand 4 states and 113 transitions. [2024-10-31 22:14:25,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 143 transitions, 1257 flow [2024-10-31 22:14:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 1051 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-10-31 22:14:26,086 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 589 flow [2024-10-31 22:14:26,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=589, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-10-31 22:14:26,087 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-10-31 22:14:26,088 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 589 flow [2024-10-31 22:14:26,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:26,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:26,088 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:26,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:14:26,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:26,294 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:26,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1081977900, now seen corresponding path program 1 times [2024-10-31 22:14:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:26,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658328413] [2024-10-31 22:14:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:26,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:26,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658328413] [2024-10-31 22:14:26,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658328413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:26,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068306533] [2024-10-31 22:14:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:26,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:26,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:26,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:26,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:26,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:14:26,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:26,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068306533] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:26,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:26,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2024-10-31 22:14:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913780137] [2024-10-31 22:14:26,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:26,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:26,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 22:14:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 589 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:26,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 22:14:26,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:29,800 INFO L124 PetriNetUnfolderBase]: 15353/24646 cut-off events. [2024-10-31 22:14:29,800 INFO L125 PetriNetUnfolderBase]: For 39989/40815 co-relation queries the response was YES. [2024-10-31 22:14:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73414 conditions, 24646 events. 15353/24646 cut-off events. For 39989/40815 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 174313 event pairs, 6194 based on Foata normal form. 1024/22327 useless extension candidates. Maximal degree in co-relation 71633. Up to 8983 conditions per place. [2024-10-31 22:14:30,022 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 125 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-10-31 22:14:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 167 transitions, 1490 flow [2024-10-31 22:14:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-31 22:14:30,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7569444444444444 [2024-10-31 22:14:30,025 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 589 flow. Second operand 4 states and 109 transitions. [2024-10-31 22:14:30,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 167 transitions, 1490 flow [2024-10-31 22:14:30,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 167 transitions, 1446 flow, removed 22 selfloop flow, removed 0 redundant places. [2024-10-31 22:14:30,183 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 819 flow [2024-10-31 22:14:30,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=819, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-10-31 22:14:30,187 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2024-10-31 22:14:30,187 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 819 flow [2024-10-31 22:14:30,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:30,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:30,188 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:30,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:30,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:30,389 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 22:14:30,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1913882398, now seen corresponding path program 6 times [2024-10-31 22:14:30,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:30,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523688735] [2024-10-31 22:14:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:30,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523688735] [2024-10-31 22:14:30,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523688735] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:30,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731178064] [2024-10-31 22:14:30,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:14:30,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:30,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:30,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deadee8f-ed9b-44ed-ad38-71ce80680369/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:30,989 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:14:30,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:30,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:14:30,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:31,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:31,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731178064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:31,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 15 [2024-10-31 22:14:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806792185] [2024-10-31 22:14:31,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:31,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:31,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:31,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 22:14:31,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 819 flow. Second operand has 16 states, 16 states have (on average 12.3125) internal successors, (197), 16 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:31,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:31,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 22:14:31,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:40,068 INFO L124 PetriNetUnfolderBase]: 43127/65083 cut-off events. [2024-10-31 22:14:40,069 INFO L125 PetriNetUnfolderBase]: For 147443/147822 co-relation queries the response was YES. [2024-10-31 22:14:40,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205838 conditions, 65083 events. 43127/65083 cut-off events. For 147443/147822 co-relation queries the response was YES. Maximal size of possible extension queue 2099. Compared 471247 event pairs, 6714 based on Foata normal form. 2161/58739 useless extension candidates. Maximal degree in co-relation 199418. Up to 15250 conditions per place. [2024-10-31 22:14:40,524 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 179 selfloop transitions, 115 changer transitions 107/409 dead transitions. [2024-10-31 22:14:40,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 409 transitions, 3739 flow [2024-10-31 22:14:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:14:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-31 22:14:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 345 transitions. [2024-10-31 22:14:40,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-31 22:14:40,526 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 819 flow. Second operand 15 states and 345 transitions. [2024-10-31 22:14:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 409 transitions, 3739 flow