./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.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_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/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_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/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_974cc763-954d-423f-a9ae-040b48f61ebe/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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:05:36,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:05:36,660 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:05:36,672 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:05:36,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:05:36,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:05:36,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:05:36,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:05:36,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:05:36,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:05:36,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:05:36,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:05:36,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:05:36,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:05:36,725 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:05:36,725 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:05:36,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:05:36,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:05:36,728 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:05:36,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:36,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:36,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:05:36,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:05:36,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:05:36,731 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:05:36,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:05:36,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:05:36,731 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_974cc763-954d-423f-a9ae-040b48f61ebe/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 -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2024-11-28 03:05:37,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:05:37,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:05:37,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:05:37,100 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:05:37,101 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:05:37,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive/Ackermann04.c [2024-11-28 03:05:40,101 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/data/ef61d826f/de1a1a8ca5994f41b1e1042c425d829e/FLAGf541c662f [2024-11-28 03:05:40,379 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:05:40,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/sv-benchmarks/c/recursive/Ackermann04.c [2024-11-28 03:05:40,391 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/data/ef61d826f/de1a1a8ca5994f41b1e1042c425d829e/FLAGf541c662f [2024-11-28 03:05:40,413 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/data/ef61d826f/de1a1a8ca5994f41b1e1042c425d829e [2024-11-28 03:05:40,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:05:40,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:05:40,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:05:40,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:05:40,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:05:40,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6492c695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40, skipping insertion in model container [2024-11-28 03:05:40,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,452 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:05:40,632 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_974cc763-954d-423f-a9ae-040b48f61ebe/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2024-11-28 03:05:40,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:05:40,647 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:05:40,667 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_974cc763-954d-423f-a9ae-040b48f61ebe/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2024-11-28 03:05:40,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:05:40,690 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:05:40,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40 WrapperNode [2024-11-28 03:05:40,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:05:40,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:05:40,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:05:40,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:05:40,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,725 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-11-28 03:05:40,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:05:40,726 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:05:40,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:05:40,726 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:05:40,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,738 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,754 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:05:40,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,758 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,766 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:05:40,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:05:40,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:05:40,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:05:40,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (1/1) ... [2024-11-28 03:05:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:40,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:05:40,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:05:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:05:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:05:40,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:05:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-11-28 03:05:40,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-11-28 03:05:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:05:40,894 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:05:40,897 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:05:41,041 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-28 03:05:41,041 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:05:41,054 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:05:41,057 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 03:05:41,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41 BoogieIcfgContainer [2024-11-28 03:05:41,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:05:41,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:05:41,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:05:41,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:05:41,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:40" (1/3) ... [2024-11-28 03:05:41,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545270a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:41, skipping insertion in model container [2024-11-28 03:05:41,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:40" (2/3) ... [2024-11-28 03:05:41,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545270a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:41, skipping insertion in model container [2024-11-28 03:05:41,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41" (3/3) ... [2024-11-28 03:05:41,071 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2024-11-28 03:05:41,088 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:05:41,091 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann04.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 03:05:41,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:05:41,174 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;@3d3e632a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:05:41,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:05:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:05:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:05:41,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:41,190 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:41,190 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:41,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2024-11-28 03:05:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:41,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289769274] [2024-11-28 03:05:41,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:41,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289769274] [2024-11-28 03:05:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289769274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:41,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:05:41,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:05:41,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595218626] [2024-11-28 03:05:41,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:41,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:05:41,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:41,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:05:41,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:05:41,566 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-28 03:05:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:41,759 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2024-11-28 03:05:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:05:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2024-11-28 03:05:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:41,774 INFO L225 Difference]: With dead ends: 37 [2024-11-28 03:05:41,774 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 03:05:41,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:05:41,783 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:41,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:05:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 03:05:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-28 03:05:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 03:05:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-28 03:05:41,824 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 12 [2024-11-28 03:05:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:41,824 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-28 03:05:41,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-28 03:05:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-28 03:05:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:05:41,826 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:41,826 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:41,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:05:41,827 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:41,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2024-11-28 03:05:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123579298] [2024-11-28 03:05:41,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:05:41,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:41,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123579298] [2024-11-28 03:05:41,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123579298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:41,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064637508] [2024-11-28 03:05:41,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:41,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:41,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:42,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:05:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:42,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:05:42,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:05:42,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:05:42,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064637508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:42,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:42,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-28 03:05:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365117516] [2024-11-28 03:05:42,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:42,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:05:42,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:42,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:05:42,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:05:42,271 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:05:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:42,466 INFO L93 Difference]: Finished difference Result 69 states and 124 transitions. [2024-11-28 03:05:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:05:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2024-11-28 03:05:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:42,471 INFO L225 Difference]: With dead ends: 69 [2024-11-28 03:05:42,471 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 03:05:42,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:05:42,476 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:42,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:05:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 03:05:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-28 03:05:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2024-11-28 03:05:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2024-11-28 03:05:42,495 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 19 [2024-11-28 03:05:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:42,496 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2024-11-28 03:05:42,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:05:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2024-11-28 03:05:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:05:42,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:42,499 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:42,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:42,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:42,704 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:42,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2024-11-28 03:05:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:42,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899985468] [2024-11-28 03:05:42,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 03:05:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899985468] [2024-11-28 03:05:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899985468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928055717] [2024-11-28 03:05:43,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:43,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:43,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:05:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:43,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:05:43,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 03:05:43,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:05:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928055717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:43,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:43,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2024-11-28 03:05:43,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858242469] [2024-11-28 03:05:43,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:43,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:05:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:43,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:05:43,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:05:43,982 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:05:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:44,127 INFO L93 Difference]: Finished difference Result 62 states and 124 transitions. [2024-11-28 03:05:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:05:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-28 03:05:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:44,132 INFO L225 Difference]: With dead ends: 62 [2024-11-28 03:05:44,132 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 03:05:44,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:05:44,133 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:44,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 68 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:05:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 03:05:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-11-28 03:05:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2024-11-28 03:05:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2024-11-28 03:05:44,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 45 [2024-11-28 03:05:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:44,166 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2024-11-28 03:05:44,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:05:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2024-11-28 03:05:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 03:05:44,173 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:44,173 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:44,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:44,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:44,374 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:44,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:44,374 INFO L85 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 2 times [2024-11-28 03:05:44,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:44,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31569513] [2024-11-28 03:05:44,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:44,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:44,457 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:44,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 104 proven. 14 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 03:05:44,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31569513] [2024-11-28 03:05:44,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31569513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:44,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131494115] [2024-11-28 03:05:44,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:05:44,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:44,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:44,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:05:44,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:05:44,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:44,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:05:44,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-28 03:05:45,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-11-28 03:05:47,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131494115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:47,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:47,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 27 [2024-11-28 03:05:47,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372104971] [2024-11-28 03:05:47,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:47,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:05:47,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:47,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:05:47,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:05:47,231 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) [2024-11-28 03:05:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:48,793 INFO L93 Difference]: Finished difference Result 294 states and 1388 transitions. [2024-11-28 03:05:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:05:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) Word has length 79 [2024-11-28 03:05:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:48,810 INFO L225 Difference]: With dead ends: 294 [2024-11-28 03:05:48,810 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 03:05:48,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 03:05:48,817 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:48,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 176 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:05:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 03:05:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 92. [2024-11-28 03:05:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 16 states have call successors, (16), 2 states have call predecessors, (16), 17 states have return successors, (194), 29 states have call predecessors, (194), 16 states have call successors, (194) [2024-11-28 03:05:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 272 transitions. [2024-11-28 03:05:48,926 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 272 transitions. Word has length 79 [2024-11-28 03:05:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:48,926 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 272 transitions. [2024-11-28 03:05:48,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 20 states have internal predecessors, (58), 7 states have call successors, (12), 2 states have call predecessors, (12), 11 states have return successors, (24), 14 states have call predecessors, (24), 7 states have call successors, (24) [2024-11-28 03:05:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 272 transitions. [2024-11-28 03:05:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-28 03:05:48,940 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:48,940 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:48,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:49,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:49,145 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:49,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash 211105466, now seen corresponding path program 3 times [2024-11-28 03:05:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888126142] [2024-11-28 03:05:49,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:05:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:49,185 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:05:49,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2024-11-28 03:05:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888126142] [2024-11-28 03:05:49,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888126142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:49,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:05:49,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:05:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048753497] [2024-11-28 03:05:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:49,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:05:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:49,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:05:49,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:05:49,287 INFO L87 Difference]: Start difference. First operand 92 states and 272 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 03:05:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:49,358 INFO L93 Difference]: Finished difference Result 149 states and 517 transitions. [2024-11-28 03:05:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:05:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 138 [2024-11-28 03:05:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:49,361 INFO L225 Difference]: With dead ends: 149 [2024-11-28 03:05:49,361 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 03:05:49,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:05:49,372 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:49,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 46 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:05:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 03:05:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-11-28 03:05:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 12 states have call successors, (12), 2 states have call predecessors, (12), 9 states have return successors, (64), 17 states have call predecessors, (64), 12 states have call successors, (64) [2024-11-28 03:05:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2024-11-28 03:05:49,397 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 138 [2024-11-28 03:05:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:49,398 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2024-11-28 03:05:49,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 03:05:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2024-11-28 03:05:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-11-28 03:05:49,407 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:49,407 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:49,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:05:49,407 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:49,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash 373404425, now seen corresponding path program 4 times [2024-11-28 03:05:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:49,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540671211] [2024-11-28 03:05:49,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:49,476 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:49,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 724 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2024-11-28 03:05:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540671211] [2024-11-28 03:05:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540671211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474827814] [2024-11-28 03:05:50,194 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:05:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:50,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:05:50,361 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:05:50,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:50,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:05:50,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 712 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2024-11-28 03:05:50,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 746 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2024-11-28 03:05:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474827814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:53,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:53,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 18 [2024-11-28 03:05:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883934103] [2024-11-28 03:05:53,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:53,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:05:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:53,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:05:53,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:05:53,622 INFO L87 Difference]: Start difference. First operand 60 states and 118 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) [2024-11-28 03:05:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:53,895 INFO L93 Difference]: Finished difference Result 147 states and 392 transitions. [2024-11-28 03:05:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:05:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) Word has length 210 [2024-11-28 03:05:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:53,900 INFO L225 Difference]: With dead ends: 147 [2024-11-28 03:05:53,900 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 03:05:53,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 415 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:05:53,904 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:53,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 155 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:05:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 03:05:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-28 03:05:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (68), 16 states have call predecessors, (68), 15 states have call successors, (68) [2024-11-28 03:05:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 143 transitions. [2024-11-28 03:05:53,938 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 143 transitions. Word has length 210 [2024-11-28 03:05:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:53,938 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 143 transitions. [2024-11-28 03:05:53,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 13 states have call successors, (23), 1 states have call predecessors, (23), 8 states have return successors, (28), 7 states have call predecessors, (28), 13 states have call successors, (28) [2024-11-28 03:05:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 143 transitions. [2024-11-28 03:05:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-28 03:05:53,944 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:53,945 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:53,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:05:54,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:54,146 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:54,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -270180431, now seen corresponding path program 5 times [2024-11-28 03:05:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:54,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982987753] [2024-11-28 03:05:54,147 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:54,168 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 03:05:54,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 112 proven. 247 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-28 03:05:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982987753] [2024-11-28 03:05:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982987753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631144783] [2024-11-28 03:05:54,673 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:05:54,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:54,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:05:54,797 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 03:05:54,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:54,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:05:54,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-11-28 03:05:54,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:05:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 126 proven. 215 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2024-11-28 03:05:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631144783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:05:56,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:05:56,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 28 [2024-11-28 03:05:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669116429] [2024-11-28 03:05:56,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:05:56,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:05:56,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:56,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:05:56,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:05:56,802 INFO L87 Difference]: Start difference. First operand 79 states and 143 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2024-11-28 03:05:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:05:58,254 INFO L93 Difference]: Finished difference Result 229 states and 473 transitions. [2024-11-28 03:05:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:05:58,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) Word has length 118 [2024-11-28 03:05:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:05:58,261 INFO L225 Difference]: With dead ends: 229 [2024-11-28 03:05:58,261 INFO L226 Difference]: Without dead ends: 148 [2024-11-28 03:05:58,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 222 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=852, Invalid=3308, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 03:05:58,265 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:05:58,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 249 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:05:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-28 03:05:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2024-11-28 03:05:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 69 states have internal predecessors, (74), 19 states have call successors, (19), 9 states have call predecessors, (19), 14 states have return successors, (60), 22 states have call predecessors, (60), 19 states have call successors, (60) [2024-11-28 03:05:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 153 transitions. [2024-11-28 03:05:58,288 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 153 transitions. Word has length 118 [2024-11-28 03:05:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:05:58,289 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 153 transitions. [2024-11-28 03:05:58,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 21 states have internal predecessors, (67), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (29), 15 states have call predecessors, (29), 11 states have call successors, (29) [2024-11-28 03:05:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 153 transitions. [2024-11-28 03:05:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 03:05:58,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:05:58,291 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:05:58,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:58,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:58,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:05:58,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1811622132, now seen corresponding path program 6 times [2024-11-28 03:05:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554746981] [2024-11-28 03:05:58,496 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:58,556 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:05:58,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 141 proven. 306 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-28 03:05:59,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554746981] [2024-11-28 03:05:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554746981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116604847] [2024-11-28 03:05:59,127 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:05:59,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:59,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:59,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:59,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:05:59,311 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:05:59,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:05:59,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:05:59,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-11-28 03:05:59,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-11-28 03:06:01,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116604847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:01,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:01,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 22 [2024-11-28 03:06:01,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499217237] [2024-11-28 03:06:01,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:01,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:06:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:01,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:06:01,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:06:01,354 INFO L87 Difference]: Start difference. First operand 101 states and 153 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-11-28 03:06:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:06:01,772 INFO L93 Difference]: Finished difference Result 193 states and 343 transitions. [2024-11-28 03:06:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 03:06:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 131 [2024-11-28 03:06:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:06:01,776 INFO L225 Difference]: With dead ends: 193 [2024-11-28 03:06:01,777 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 03:06:01,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 249 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:06:01,779 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:06:01,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 166 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:06:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 03:06:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-28 03:06:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2024-11-28 03:06:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 150 transitions. [2024-11-28 03:06:01,803 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 150 transitions. Word has length 131 [2024-11-28 03:06:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:06:01,803 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 150 transitions. [2024-11-28 03:06:01,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-11-28 03:06:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 150 transitions. [2024-11-28 03:06:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-28 03:06:01,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:06:01,805 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:01,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:02,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:02,010 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:06:02,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 7 times [2024-11-28 03:06:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:02,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896842485] [2024-11-28 03:06:02,011 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:06:02,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 439 proven. 281 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2024-11-28 03:06:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896842485] [2024-11-28 03:06:02,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896842485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553097635] [2024-11-28 03:06:02,797 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:06:02,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:02,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:02,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:02,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:06:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:03,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:06:03,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-11-28 03:06:03,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-11-28 03:06:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553097635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:08,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:08,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 27] total 35 [2024-11-28 03:06:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517616432] [2024-11-28 03:06:08,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:08,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 03:06:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:08,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 03:06:08,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 03:06:08,096 INFO L87 Difference]: Start difference. First operand 100 states and 150 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-28 03:06:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:06:09,124 INFO L93 Difference]: Finished difference Result 224 states and 396 transitions. [2024-11-28 03:06:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:06:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) Word has length 157 [2024-11-28 03:06:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:06:09,128 INFO L225 Difference]: With dead ends: 224 [2024-11-28 03:06:09,128 INFO L226 Difference]: Without dead ends: 133 [2024-11-28 03:06:09,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 297 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=817, Invalid=3605, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 03:06:09,131 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:06:09,132 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:06:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-28 03:06:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2024-11-28 03:06:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 77 states have internal predecessors, (82), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2024-11-28 03:06:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 183 transitions. [2024-11-28 03:06:09,153 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 183 transitions. Word has length 157 [2024-11-28 03:06:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:06:09,154 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 183 transitions. [2024-11-28 03:06:09,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 29 states have internal predecessors, (75), 14 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (32), 17 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-28 03:06:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 183 transitions. [2024-11-28 03:06:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-28 03:06:09,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:06:09,157 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:09,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:09,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:09,357 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:06:09,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 8 times [2024-11-28 03:06:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:09,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634423137] [2024-11-28 03:06:09,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:09,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:09,401 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 495 proven. 368 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2024-11-28 03:06:10,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:10,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634423137] [2024-11-28 03:06:10,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634423137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:10,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027015820] [2024-11-28 03:06:10,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:10,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:10,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:06:10,509 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:10,509 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:10,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:06:10,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2024-11-28 03:06:10,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2024-11-28 03:06:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027015820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:15,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:15,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 28] total 32 [2024-11-28 03:06:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409521719] [2024-11-28 03:06:15,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:15,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:06:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:15,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:06:15,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:06:15,728 INFO L87 Difference]: Start difference. First operand 115 states and 183 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2024-11-28 03:06:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:06:16,780 INFO L93 Difference]: Finished difference Result 263 states and 494 transitions. [2024-11-28 03:06:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 03:06:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) Word has length 170 [2024-11-28 03:06:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:06:16,784 INFO L225 Difference]: With dead ends: 263 [2024-11-28 03:06:16,784 INFO L226 Difference]: Without dead ends: 157 [2024-11-28 03:06:16,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 323 SyntacticMatches, 19 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=930, Invalid=3762, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 03:06:16,788 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:06:16,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 241 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:06:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-28 03:06:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2024-11-28 03:06:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 86 states have internal predecessors, (91), 24 states have call successors, (24), 9 states have call predecessors, (24), 20 states have return successors, (101), 34 states have call predecessors, (101), 24 states have call successors, (101) [2024-11-28 03:06:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 216 transitions. [2024-11-28 03:06:16,818 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 216 transitions. Word has length 170 [2024-11-28 03:06:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:06:16,818 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 216 transitions. [2024-11-28 03:06:16,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2024-11-28 03:06:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 216 transitions. [2024-11-28 03:06:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 03:06:16,821 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:06:16,821 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:16,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:06:17,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:17,025 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:06:17,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 9 times [2024-11-28 03:06:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785248330] [2024-11-28 03:06:17,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:17,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:17,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:06:17,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 688 proven. 74 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2024-11-28 03:06:17,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:17,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785248330] [2024-11-28 03:06:17,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785248330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:17,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587684734] [2024-11-28 03:06:17,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:17,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:17,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:17,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:17,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:06:18,071 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:06:18,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:18,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:06:18,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-11-28 03:06:18,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2024-11-28 03:06:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587684734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:26,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:26,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 33] total 38 [2024-11-28 03:06:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693000593] [2024-11-28 03:06:26,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:26,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 03:06:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:26,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 03:06:26,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:06:26,497 INFO L87 Difference]: Start difference. First operand 130 states and 216 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-28 03:06:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:06:27,928 INFO L93 Difference]: Finished difference Result 177 states and 296 transitions. [2024-11-28 03:06:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 03:06:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2024-11-28 03:06:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:06:27,929 INFO L225 Difference]: With dead ends: 177 [2024-11-28 03:06:27,929 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 03:06:27,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 343 SyntacticMatches, 20 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=954, Invalid=4448, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 03:06:27,933 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:06:27,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 263 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:06:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 03:06:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 03:06:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 03:06:27,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2024-11-28 03:06:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:06:27,935 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 03:06:27,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-28 03:06:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 03:06:27,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 03:06:27,938 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 03:06:27,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:06:28,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:06:28,145 INFO L422 BasicCegarLoop]: Path program histogram: [9, 1, 1] [2024-11-28 03:06:28,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 03:06:39,350 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:06:39,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:06:39 BoogieIcfgContainer [2024-11-28 03:06:39,354 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:06:39,355 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:06:39,355 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:06:39,355 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:06:39,356 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:41" (3/4) ... [2024-11-28 03:06:39,358 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 03:06:39,362 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2024-11-28 03:06:39,365 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-11-28 03:06:39,365 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-28 03:06:39,365 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 03:06:39,365 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 03:06:39,444 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 03:06:39,444 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 03:06:39,444 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:06:39,446 INFO L158 Benchmark]: Toolchain (without parser) took 59025.52ms. Allocated memory was 117.4MB in the beginning and 1.0GB in the end (delta: 906.0MB). Free memory was 85.0MB in the beginning and 763.9MB in the end (delta: -678.9MB). Peak memory consumption was 225.1MB. Max. memory is 16.1GB. [2024-11-28 03:06:39,446 INFO L158 Benchmark]: CDTParser took 1.40ms. Allocated memory is still 167.8MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:06:39,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.71ms. Allocated memory is still 117.4MB. Free memory was 85.0MB in the beginning and 74.2MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:06:39,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.15ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 73.2MB in the end (delta: 964.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:06:39,447 INFO L158 Benchmark]: Boogie Preprocessor took 43.12ms. Allocated memory is still 117.4MB. Free memory was 72.9MB in the beginning and 71.9MB in the end (delta: 950.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:06:39,447 INFO L158 Benchmark]: RCFGBuilder took 287.98ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 61.6MB in the end (delta: 10.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:06:39,448 INFO L158 Benchmark]: TraceAbstraction took 58294.45ms. Allocated memory was 117.4MB in the beginning and 1.0GB in the end (delta: 906.0MB). Free memory was 61.0MB in the beginning and 768.4MB in the end (delta: -707.4MB). Peak memory consumption was 592.8MB. Max. memory is 16.1GB. [2024-11-28 03:06:39,448 INFO L158 Benchmark]: Witness Printer took 89.52ms. Allocated memory is still 1.0GB. Free memory was 768.4MB in the beginning and 763.9MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:06:39,450 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40ms. Allocated memory is still 167.8MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.71ms. Allocated memory is still 117.4MB. Free memory was 85.0MB in the beginning and 74.2MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.15ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 73.2MB in the end (delta: 964.2kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.12ms. Allocated memory is still 117.4MB. Free memory was 72.9MB in the beginning and 71.9MB in the end (delta: 950.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.98ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 61.6MB in the end (delta: 10.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 58294.45ms. Allocated memory was 117.4MB in the beginning and 1.0GB in the end (delta: 906.0MB). Free memory was 61.0MB in the beginning and 768.4MB in the end (delta: -707.4MB). Peak memory consumption was 592.8MB. Max. memory is 16.1GB. * Witness Printer took 89.52ms. Allocated memory is still 1.0GB. Free memory was 768.4MB in the beginning and 763.9MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.0s, OverallIterations: 11, TraceHistogramMax: 31, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.1s, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 480 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 443 mSDsluCounter, 1737 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1448 mSDsCounter, 626 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3979 IncrementalHoareTripleChecker+Invalid, 4605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 626 mSolverCounterUnsat, 289 mSDtfsCounter, 3979 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2621 GetRequests, 2122 SyntacticMatches, 88 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6130 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=10, InterpolantAutomatonStates: 270, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 257 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 34.5s InterpolantComputationTime, 2374 NumberOfCodeBlocks, 1914 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 3457 ConstructedInterpolants, 0 QuantifiedInterpolants, 6683 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2855 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 20923/26757 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-28 03:06:39,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_974cc763-954d-423f-a9ae-040b48f61ebe/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE