./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-theta/unwind2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-theta/unwind2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB --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 84506b1a5f2f1a1be74252915eb3882c15865a3a673842f14f5796dbb89eb736 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:07:22,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:07:22,890 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:07:22,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:07:22,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:07:22,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:07:22,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:07:22,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:07:22,956 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:07:22,956 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:07:22,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:07:22,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:07:22,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:07:22,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:07:22,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:07:22,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:07:22,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:07:22,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:07:22,961 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:07:22,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:07:22,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:07:22,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:07:22,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:22,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:07:22,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:22,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:07:22,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:07:22,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:07:22,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:07:22,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:07:22,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:07:22,965 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 84506b1a5f2f1a1be74252915eb3882c15865a3a673842f14f5796dbb89eb736 [2024-11-28 02:07:23,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:07:23,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:07:23,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:07:23,374 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:07:23,375 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:07:23,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread-theta/unwind2-1.i [2024-11-28 02:07:27,008 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/data/1a9ca5049/43fcc6acb4af445a86609e12099b9be7/FLAGc78357b62 [2024-11-28 02:07:27,362 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:07:27,363 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/sv-benchmarks/c/pthread-theta/unwind2-1.i [2024-11-28 02:07:27,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/data/1a9ca5049/43fcc6acb4af445a86609e12099b9be7/FLAGc78357b62 [2024-11-28 02:07:27,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/data/1a9ca5049/43fcc6acb4af445a86609e12099b9be7 [2024-11-28 02:07:27,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:07:27,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:07:27,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:07:27,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:07:27,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:07:27,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:07:27" (1/1) ... [2024-11-28 02:07:27,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a931eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:27, skipping insertion in model container [2024-11-28 02:07:27,416 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:07:27" (1/1) ... [2024-11-28 02:07:27,459 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:07:27,865 WARN L250 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_9a92461d-0f65-4266-b83c-858a8b696cd4/sv-benchmarks/c/pthread-theta/unwind2-1.i[33026,33039] [2024-11-28 02:07:27,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:07:27,916 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:07:27,974 WARN L250 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_9a92461d-0f65-4266-b83c-858a8b696cd4/sv-benchmarks/c/pthread-theta/unwind2-1.i[33026,33039] [2024-11-28 02:07:27,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:07:28,027 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:07:28,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28 WrapperNode [2024-11-28 02:07:28,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:07:28,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:07:28,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:07:28,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:07:28,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,080 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2024-11-28 02:07:28,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:07:28,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:07:28,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:07:28,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:07:28,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,130 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]. [2024-11-28 02:07:28,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,137 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:07:28,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:07:28,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:07:28,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:07:28,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (1/1) ... [2024-11-28 02:07:28,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:28,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:07:28,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:07:28,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:07:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-28 02:07:28,249 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-28 02:07:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-28 02:07:28,249 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-28 02:07:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:07:28,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:07:28,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:07:28,251 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:07:28,437 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:07:28,439 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:07:28,625 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:07:28,625 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:07:28,756 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:07:28,756 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 02:07:28,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:07:28 BoogieIcfgContainer [2024-11-28 02:07:28,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:07:28,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:07:28,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:07:28,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:07:28,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:07:27" (1/3) ... [2024-11-28 02:07:28,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5783dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:07:28, skipping insertion in model container [2024-11-28 02:07:28,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:28" (2/3) ... [2024-11-28 02:07:28,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5783dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:07:28, skipping insertion in model container [2024-11-28 02:07:28,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:07:28" (3/3) ... [2024-11-28 02:07:28,780 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind2-1.i [2024-11-28 02:07:28,802 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:07:28,805 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind2-1.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 02:07:28,806 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:07:28,890 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 02:07:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-11-28 02:07:28,994 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-28 02:07:29,001 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 02:07:29,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-28 02:07:29,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-11-28 02:07:29,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2024-11-28 02:07:29,045 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:07:29,064 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;@57f1919c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:07:29,064 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-28 02:07:29,085 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:07:29,085 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-11-28 02:07:29,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:07:29,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:29,090 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:29,091 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:29,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1841696643, now seen corresponding path program 1 times [2024-11-28 02:07:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:29,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682319213] [2024-11-28 02:07:29,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:29,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:29,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:29,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682319213] [2024-11-28 02:07:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682319213] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:29,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:29,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:07:29,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773902611] [2024-11-28 02:07:29,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:29,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:29,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:29,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:29,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:29,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2024-11-28 02:07:29,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:29,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:29,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:30,248 INFO L124 PetriNetUnfolderBase]: 211/450 cut-off events. [2024-11-28 02:07:30,248 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-28 02:07:30,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 450 events. 211/450 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2194 event pairs, 26 based on Foata normal form. 48/420 useless extension candidates. Maximal degree in co-relation 780. Up to 153 conditions per place. [2024-11-28 02:07:30,255 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-11-28 02:07:30,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 63 transitions, 261 flow [2024-11-28 02:07:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-11-28 02:07:30,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-11-28 02:07:30,274 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 7 states and 122 transitions. [2024-11-28 02:07:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 63 transitions, 261 flow [2024-11-28 02:07:30,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 63 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:30,284 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 101 flow [2024-11-28 02:07:30,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2024-11-28 02:07:30,290 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2024-11-28 02:07:30,290 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 101 flow [2024-11-28 02:07:30,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2024-11-28 02:07:30,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:30,291 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:30,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:07:30,291 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:30,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:30,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1257990492, now seen corresponding path program 1 times [2024-11-28 02:07:30,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:30,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171293677] [2024-11-28 02:07:30,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171293677] [2024-11-28 02:07:30,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171293677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861436011] [2024-11-28 02:07:30,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:30,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:30,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:30,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:30,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:07:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:30,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:07:30,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:30,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:30,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861436011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:30,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-28 02:07:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221696399] [2024-11-28 02:07:30,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:30,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:30,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:30,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:30,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:30,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 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) [2024-11-28 02:07:30,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:30,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:30,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:31,572 INFO L124 PetriNetUnfolderBase]: 424/821 cut-off events. [2024-11-28 02:07:31,573 INFO L125 PetriNetUnfolderBase]: For 123/131 co-relation queries the response was YES. [2024-11-28 02:07:31,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 821 events. 424/821 cut-off events. For 123/131 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4339 event pairs, 61 based on Foata normal form. 8/672 useless extension candidates. Maximal degree in co-relation 1714. Up to 274 conditions per place. [2024-11-28 02:07:31,588 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 60 selfloop transitions, 14 changer transitions 3/85 dead transitions. [2024-11-28 02:07:31,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 85 transitions, 395 flow [2024-11-28 02:07:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:07:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:07:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-11-28 02:07:31,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-11-28 02:07:31,590 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 101 flow. Second operand 9 states and 147 transitions. [2024-11-28 02:07:31,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 85 transitions, 395 flow [2024-11-28 02:07:31,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 85 transitions, 384 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:31,602 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 160 flow [2024-11-28 02:07:31,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-28 02:07:31,603 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-28 02:07:31,603 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 160 flow [2024-11-28 02:07:31,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 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) [2024-11-28 02:07:31,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:31,603 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:31,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:31,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-28 02:07:31,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:31,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash -592937479, now seen corresponding path program 1 times [2024-11-28 02:07:31,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489263732] [2024-11-28 02:07:31,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:31,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:31,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489263732] [2024-11-28 02:07:31,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489263732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:31,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:31,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:07:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137583820] [2024-11-28 02:07:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:31,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:31,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:31,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:31,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:31,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2024-11-28 02:07:31,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:31,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:32,324 INFO L124 PetriNetUnfolderBase]: 425/915 cut-off events. [2024-11-28 02:07:32,325 INFO L125 PetriNetUnfolderBase]: For 933/947 co-relation queries the response was YES. [2024-11-28 02:07:32,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 915 events. 425/915 cut-off events. For 933/947 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5313 event pairs, 89 based on Foata normal form. 0/828 useless extension candidates. Maximal degree in co-relation 1816. Up to 298 conditions per place. [2024-11-28 02:07:32,333 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 70 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-28 02:07:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 88 transitions, 610 flow [2024-11-28 02:07:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-11-28 02:07:32,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-28 02:07:32,338 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 160 flow. Second operand 7 states and 112 transitions. [2024-11-28 02:07:32,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 88 transitions, 610 flow [2024-11-28 02:07:32,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 564 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-11-28 02:07:32,354 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 208 flow [2024-11-28 02:07:32,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-11-28 02:07:32,356 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2024-11-28 02:07:32,356 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 208 flow [2024-11-28 02:07:32,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2024-11-28 02:07:32,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:32,357 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:32,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:07:32,357 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:32,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash 342968995, now seen corresponding path program 2 times [2024-11-28 02:07:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:32,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117548693] [2024-11-28 02:07:32,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:32,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:32,387 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:32,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117548693] [2024-11-28 02:07:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117548693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706591695] [2024-11-28 02:07:32,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:32,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:32,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:32,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:07:32,647 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:32,647 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:32,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:07:32,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:32,772 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706591695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:32,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-28 02:07:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760568620] [2024-11-28 02:07:32,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:32,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:32,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:32,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:07:32,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:32,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-11-28 02:07:32,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:32,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:32,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:33,251 INFO L124 PetriNetUnfolderBase]: 373/802 cut-off events. [2024-11-28 02:07:33,251 INFO L125 PetriNetUnfolderBase]: For 755/765 co-relation queries the response was YES. [2024-11-28 02:07:33,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 802 events. 373/802 cut-off events. For 755/765 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4543 event pairs, 85 based on Foata normal form. 26/754 useless extension candidates. Maximal degree in co-relation 2321. Up to 309 conditions per place. [2024-11-28 02:07:33,258 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 67 selfloop transitions, 13 changer transitions 6/94 dead transitions. [2024-11-28 02:07:33,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 611 flow [2024-11-28 02:07:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:07:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-11-28 02:07:33,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-11-28 02:07:33,260 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 208 flow. Second operand 10 states and 154 transitions. [2024-11-28 02:07:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 611 flow [2024-11-28 02:07:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 578 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:33,269 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 246 flow [2024-11-28 02:07:33,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=246, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-28 02:07:33,271 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2024-11-28 02:07:33,271 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 246 flow [2024-11-28 02:07:33,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-11-28 02:07:33,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:33,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:33,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:33,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:33,475 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:33,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1201223248, now seen corresponding path program 1 times [2024-11-28 02:07:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929531492] [2024-11-28 02:07:33,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:33,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929531492] [2024-11-28 02:07:33,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929531492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:33,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961556743] [2024-11-28 02:07:33,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:33,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:33,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:07:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:33,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:07:33,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:33,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961556743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:33,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:33,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-28 02:07:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527957090] [2024-11-28 02:07:33,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:33,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:07:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:33,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:07:33,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:07:33,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:33,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 246 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 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) [2024-11-28 02:07:33,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:33,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:34,394 INFO L124 PetriNetUnfolderBase]: 437/919 cut-off events. [2024-11-28 02:07:34,397 INFO L125 PetriNetUnfolderBase]: For 1262/1280 co-relation queries the response was YES. [2024-11-28 02:07:34,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2865 conditions, 919 events. 437/919 cut-off events. For 1262/1280 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5274 event pairs, 108 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 2600. Up to 351 conditions per place. [2024-11-28 02:07:34,407 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 76 selfloop transitions, 15 changer transitions 1/100 dead transitions. [2024-11-28 02:07:34,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 761 flow [2024-11-28 02:07:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:07:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:07:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-28 02:07:34,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-28 02:07:34,411 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 246 flow. Second operand 9 states and 144 transitions. [2024-11-28 02:07:34,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 761 flow [2024-11-28 02:07:34,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 741 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:34,423 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 298 flow [2024-11-28 02:07:34,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=234, 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=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2024-11-28 02:07:34,425 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-11-28 02:07:34,427 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 298 flow [2024-11-28 02:07:34,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 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) [2024-11-28 02:07:34,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:34,428 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:34,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:34,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:34,633 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:34,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1929875536, now seen corresponding path program 1 times [2024-11-28 02:07:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070286937] [2024-11-28 02:07:34,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070286937] [2024-11-28 02:07:34,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070286937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:34,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:34,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:07:34,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766641480] [2024-11-28 02:07:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:34,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:34,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:34,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:34,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:34,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-28 02:07:34,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:34,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:35,076 INFO L124 PetriNetUnfolderBase]: 395/833 cut-off events. [2024-11-28 02:07:35,076 INFO L125 PetriNetUnfolderBase]: For 1439/1455 co-relation queries the response was YES. [2024-11-28 02:07:35,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 833 events. 395/833 cut-off events. For 1439/1455 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4551 event pairs, 115 based on Foata normal form. 12/772 useless extension candidates. Maximal degree in co-relation 2682. Up to 417 conditions per place. [2024-11-28 02:07:35,086 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 47 selfloop transitions, 12 changer transitions 1/67 dead transitions. [2024-11-28 02:07:35,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 545 flow [2024-11-28 02:07:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:07:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:07:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-11-28 02:07:35,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-28 02:07:35,089 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 298 flow. Second operand 6 states and 93 transitions. [2024-11-28 02:07:35,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 545 flow [2024-11-28 02:07:35,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 496 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-28 02:07:35,104 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 279 flow [2024-11-28 02:07:35,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-11-28 02:07:35,105 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-11-28 02:07:35,105 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 279 flow [2024-11-28 02:07:35,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-28 02:07:35,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:35,106 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:35,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:07:35,106 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:35,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392078, now seen corresponding path program 1 times [2024-11-28 02:07:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:35,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544039259] [2024-11-28 02:07:35,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544039259] [2024-11-28 02:07:35,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544039259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:35,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:35,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:07:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201344477] [2024-11-28 02:07:35,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:35,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:07:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:35,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:07:35,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:07:35,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-28 02:07:35,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-28 02:07:35,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:35,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-28 02:07:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:35,557 INFO L124 PetriNetUnfolderBase]: 409/878 cut-off events. [2024-11-28 02:07:35,557 INFO L125 PetriNetUnfolderBase]: For 1516/1540 co-relation queries the response was YES. [2024-11-28 02:07:35,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 878 events. 409/878 cut-off events. For 1516/1540 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4918 event pairs, 114 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2811. Up to 439 conditions per place. [2024-11-28 02:07:35,567 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 51 selfloop transitions, 12 changer transitions 2/72 dead transitions. [2024-11-28 02:07:35,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 551 flow [2024-11-28 02:07:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:07:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:07:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-28 02:07:35,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-11-28 02:07:35,568 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 279 flow. Second operand 6 states and 97 transitions. [2024-11-28 02:07:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 551 flow [2024-11-28 02:07:35,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 522 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-28 02:07:35,580 INFO L231 Difference]: Finished difference. Result has 65 places, 46 transitions, 296 flow [2024-11-28 02:07:35,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=65, PETRI_TRANSITIONS=46} [2024-11-28 02:07:35,581 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-11-28 02:07:35,581 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 46 transitions, 296 flow [2024-11-28 02:07:35,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-28 02:07:35,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:35,581 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:35,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:07:35,582 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:35,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1416754393, now seen corresponding path program 2 times [2024-11-28 02:07:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115117466] [2024-11-28 02:07:35,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:35,605 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:35,605 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115117466] [2024-11-28 02:07:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115117466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413248993] [2024-11-28 02:07:35,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:35,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:35,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:07:35,956 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:35,956 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:35,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:07:35,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:36,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:36,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413248993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:36,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:36,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 02:07:36,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90449333] [2024-11-28 02:07:36,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:36,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:07:36,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:36,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:07:36,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:07:36,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-11-28 02:07:36,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 46 transitions, 296 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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) [2024-11-28 02:07:36,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:36,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-11-28 02:07:36,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:37,378 INFO L124 PetriNetUnfolderBase]: 751/1392 cut-off events. [2024-11-28 02:07:37,378 INFO L125 PetriNetUnfolderBase]: For 2958/3010 co-relation queries the response was YES. [2024-11-28 02:07:37,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 1392 events. 751/1392 cut-off events. For 2958/3010 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7668 event pairs, 127 based on Foata normal form. 0/1264 useless extension candidates. Maximal degree in co-relation 4610. Up to 375 conditions per place. [2024-11-28 02:07:37,392 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 22 changer transitions 31/164 dead transitions. [2024-11-28 02:07:37,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 164 transitions, 1325 flow [2024-11-28 02:07:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:07:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 02:07:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 216 transitions. [2024-11-28 02:07:37,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-28 02:07:37,395 INFO L175 Difference]: Start difference. First operand has 65 places, 46 transitions, 296 flow. Second operand 15 states and 216 transitions. [2024-11-28 02:07:37,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 164 transitions, 1325 flow [2024-11-28 02:07:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 164 transitions, 1284 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:37,416 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 409 flow [2024-11-28 02:07:37,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=409, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2024-11-28 02:07:37,417 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-11-28 02:07:37,417 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 409 flow [2024-11-28 02:07:37,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 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) [2024-11-28 02:07:37,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:37,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:37,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:07:37,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:37,618 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-28 02:07:37,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash -580451013, now seen corresponding path program 1 times [2024-11-28 02:07:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:37,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732722618] [2024-11-28 02:07:37,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:07:37,632 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 02:07:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 02:07:37,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 02:07:37,657 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 02:07:37,658 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-11-28 02:07:37,660 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-28 02:07:37,660 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-28 02:07:37,661 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-28 02:07:37,661 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-28 02:07:37,661 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-28 02:07:37,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:07:37,662 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-11-28 02:07:37,695 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 02:07:37,696 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 02:07:37,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:07:37 BasicIcfg [2024-11-28 02:07:37,703 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 02:07:37,704 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 02:07:37,704 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 02:07:37,704 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 02:07:37,705 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:07:28" (3/4) ... [2024-11-28 02:07:37,706 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 02:07:37,762 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 8. [2024-11-28 02:07:37,819 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 02:07:37,820 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 02:07:37,820 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 02:07:37,823 INFO L158 Benchmark]: Toolchain (without parser) took 10416.17ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 91.3MB in the beginning and 58.4MB in the end (delta: 32.9MB). Peak memory consumption was 60.0MB. Max. memory is 16.1GB. [2024-11-28 02:07:37,824 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 117.4MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:37,824 INFO L158 Benchmark]: CACSL2BoogieTranslator took 621.87ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 70.8MB in the end (delta: 20.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:07:37,824 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.02ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 69.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:37,825 INFO L158 Benchmark]: Boogie Preprocessor took 67.40ms. Allocated memory is still 117.4MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:37,825 INFO L158 Benchmark]: RCFGBuilder took 607.95ms. Allocated memory is still 117.4MB. Free memory was 67.4MB in the beginning and 48.2MB in the end (delta: 19.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:07:37,826 INFO L158 Benchmark]: TraceAbstraction took 8941.88ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 47.6MB in the beginning and 63.4MB in the end (delta: -15.8MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2024-11-28 02:07:37,826 INFO L158 Benchmark]: Witness Printer took 116.29ms. Allocated memory is still 142.6MB. Free memory was 63.4MB in the beginning and 58.4MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:07:37,829 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 117.4MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 621.87ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 70.8MB in the end (delta: 20.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.02ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 69.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 67.40ms. Allocated memory is still 117.4MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 607.95ms. Allocated memory is still 117.4MB. Free memory was 67.4MB in the beginning and 48.2MB in the end (delta: 19.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 8941.88ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 47.6MB in the beginning and 63.4MB in the end (delta: -15.8MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. * Witness Printer took 116.29ms. Allocated memory is still 142.6MB. Free memory was 63.4MB in the beginning and 58.4MB in the end (delta: 5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L775] 0 _N = 1 [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=1, limit=0, t1=0] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=1, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=1, limit=0, t1=0, t2=1] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=2, limit=0] [L768] 2 limit = lim VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=2, limit=2] [L759] 1 limit = lim VAL [\old(arg)={0:0}, _N=1, arg={0:0}, lim=1, limit=1] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\old(arg)={0:0}, _N=1, arg={0:0}, bound=1, i=0, lim=2, limit=1] [L770] COND TRUE 2 i < bound [L770] 2 i++ VAL [\old(arg)={0:0}, _N=1, arg={0:0}, bound=1, i=1, lim=2, limit=1] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\old(expression)=0, _N=1, expression=0, limit=1] [L753] 2 reach_error() VAL [\old(expression)=0, _N=1, expression=0, limit=1] - UnprovableResult [Line: 779]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 778]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 753]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.7s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 837 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 825 mSDsluCounter, 170 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 136 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1416 IncrementalHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 34 mSDtfsCounter, 1416 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=409occurred in iteration=8, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 555 SizeOfPredicates, 18 NumberOfNonLiveVariables, 274 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 5/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 02:07:37,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a92461d-0f65-4266-b83c-858a8b696cd4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE