./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c --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_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/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_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/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_e28dd344-abd0-474d-8d97-73c3cd1bff59/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 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:06:48,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:06:48,787 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:06:48,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:06:48,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:06:48,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:06:48,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:06:48,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:06:48,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:06:48,849 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:06:48,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:06:48,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:06:48,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:06:48,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:06:48,850 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:06:48,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:06:48,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:06:48,850 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:06:48,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:06:48,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:06:48,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:06:48,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:06:48,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:06:48,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:06:48,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:06:48,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:06:48,854 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:06:48,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:06:48,854 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:06:48,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:06:48,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:06:48,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:06:48,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:06:48,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:06:48,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:06:48,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:06:48,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:06:48,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:06:48,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:06:48,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:06:48,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:06:48,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:06:48,857 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_e28dd344-abd0-474d-8d97-73c3cd1bff59/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 -> 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b [2024-11-27 20:06:49,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:06:49,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:06:49,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:06:49,298 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:06:49,299 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:06:49,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2024-11-27 20:06:53,263 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/data/fcaaa28d2/8a1a9712ebec40e2b858051161b4a879/FLAGe154afe28 [2024-11-27 20:06:53,559 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:06:53,560 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2024-11-27 20:06:53,573 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/data/fcaaa28d2/8a1a9712ebec40e2b858051161b4a879/FLAGe154afe28 [2024-11-27 20:06:53,601 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/data/fcaaa28d2/8a1a9712ebec40e2b858051161b4a879 [2024-11-27 20:06:53,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:06:53,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:06:53,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:06:53,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:06:53,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:06:53,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:53,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbc371e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53, skipping insertion in model container [2024-11-27 20:06:53,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:53,647 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:06:53,902 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_e28dd344-abd0-474d-8d97-73c3cd1bff59/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c[950,963] [2024-11-27 20:06:53,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:06:53,921 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:06:53,943 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_e28dd344-abd0-474d-8d97-73c3cd1bff59/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c[950,963] [2024-11-27 20:06:53,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:06:53,968 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:06:53,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53 WrapperNode [2024-11-27 20:06:53,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:06:53,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:06:53,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:06:53,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:06:53,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:53,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,019 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-27 20:06:54,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:06:54,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:06:54,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:06:54,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:06:54,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,039 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,060 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]. [2024-11-27 20:06:54,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,068 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,077 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:06:54,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:06:54,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:06:54,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:06:54,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (1/1) ... [2024-11-27 20:06:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:06:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:54,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:06:54,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:06:54,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:06:54,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:06:54,181 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-27 20:06:54,182 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-27 20:06:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-27 20:06:54,182 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-27 20:06:54,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:06:54,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:06:54,266 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:06:54,271 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:06:54,469 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-27 20:06:54,469 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:06:54,486 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:06:54,486 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 20:06:54,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:06:54 BoogieIcfgContainer [2024-11-27 20:06:54,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:06:54,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:06:54,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:06:54,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:06:54,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:06:53" (1/3) ... [2024-11-27 20:06:54,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a638ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:06:54, skipping insertion in model container [2024-11-27 20:06:54,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:06:53" (2/3) ... [2024-11-27 20:06:54,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a638ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:06:54, skipping insertion in model container [2024-11-27 20:06:54,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:06:54" (3/3) ... [2024-11-27 20:06:54,505 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-1.c [2024-11-27 20:06:54,528 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:06:54,532 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_15-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 20:06:54,637 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:06:54,660 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;@7177b8ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:06:54,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:06:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:06:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:06:54,677 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:54,678 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:54,678 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:54,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-27 20:06:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:54,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818075788] [2024-11-27 20:06:54,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:06:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818075788] [2024-11-27 20:06:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818075788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:06:55,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:06:55,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:06:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138857428] [2024-11-27 20:06:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:06:55,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:06:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:55,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:06:55,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:06:55,140 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:06:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:55,208 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-27 20:06:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:06:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-27 20:06:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:55,220 INFO L225 Difference]: With dead ends: 39 [2024-11-27 20:06:55,220 INFO L226 Difference]: Without dead ends: 27 [2024-11-27 20:06:55,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:06:55,231 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:55,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:06:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-27 20:06:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-27 20:06:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 20:06:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-27 20:06:55,281 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-27 20:06:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:55,281 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-27 20:06:55,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:06:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-27 20:06:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 20:06:55,283 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:55,284 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:55,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:06:55,284 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:55,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:55,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-27 20:06:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927368827] [2024-11-27 20:06:55,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:55,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:06:55,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927368827] [2024-11-27 20:06:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927368827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:06:55,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:06:55,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:06:55,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069094229] [2024-11-27 20:06:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:06:55,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:06:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:55,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:06:55,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:06:55,432 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:06:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:55,466 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-27 20:06:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:06:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-27 20:06:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:55,468 INFO L225 Difference]: With dead ends: 33 [2024-11-27 20:06:55,468 INFO L226 Difference]: Without dead ends: 29 [2024-11-27 20:06:55,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:06:55,470 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:55,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:06:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-27 20:06:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-27 20:06:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 20:06:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-27 20:06:55,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-27 20:06:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:55,480 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-27 20:06:55,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:06:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-27 20:06:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 20:06:55,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:55,482 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:55,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:06:55,483 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:55,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-27 20:06:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231191952] [2024-11-27 20:06:55,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:55,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:55,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231191952] [2024-11-27 20:06:55,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231191952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:06:55,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559451283] [2024-11-27 20:06:55,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:55,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:55,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:55,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:06:55,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:06:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:55,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:06:55,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:06:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:56,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:06:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:56,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559451283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:06:56,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:06:56,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-27 20:06:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522543388] [2024-11-27 20:06:56,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:06:56,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:06:56,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:56,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:06:56,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:06:56,492 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:06:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:56,734 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-27 20:06:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:06:56,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-27 20:06:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:56,737 INFO L225 Difference]: With dead ends: 55 [2024-11-27 20:06:56,737 INFO L226 Difference]: Without dead ends: 31 [2024-11-27 20:06:56,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:06:56,739 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:56,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:06:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-27 20:06:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-27 20:06:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-27 20:06:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-27 20:06:56,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-27 20:06:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:56,763 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-27 20:06:56,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:06:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-27 20:06:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 20:06:56,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:56,765 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:56,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:06:56,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:56,966 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:56,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-27 20:06:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:56,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507604954] [2024-11-27 20:06:56,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:57,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:57,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507604954] [2024-11-27 20:06:57,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507604954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:06:57,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847390106] [2024-11-27 20:06:57,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:57,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:57,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:06:57,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:06:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:57,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:06:57,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:06:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:57,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:06:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:06:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847390106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:06:57,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:06:57,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-27 20:06:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50829889] [2024-11-27 20:06:57,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:06:57,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:06:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:57,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:06:57,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:06:57,683 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:06:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:57,940 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-27 20:06:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:06:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-27 20:06:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:57,943 INFO L225 Difference]: With dead ends: 40 [2024-11-27 20:06:57,943 INFO L226 Difference]: Without dead ends: 36 [2024-11-27 20:06:57,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:06:57,944 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:57,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:06:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-27 20:06:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-27 20:06:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-27 20:06:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-27 20:06:57,958 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-27 20:06:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:57,959 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-27 20:06:57,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:06:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-27 20:06:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 20:06:57,960 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:57,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:57,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:06:58,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:58,166 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:58,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-27 20:06:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:58,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145568098] [2024-11-27 20:06:58,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:58,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:06:58,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145568098] [2024-11-27 20:06:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145568098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:06:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806646783] [2024-11-27 20:06:58,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:58,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:58,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:58,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:06:58,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:06:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:58,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:06:58,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:06:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:06:58,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:06:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:06:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806646783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:06:59,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:06:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-27 20:06:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467328296] [2024-11-27 20:06:59,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:06:59,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:06:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:06:59,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:06:59,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:06:59,231 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-27 20:06:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:06:59,514 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-27 20:06:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:06:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-27 20:06:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:06:59,518 INFO L225 Difference]: With dead ends: 69 [2024-11-27 20:06:59,522 INFO L226 Difference]: Without dead ends: 38 [2024-11-27 20:06:59,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:06:59,524 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:06:59,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:06:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-27 20:06:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-27 20:06:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-27 20:06:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-27 20:06:59,541 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-27 20:06:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:06:59,542 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-27 20:06:59,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-27 20:06:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-27 20:06:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 20:06:59,547 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:06:59,547 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:06:59,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:06:59,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:59,748 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:06:59,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:06:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-27 20:06:59,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:06:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378049810] [2024-11-27 20:06:59,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:06:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:06:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 20:06:59,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:06:59,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378049810] [2024-11-27 20:06:59,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378049810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:06:59,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258664172] [2024-11-27 20:06:59,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:06:59,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:06:59,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:06:59,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:06:59,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:07:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:00,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:07:00,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:07:00,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:07:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258664172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:00,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:00,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-27 20:07:00,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324291152] [2024-11-27 20:07:00,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:00,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:07:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:00,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:07:00,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:07:00,765 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-27 20:07:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:01,458 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-27 20:07:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:07:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-11-27 20:07:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:01,461 INFO L225 Difference]: With dead ends: 101 [2024-11-27 20:07:01,461 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 20:07:01,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:07:01,464 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:01,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:07:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 20:07:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-27 20:07:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-27 20:07:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-27 20:07:01,485 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-27 20:07:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:01,486 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-27 20:07:01,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-27 20:07:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-27 20:07:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-27 20:07:01,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:01,490 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:01,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:01,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:01,695 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:01,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-27 20:07:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:01,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011403805] [2024-11-27 20:07:01,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:01,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:07:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011403805] [2024-11-27 20:07:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011403805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785694976] [2024-11-27 20:07:01,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:01,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:01,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:01,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:07:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:01,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:07:01,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:07:02,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:07:03,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785694976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:03,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:03,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-27 20:07:03,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034846172] [2024-11-27 20:07:03,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:03,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:07:03,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:03,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:07:03,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:07:03,005 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-27 20:07:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:03,360 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-27 20:07:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:07:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-11-27 20:07:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:03,366 INFO L225 Difference]: With dead ends: 102 [2024-11-27 20:07:03,370 INFO L226 Difference]: Without dead ends: 98 [2024-11-27 20:07:03,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:07:03,372 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:03,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-27 20:07:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-27 20:07:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-27 20:07:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-27 20:07:03,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-27 20:07:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:03,421 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-27 20:07:03,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-27 20:07:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-27 20:07:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-27 20:07:03,430 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:03,431 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:03,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:07:03,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:07:03,636 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:03,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-11-27 20:07:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:03,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051837069] [2024-11-27 20:07:03,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:03,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-27 20:07:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051837069] [2024-11-27 20:07:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051837069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911104762] [2024-11-27 20:07:04,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:04,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:04,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:04,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:07:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:04,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:07:04,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-27 20:07:04,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-27 20:07:05,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911104762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:05,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:05,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-27 20:07:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855111690] [2024-11-27 20:07:05,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:05,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 20:07:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:05,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 20:07:05,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:07:05,965 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-27 20:07:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:06,951 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-27 20:07:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 20:07:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2024-11-27 20:07:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:06,956 INFO L225 Difference]: With dead ends: 177 [2024-11-27 20:07:06,959 INFO L226 Difference]: Without dead ends: 104 [2024-11-27 20:07:06,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 20:07:06,968 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:06,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:07:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-27 20:07:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-27 20:07:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-11-27 20:07:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-27 20:07:07,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-11-27 20:07:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:07,022 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-27 20:07:07,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-27 20:07:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-27 20:07:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-27 20:07:07,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:07,030 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:07,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:07,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 20:07:07,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:07,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-11-27 20:07:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:07,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565072368] [2024-11-27 20:07:07,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-11-27 20:07:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565072368] [2024-11-27 20:07:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565072368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927424163] [2024-11-27 20:07:07,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:07:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:07,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:07,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:07:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:07,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:07:07,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-27 20:07:08,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-27 20:07:10,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927424163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:10,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:10,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-27 20:07:10,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139438319] [2024-11-27 20:07:10,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:10,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 20:07:10,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:10,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 20:07:10,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:07:10,100 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-27 20:07:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:10,630 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-27 20:07:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:07:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2024-11-27 20:07:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:10,635 INFO L225 Difference]: With dead ends: 132 [2024-11-27 20:07:10,635 INFO L226 Difference]: Without dead ends: 128 [2024-11-27 20:07:10,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-27 20:07:10,638 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:10,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:07:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-27 20:07:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-27 20:07:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-11-27 20:07:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-27 20:07:10,668 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-11-27 20:07:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:10,669 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-27 20:07:10,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-27 20:07:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-27 20:07:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-27 20:07:10,675 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:10,675 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:10,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:10,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 20:07:10,879 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:10,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-27 20:07:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:10,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950965206] [2024-11-27 20:07:10,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:10,988 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:10,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-27 20:07:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950965206] [2024-11-27 20:07:11,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950965206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:11,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826926480] [2024-11-27 20:07:11,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:11,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:11,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:11,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:07:11,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:11,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:11,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:07:11,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-11-27 20:07:12,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-11-27 20:07:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826926480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:15,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:15,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-27 20:07:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348089631] [2024-11-27 20:07:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:15,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 20:07:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:15,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 20:07:15,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-27 20:07:15,573 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-27 20:07:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:16,844 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-27 20:07:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 20:07:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-11-27 20:07:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:16,851 INFO L225 Difference]: With dead ends: 323 [2024-11-27 20:07:16,854 INFO L226 Difference]: Without dead ends: 214 [2024-11-27 20:07:16,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-27 20:07:16,859 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:16,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:07:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-27 20:07:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-27 20:07:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-11-27 20:07:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-27 20:07:16,923 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-27 20:07:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:16,925 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-27 20:07:16,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-27 20:07:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-27 20:07:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-11-27 20:07:16,937 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:16,939 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:16,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:07:17,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 20:07:17,143 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:17,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-11-27 20:07:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157607851] [2024-11-27 20:07:17,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:07:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:17,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-27 20:07:17,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-11-27 20:07:17,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:17,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157607851] [2024-11-27 20:07:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157607851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:17,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969886006] [2024-11-27 20:07:17,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:07:17,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:17,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:17,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:07:17,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-27 20:07:17,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:17,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:07:17,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-11-27 20:07:17,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-11-27 20:07:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969886006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-11-27 20:07:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54997493] [2024-11-27 20:07:19,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:19,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:07:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:19,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:07:19,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:07:19,830 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-27 20:07:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:20,160 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-11-27 20:07:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:07:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-11-27 20:07:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:20,167 INFO L225 Difference]: With dead ends: 255 [2024-11-27 20:07:20,167 INFO L226 Difference]: Without dead ends: 251 [2024-11-27 20:07:20,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:07:20,169 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:20,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-27 20:07:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-11-27 20:07:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-11-27 20:07:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-11-27 20:07:20,212 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-11-27 20:07:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:20,214 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-11-27 20:07:20,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-27 20:07:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-11-27 20:07:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-11-27 20:07:20,227 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:20,228 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:20,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:07:20,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:07:20,432 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:20,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-11-27 20:07:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:20,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538674411] [2024-11-27 20:07:20,433 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:07:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:20,511 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:07:20,511 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 182 proven. 720 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2024-11-27 20:07:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538674411] [2024-11-27 20:07:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538674411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707441592] [2024-11-27 20:07:20,990 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:07:20,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:20,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:20,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:07:21,296 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:07:21,297 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:21,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:07:21,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 1267 proven. 6 refuted. 0 times theorem prover too weak. 5710 trivial. 0 not checked. [2024-11-27 20:07:21,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 188 proven. 860 refuted. 0 times theorem prover too weak. 5935 trivial. 0 not checked. [2024-11-27 20:07:23,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707441592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:23,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:23,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-27 20:07:23,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314985180] [2024-11-27 20:07:23,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:23,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:07:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:23,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:07:23,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:07:23,803 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-27 20:07:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:24,054 INFO L93 Difference]: Finished difference Result 412 states and 767 transitions. [2024-11-27 20:07:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:07:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 484 [2024-11-27 20:07:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:24,059 INFO L225 Difference]: With dead ends: 412 [2024-11-27 20:07:24,059 INFO L226 Difference]: Without dead ends: 193 [2024-11-27 20:07:24,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:07:24,063 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:24,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-27 20:07:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2024-11-27 20:07:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.16) internal successors, (145), 124 states have internal predecessors, (145), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (112), 42 states have call predecessors, (112), 37 states have call successors, (112) [2024-11-27 20:07:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2024-11-27 20:07:24,096 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 484 [2024-11-27 20:07:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:24,097 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2024-11-27 20:07:24,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-27 20:07:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2024-11-27 20:07:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2024-11-27 20:07:24,107 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:24,108 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:24,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:07:24,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:24,309 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:24,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -240108639, now seen corresponding path program 5 times [2024-11-27 20:07:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:24,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981871445] [2024-11-27 20:07:24,309 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:07:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:24,334 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:07:24,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-27 20:07:24,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981871445] [2024-11-27 20:07:24,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981871445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190266015] [2024-11-27 20:07:24,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:07:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:24,482 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:07:24,651 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:07:24,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:24,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:07:24,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 1045 proven. 13 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2024-11-27 20:07:24,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3476 backedges. 183 proven. 538 refuted. 0 times theorem prover too weak. 2755 trivial. 0 not checked. [2024-11-27 20:07:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190266015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:26,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2024-11-27 20:07:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378683633] [2024-11-27 20:07:26,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:26,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:07:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:26,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:07:26,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:07:26,699 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-27 20:07:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:26,910 INFO L93 Difference]: Finished difference Result 345 states and 585 transitions. [2024-11-27 20:07:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:07:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 351 [2024-11-27 20:07:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:26,915 INFO L225 Difference]: With dead ends: 345 [2024-11-27 20:07:26,915 INFO L226 Difference]: Without dead ends: 147 [2024-11-27 20:07:26,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 692 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:07:26,922 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:26,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 163 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:07:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-27 20:07:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-27 20:07:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 18 states have return successors, (77), 29 states have call predecessors, (77), 27 states have call successors, (77) [2024-11-27 20:07:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2024-11-27 20:07:26,947 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 351 [2024-11-27 20:07:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:26,948 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2024-11-27 20:07:26,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-27 20:07:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2024-11-27 20:07:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2024-11-27 20:07:26,953 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:26,953 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:26,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:07:27,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:07:27,157 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:27,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash 5991049, now seen corresponding path program 6 times [2024-11-27 20:07:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:27,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414618638] [2024-11-27 20:07:27,158 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:07:27,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:27,297 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-27 20:07:27,297 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 785 proven. 94 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2024-11-27 20:07:27,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414618638] [2024-11-27 20:07:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414618638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:27,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499058233] [2024-11-27 20:07:27,874 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:07:27,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:27,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:27,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:07:28,174 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-27 20:07:28,175 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:28,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:07:28,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 253 proven. 611 refuted. 0 times theorem prover too weak. 3815 trivial. 0 not checked. [2024-11-27 20:07:28,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4679 backedges. 255 proven. 625 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2024-11-27 20:07:31,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499058233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:31,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 28 [2024-11-27 20:07:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773092917] [2024-11-27 20:07:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:31,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 20:07:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:31,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 20:07:31,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-27 20:07:31,498 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-27 20:07:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:32,778 INFO L93 Difference]: Finished difference Result 423 states and 742 transitions. [2024-11-27 20:07:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-27 20:07:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) Word has length 405 [2024-11-27 20:07:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:32,784 INFO L225 Difference]: With dead ends: 423 [2024-11-27 20:07:32,784 INFO L226 Difference]: Without dead ends: 278 [2024-11-27 20:07:32,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 791 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2024-11-27 20:07:32,788 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:32,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 362 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:07:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-27 20:07:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 199. [2024-11-27 20:07:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 134 states have internal predecessors, (161), 41 states have call successors, (41), 24 states have call predecessors, (41), 21 states have return successors, (119), 40 states have call predecessors, (119), 41 states have call successors, (119) [2024-11-27 20:07:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 321 transitions. [2024-11-27 20:07:32,830 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 321 transitions. Word has length 405 [2024-11-27 20:07:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:32,833 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 321 transitions. [2024-11-27 20:07:32,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (33), 16 states have call predecessors, (33), 18 states have call successors, (33) [2024-11-27 20:07:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 321 transitions. [2024-11-27 20:07:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2024-11-27 20:07:32,862 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:32,862 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 39, 39, 32, 32, 21, 21, 21, 21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 19, 13, 11, 10, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:32,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:33,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:07:33,063 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:33,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1971672074, now seen corresponding path program 7 times [2024-11-27 20:07:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909625094] [2024-11-27 20:07:33,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:07:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8924 backedges. 201 proven. 1414 refuted. 0 times theorem prover too weak. 7309 trivial. 0 not checked. [2024-11-27 20:07:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909625094] [2024-11-27 20:07:34,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909625094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293045477] [2024-11-27 20:07:34,341 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:07:34,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:34,345 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:34,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:07:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:07:34,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:07:34,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8924 backedges. 201 proven. 1414 refuted. 0 times theorem prover too weak. 7309 trivial. 0 not checked. [2024-11-27 20:07:34,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8924 backedges. 201 proven. 1447 refuted. 0 times theorem prover too weak. 7276 trivial. 0 not checked. [2024-11-27 20:07:39,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293045477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:39,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:39,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-11-27 20:07:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243040237] [2024-11-27 20:07:39,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:39,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:07:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:39,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:07:39,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:07:39,829 INFO L87 Difference]: Start difference. First operand 199 states and 321 transitions. Second operand has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-27 20:07:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:40,220 INFO L93 Difference]: Finished difference Result 228 states and 388 transitions. [2024-11-27 20:07:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:07:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 554 [2024-11-27 20:07:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:40,229 INFO L225 Difference]: With dead ends: 228 [2024-11-27 20:07:40,230 INFO L226 Difference]: Without dead ends: 222 [2024-11-27 20:07:40,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 1097 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-11-27 20:07:40,234 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:40,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 215 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:07:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-27 20:07:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2024-11-27 20:07:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 143 states have internal predecessors, (170), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (150), 46 states have call predecessors, (150), 44 states have call successors, (150) [2024-11-27 20:07:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 364 transitions. [2024-11-27 20:07:40,277 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 364 transitions. Word has length 554 [2024-11-27 20:07:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:40,280 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 364 transitions. [2024-11-27 20:07:40,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.75) internal successors, (75), 22 states have internal predecessors, (75), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-27 20:07:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 364 transitions. [2024-11-27 20:07:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2024-11-27 20:07:40,287 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:40,287 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:40,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:07:40,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 20:07:40,488 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:40,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:40,489 INFO L85 PathProgramCache]: Analyzing trace with hash 42954652, now seen corresponding path program 8 times [2024-11-27 20:07:40,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298484574] [2024-11-27 20:07:40,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:40,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:40,598 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:40,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 339 proven. 925 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2024-11-27 20:07:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298484574] [2024-11-27 20:07:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298484574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343372081] [2024-11-27 20:07:41,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:07:41,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:41,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:07:41,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:07:41,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:41,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:07:41,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 223 proven. 1375 refuted. 0 times theorem prover too weak. 5663 trivial. 0 not checked. [2024-11-27 20:07:42,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 223 proven. 1419 refuted. 0 times theorem prover too weak. 5619 trivial. 0 not checked. [2024-11-27 20:07:47,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343372081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:47,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:47,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-27 20:07:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507617746] [2024-11-27 20:07:47,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:47,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 20:07:47,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:47,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 20:07:47,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-27 20:07:47,669 INFO L87 Difference]: Start difference. First operand 214 states and 364 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-27 20:07:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:48,205 INFO L93 Difference]: Finished difference Result 256 states and 481 transitions. [2024-11-27 20:07:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 20:07:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 501 [2024-11-27 20:07:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:48,213 INFO L225 Difference]: With dead ends: 256 [2024-11-27 20:07:48,213 INFO L226 Difference]: Without dead ends: 248 [2024-11-27 20:07:48,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 982 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 20:07:48,217 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:48,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:07:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-27 20:07:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2024-11-27 20:07:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 149 states have (on average 1.167785234899329) internal successors, (174), 147 states have internal predecessors, (174), 44 states have call successors, (44), 24 states have call predecessors, (44), 26 states have return successors, (153), 48 states have call predecessors, (153), 44 states have call successors, (153) [2024-11-27 20:07:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 371 transitions. [2024-11-27 20:07:48,281 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 371 transitions. Word has length 501 [2024-11-27 20:07:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:48,282 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 371 transitions. [2024-11-27 20:07:48,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-27 20:07:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 371 transitions. [2024-11-27 20:07:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1538 [2024-11-27 20:07:48,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:48,330 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 99, 99, 92, 91, 63, 63, 63, 63, 63, 63, 63, 49, 49, 49, 49, 49, 49, 49, 42, 35, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:48,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:07:48,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:07:48,534 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:48,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1512708500, now seen corresponding path program 9 times [2024-11-27 20:07:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:48,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225426704] [2024-11-27 20:07:48,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:07:48,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:48,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 20:07:48,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 71701 backedges. 2875 proven. 68 refuted. 0 times theorem prover too weak. 68758 trivial. 0 not checked. [2024-11-27 20:07:48,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:48,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225426704] [2024-11-27 20:07:48,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225426704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:48,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844869658] [2024-11-27 20:07:48,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:07:48,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:48,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:48,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:07:49,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 20:07:49,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:49,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:07:49,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 71701 backedges. 8000 proven. 7 refuted. 0 times theorem prover too weak. 63694 trivial. 0 not checked. [2024-11-27 20:07:49,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:07:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 71701 backedges. 3313 proven. 89 refuted. 0 times theorem prover too weak. 68299 trivial. 0 not checked. [2024-11-27 20:07:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844869658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:07:55,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:07:55,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 15 [2024-11-27 20:07:55,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733612478] [2024-11-27 20:07:55,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:07:55,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:07:55,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:07:55,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:07:55,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:07:55,739 INFO L87 Difference]: Start difference. First operand 220 states and 371 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (18), 2 states have call predecessors, (18), 7 states have return successors, (25), 6 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-27 20:07:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:07:56,085 INFO L93 Difference]: Finished difference Result 435 states and 841 transitions. [2024-11-27 20:07:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:07:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (18), 2 states have call predecessors, (18), 7 states have return successors, (25), 6 states have call predecessors, (25), 8 states have call successors, (25) Word has length 1537 [2024-11-27 20:07:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:07:56,091 INFO L225 Difference]: With dead ends: 435 [2024-11-27 20:07:56,091 INFO L226 Difference]: Without dead ends: 221 [2024-11-27 20:07:56,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3088 GetRequests, 3064 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:07:56,095 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:07:56,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 176 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:07:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-27 20:07:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2024-11-27 20:07:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 142 states have internal predecessors, (168), 42 states have call successors, (42), 24 states have call predecessors, (42), 25 states have return successors, (148), 46 states have call predecessors, (148), 42 states have call successors, (148) [2024-11-27 20:07:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 358 transitions. [2024-11-27 20:07:56,132 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 358 transitions. Word has length 1537 [2024-11-27 20:07:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:07:56,132 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 358 transitions. [2024-11-27 20:07:56,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (18), 2 states have call predecessors, (18), 7 states have return successors, (25), 6 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-27 20:07:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 358 transitions. [2024-11-27 20:07:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1357 [2024-11-27 20:07:56,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:07:56,153 INFO L218 NwaCegarLoop]: trace histogram [104, 104, 95, 95, 79, 79, 52, 52, 52, 52, 52, 52, 52, 47, 47, 47, 47, 47, 47, 47, 32, 27, 25, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:07:56,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 20:07:56,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:07:56,357 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:07:56,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:07:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash -462362843, now seen corresponding path program 10 times [2024-11-27 20:07:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:07:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294296572] [2024-11-27 20:07:56,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:07:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:07:56,693 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:07:56,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55074 backedges. 791 proven. 3764 refuted. 0 times theorem prover too weak. 50519 trivial. 0 not checked. [2024-11-27 20:07:59,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:07:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294296572] [2024-11-27 20:07:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294296572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:07:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522712613] [2024-11-27 20:07:59,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:07:59,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:07:59,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:07:59,052 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:07:59,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:07:59,714 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:07:59,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:07:59,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 2410 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:07:59,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:07:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55074 backedges. 7938 proven. 68 refuted. 0 times theorem prover too weak. 47068 trivial. 0 not checked. [2024-11-27 20:07:59,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55074 backedges. 794 proven. 4134 refuted. 0 times theorem prover too weak. 50146 trivial. 0 not checked. [2024-11-27 20:08:06,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522712613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:06,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2024-11-27 20:08:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916619472] [2024-11-27 20:08:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:06,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:08:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:06,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:08:06,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:08:06,533 INFO L87 Difference]: Start difference. First operand 213 states and 358 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-27 20:08:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:07,098 INFO L93 Difference]: Finished difference Result 425 states and 825 transitions. [2024-11-27 20:08:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 20:08:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) Word has length 1356 [2024-11-27 20:08:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:07,104 INFO L225 Difference]: With dead ends: 425 [2024-11-27 20:08:07,104 INFO L226 Difference]: Without dead ends: 218 [2024-11-27 20:08:07,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2737 GetRequests, 2698 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 20:08:07,108 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:07,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 363 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:08:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-27 20:08:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-27 20:08:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 145 states have internal predecessors, (170), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (138), 46 states have call predecessors, (138), 42 states have call successors, (138) [2024-11-27 20:08:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 350 transitions. [2024-11-27 20:08:07,144 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 350 transitions. Word has length 1356 [2024-11-27 20:08:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:07,145 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 350 transitions. [2024-11-27 20:08:07,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (29), 8 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-27 20:08:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 350 transitions. [2024-11-27 20:08:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2150 [2024-11-27 20:08:07,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:07,189 INFO L218 NwaCegarLoop]: trace histogram [158, 158, 157, 157, 129, 126, 79, 79, 79, 79, 79, 79, 79, 78, 78, 78, 78, 78, 78, 78, 50, 48, 32, 28, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:07,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:08:07,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:08:07,390 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:07,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 585212745, now seen corresponding path program 11 times [2024-11-27 20:08:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:07,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730718059] [2024-11-27 20:08:07,392 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:08:07,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:07,540 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-11-27 20:08:07,541 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 139063 backedges. 1854 proven. 7447 refuted. 0 times theorem prover too weak. 129762 trivial. 0 not checked. [2024-11-27 20:08:08,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:08,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730718059] [2024-11-27 20:08:08,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730718059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:08,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597064165] [2024-11-27 20:08:08,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:08:08,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:08,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:08,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:08,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:08:08,769 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-11-27 20:08:08,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:08,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:08:08,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 139063 backedges. 42806 proven. 331 refuted. 0 times theorem prover too weak. 95926 trivial. 0 not checked. [2024-11-27 20:08:09,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 139063 backedges. 1898 proven. 7989 refuted. 0 times theorem prover too weak. 129176 trivial. 0 not checked. [2024-11-27 20:08:20,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597064165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:20,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:20,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 32 [2024-11-27 20:08:20,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377312205] [2024-11-27 20:08:20,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:20,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 20:08:20,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:20,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 20:08:20,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2024-11-27 20:08:20,661 INFO L87 Difference]: Start difference. First operand 218 states and 350 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (49), 16 states have call predecessors, (49), 27 states have call successors, (49) [2024-11-27 20:08:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:21,965 INFO L93 Difference]: Finished difference Result 507 states and 971 transitions. [2024-11-27 20:08:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 20:08:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (49), 16 states have call predecessors, (49), 27 states have call successors, (49) Word has length 2149 [2024-11-27 20:08:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:21,972 INFO L225 Difference]: With dead ends: 507 [2024-11-27 20:08:21,972 INFO L226 Difference]: Without dead ends: 264 [2024-11-27 20:08:21,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4338 GetRequests, 4275 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=460, Invalid=2510, Unknown=0, NotChecked=0, Total=2970 [2024-11-27 20:08:21,978 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 83 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:21,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 654 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 20:08:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-27 20:08:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 249. [2024-11-27 20:08:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 175 states have (on average 1.0457142857142858) internal successors, (183), 170 states have internal predecessors, (183), 48 states have call successors, (48), 35 states have call predecessors, (48), 25 states have return successors, (135), 43 states have call predecessors, (135), 48 states have call successors, (135) [2024-11-27 20:08:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 366 transitions. [2024-11-27 20:08:22,021 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 366 transitions. Word has length 2149 [2024-11-27 20:08:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:22,022 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 366 transitions. [2024-11-27 20:08:22,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 32 states have internal predecessors, (123), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (49), 16 states have call predecessors, (49), 27 states have call successors, (49) [2024-11-27 20:08:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 366 transitions. [2024-11-27 20:08:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-11-27 20:08:22,045 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:22,046 INFO L218 NwaCegarLoop]: trace histogram [111, 111, 108, 108, 90, 87, 55, 55, 55, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 36, 32, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:22,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:08:22,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:22,247 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:22,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1532334303, now seen corresponding path program 12 times [2024-11-27 20:08:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683038702] [2024-11-27 20:08:22,248 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:08:22,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:22,407 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-27 20:08:22,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 66942 backedges. 1243 proven. 4611 refuted. 0 times theorem prover too weak. 61088 trivial. 0 not checked. [2024-11-27 20:08:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683038702] [2024-11-27 20:08:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683038702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92067942] [2024-11-27 20:08:23,248 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:08:23,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:23,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:23,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:08:23,885 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-27 20:08:23,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:23,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-27 20:08:23,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 66942 backedges. 1243 proven. 4611 refuted. 0 times theorem prover too weak. 61088 trivial. 0 not checked. [2024-11-27 20:08:24,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 66942 backedges. 1247 proven. 4663 refuted. 0 times theorem prover too weak. 61032 trivial. 0 not checked. [2024-11-27 20:08:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92067942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:34,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-11-27 20:08:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990209754] [2024-11-27 20:08:34,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:34,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 20:08:34,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:34,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 20:08:34,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-11-27 20:08:34,428 INFO L87 Difference]: Start difference. First operand 249 states and 366 transitions. Second operand has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 26 states have internal predecessors, (89), 21 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 15 states have call predecessors, (35), 21 states have call successors, (35) [2024-11-27 20:08:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:34,827 INFO L93 Difference]: Finished difference Result 288 states and 499 transitions. [2024-11-27 20:08:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:08:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 26 states have internal predecessors, (89), 21 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 15 states have call predecessors, (35), 21 states have call successors, (35) Word has length 1495 [2024-11-27 20:08:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:34,840 INFO L225 Difference]: With dead ends: 288 [2024-11-27 20:08:34,840 INFO L226 Difference]: Without dead ends: 280 [2024-11-27 20:08:34,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3020 GetRequests, 2977 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 20:08:34,842 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:34,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 269 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-27 20:08:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 251. [2024-11-27 20:08:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 176 states have (on average 1.0454545454545454) internal successors, (184), 171 states have internal predecessors, (184), 49 states have call successors, (49), 35 states have call predecessors, (49), 25 states have return successors, (141), 44 states have call predecessors, (141), 49 states have call successors, (141) [2024-11-27 20:08:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 374 transitions. [2024-11-27 20:08:34,883 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 374 transitions. Word has length 1495 [2024-11-27 20:08:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:34,885 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 374 transitions. [2024-11-27 20:08:34,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 26 states have internal predecessors, (89), 21 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 15 states have call predecessors, (35), 21 states have call successors, (35) [2024-11-27 20:08:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 374 transitions. [2024-11-27 20:08:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5938 [2024-11-27 20:08:35,206 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:35,208 INFO L218 NwaCegarLoop]: trace histogram [437, 437, 434, 434, 354, 353, 218, 218, 218, 218, 218, 218, 218, 217, 217, 217, 217, 217, 217, 217, 136, 136, 84, 80, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:35,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:35,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:35,409 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:35,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2113902377, now seen corresponding path program 13 times [2024-11-27 20:08:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122875513] [2024-11-27 20:08:35,413 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:08:35,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1069873 backedges. 4805 proven. 25887 refuted. 0 times theorem prover too weak. 1039181 trivial. 0 not checked. [2024-11-27 20:09:12,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122875513] [2024-11-27 20:09:12,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122875513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680423596] [2024-11-27 20:09:12,296 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:09:12,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:12,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:09:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:14,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 13201 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 20:09:14,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1069873 backedges. 3048 proven. 26043 refuted. 0 times theorem prover too weak. 1040782 trivial. 0 not checked. [2024-11-27 20:09:15,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1069873 backedges. 3048 proven. 26128 refuted. 0 times theorem prover too weak. 1040697 trivial. 0 not checked. [2024-11-27 20:09:49,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680423596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:49,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 44 [2024-11-27 20:09:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117982794] [2024-11-27 20:09:49,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:49,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-27 20:09:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:49,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-27 20:09:49,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2024-11-27 20:09:49,849 INFO L87 Difference]: Start difference. First operand 251 states and 374 transitions. Second operand has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 37 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 23 states have call predecessors, (61), 37 states have call successors, (61) [2024-11-27 20:09:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:52,734 INFO L93 Difference]: Finished difference Result 685 states and 1457 transitions. [2024-11-27 20:09:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-27 20:09:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 37 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 23 states have call predecessors, (61), 37 states have call successors, (61) Word has length 5937 [2024-11-27 20:09:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:52,746 INFO L225 Difference]: With dead ends: 685 [2024-11-27 20:09:52,747 INFO L226 Difference]: Without dead ends: 402 [2024-11-27 20:09:52,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11947 GetRequests, 11839 SyntacticMatches, 12 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1498, Invalid=8008, Unknown=0, NotChecked=0, Total=9506 [2024-11-27 20:09:52,755 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 401 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:52,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 604 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 20:09:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2024-11-27 20:09:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 309. [2024-11-27 20:09:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 215 states have (on average 1.041860465116279) internal successors, (224), 210 states have internal predecessors, (224), 62 states have call successors, (62), 42 states have call predecessors, (62), 31 states have return successors, (289), 56 states have call predecessors, (289), 62 states have call successors, (289) [2024-11-27 20:09:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 575 transitions. [2024-11-27 20:09:52,817 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 575 transitions. Word has length 5937 [2024-11-27 20:09:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:52,819 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 575 transitions. [2024-11-27 20:09:52,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 44 states have internal predecessors, (139), 37 states have call successors, (44), 1 states have call predecessors, (44), 22 states have return successors, (61), 23 states have call predecessors, (61), 37 states have call successors, (61) [2024-11-27 20:09:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 575 transitions. [2024-11-27 20:09:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11657 [2024-11-27 20:09:53,710 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:53,712 INFO L218 NwaCegarLoop]: trace histogram [867, 867, 844, 844, 696, 690, 433, 433, 433, 433, 433, 433, 433, 422, 422, 422, 422, 422, 422, 422, 268, 263, 177, 148, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:53,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:09:53,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:53,913 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:53,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 544401307, now seen corresponding path program 14 times [2024-11-27 20:09:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732654767] [2024-11-27 20:09:53,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:04,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:04,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:12:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4133629 backedges. 8243 proven. 39444 refuted. 0 times theorem prover too weak. 4085942 trivial. 0 not checked. [2024-11-27 20:12:17,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:12:17,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732654767] [2024-11-27 20:12:17,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732654767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:12:17,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110281299] [2024-11-27 20:12:17,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:12:17,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:12:17,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:12:17,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:12:22,838 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:12:22,838 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:12:22,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 25899 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:12:23,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4133629 backedges. 4977 proven. 57482 refuted. 0 times theorem prover too weak. 4071170 trivial. 0 not checked. [2024-11-27 20:12:23,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:13:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4133629 backedges. 4977 proven. 57584 refuted. 0 times theorem prover too weak. 4071068 trivial. 0 not checked. [2024-11-27 20:13:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110281299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:13:34,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:13:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 29] total 41 [2024-11-27 20:13:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325704989] [2024-11-27 20:13:34,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:13:34,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-27 20:13:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:13:34,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-27 20:13:34,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1356, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 20:13:34,179 INFO L87 Difference]: Start difference. First operand 309 states and 575 transitions. Second operand has 41 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 41 states have internal predecessors, (132), 36 states have call successors, (41), 1 states have call predecessors, (41), 23 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) [2024-11-27 20:13:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:13:35,221 INFO L93 Difference]: Finished difference Result 402 states and 1004 transitions. [2024-11-27 20:13:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:13:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 41 states have internal predecessors, (132), 36 states have call successors, (41), 1 states have call predecessors, (41), 23 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) Word has length 11656 [2024-11-27 20:13:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:13:35,254 INFO L225 Difference]: With dead ends: 402 [2024-11-27 20:13:35,254 INFO L226 Difference]: Without dead ends: 394 [2024-11-27 20:13:35,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23353 GetRequests, 23281 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2024-11-27 20:13:35,261 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:13:35,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 317 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:13:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-27 20:13:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2024-11-27 20:13:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 246 states have internal predecessors, (260), 72 states have call successors, (72), 42 states have call predecessors, (72), 44 states have return successors, (493), 79 states have call predecessors, (493), 72 states have call successors, (493) [2024-11-27 20:13:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 825 transitions. [2024-11-27 20:13:35,342 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 825 transitions. Word has length 11656 [2024-11-27 20:13:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:13:35,347 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 825 transitions. [2024-11-27 20:13:35,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 41 states have internal predecessors, (132), 36 states have call successors, (41), 1 states have call predecessors, (41), 23 states have return successors, (61), 24 states have call predecessors, (61), 36 states have call successors, (61) [2024-11-27 20:13:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 825 transitions. [2024-11-27 20:13:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14854 [2024-11-27 20:13:36,798 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:13:36,800 INFO L218 NwaCegarLoop]: trace histogram [1119, 1119, 1062, 1062, 892, 871, 559, 559, 559, 559, 559, 559, 559, 531, 531, 531, 531, 531, 531, 531, 361, 312, 227, 191, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:13:36,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:13:37,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:13:37,001 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:13:37,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:13:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash -237532464, now seen corresponding path program 15 times [2024-11-27 20:13:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:13:37,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299655176] [2024-11-27 20:13:37,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:13:37,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:13:37,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-11-27 20:13:37,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:13:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6718623 backedges. 59905 proven. 1042 refuted. 0 times theorem prover too weak. 6657676 trivial. 0 not checked. [2024-11-27 20:13:38,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:13:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299655176] [2024-11-27 20:13:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299655176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:13:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355205793] [2024-11-27 20:13:38,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:13:38,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:13:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:13:38,801 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:13:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:13:41,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-11-27 20:13:41,115 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:13:41,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:13:41,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:13:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6718623 backedges. 332269 proven. 145 refuted. 0 times theorem prover too weak. 6386209 trivial. 0 not checked. [2024-11-27 20:13:42,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:14:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6718623 backedges. 64704 proven. 1169 refuted. 0 times theorem prover too weak. 6652750 trivial. 0 not checked. [2024-11-27 20:14:56,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355205793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:14:56,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:14:56,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 25 [2024-11-27 20:14:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108136029] [2024-11-27 20:14:56,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:14:56,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 20:14:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:14:56,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 20:14:56,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:14:56,687 INFO L87 Difference]: Start difference. First operand 368 states and 825 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 15 states have call successors, (32), 2 states have call predecessors, (32), 10 states have return successors, (39), 16 states have call predecessors, (39), 15 states have call successors, (39) [2024-11-27 20:14:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:14:57,284 INFO L93 Difference]: Finished difference Result 719 states and 1842 transitions. [2024-11-27 20:14:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 20:14:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 15 states have call successors, (32), 2 states have call predecessors, (32), 10 states have return successors, (39), 16 states have call predecessors, (39), 15 states have call successors, (39) Word has length 14853 [2024-11-27 20:14:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:14:57,295 INFO L225 Difference]: With dead ends: 719 [2024-11-27 20:14:57,295 INFO L226 Difference]: Without dead ends: 362 [2024-11-27 20:14:57,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29734 GetRequests, 29690 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 20:14:57,301 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:14:57,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 312 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:14:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-27 20:14:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 322. [2024-11-27 20:14:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 223 states have (on average 1.0403587443946187) internal successors, (232), 218 states have internal predecessors, (232), 64 states have call successors, (64), 42 states have call predecessors, (64), 34 states have return successors, (324), 61 states have call predecessors, (324), 64 states have call successors, (324) [2024-11-27 20:14:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 620 transitions. [2024-11-27 20:14:57,366 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 620 transitions. Word has length 14853 [2024-11-27 20:14:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:14:57,370 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 620 transitions. [2024-11-27 20:14:57,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 15 states have call successors, (32), 2 states have call predecessors, (32), 10 states have return successors, (39), 16 states have call predecessors, (39), 15 states have call successors, (39) [2024-11-27 20:14:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 620 transitions. [2024-11-27 20:14:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14583 [2024-11-27 20:14:58,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:14:58,760 INFO L218 NwaCegarLoop]: trace histogram [1088, 1088, 1053, 1053, 870, 862, 544, 544, 544, 544, 544, 544, 544, 526, 526, 526, 526, 526, 526, 526, 344, 318, 218, 191, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:14:58,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 20:14:58,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:14:58,961 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:14:58,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:14:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1327321160, now seen corresponding path program 16 times [2024-11-27 20:14:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:14:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965578434] [2024-11-27 20:14:58,965 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:14:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:15:12,622 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:15:12,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:19:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6473014 backedges. 12985 proven. 104685 refuted. 0 times theorem prover too weak. 6355344 trivial. 0 not checked. [2024-11-27 20:19:27,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:19:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965578434] [2024-11-27 20:19:27,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965578434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:19:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398529118] [2024-11-27 20:19:27,444 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:19:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:27,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:27,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e28dd344-abd0-474d-8d97-73c3cd1bff59/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:19:33,225 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:19:33,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:19:33,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 25949 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 20:19:33,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6473014 backedges. 1324698 proven. 8387 refuted. 0 times theorem prover too weak. 5139929 trivial. 0 not checked. [2024-11-27 20:19:34,314 INFO L312 TraceCheckSpWp]: Computing backward predicates...