./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.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_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/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_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/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_205f8546-ac5e-424e-8532-e1baade424a7/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 4b2397f02ca31d86bec1660af6a105f36402aae0113477a6332673f13a213eff --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:52:56,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:52:56,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:52:56,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:52:56,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:52:56,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:52:56,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:52:56,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:52:56,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:52:56,282 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:52:56,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:52:56,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:52:56,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:52:56,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:52:56,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:52:56,284 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:52:56,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:52:56,285 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:52:56,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:52:56,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:52:56,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:52:56,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:52:56,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:52:56,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:52:56,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:52:56,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:52:56,287 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_205f8546-ac5e-424e-8532-e1baade424a7/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 -> 4b2397f02ca31d86bec1660af6a105f36402aae0113477a6332673f13a213eff [2024-11-28 03:52:56,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:52:56,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:52:56,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:52:56,627 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:52:56,627 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:52:56,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.c [2024-11-28 03:52:59,565 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/data/7bea6f3b7/b2f10a650d06425fa6604975cf6987cc/FLAG021bc9ca0 [2024-11-28 03:52:59,850 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:52:59,855 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.c [2024-11-28 03:52:59,880 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/data/7bea6f3b7/b2f10a650d06425fa6604975cf6987cc/FLAG021bc9ca0 [2024-11-28 03:53:00,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/data/7bea6f3b7/b2f10a650d06425fa6604975cf6987cc [2024-11-28 03:53:00,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:53:00,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:53:00,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:53:00,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:53:00,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:53:00,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7046ec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00, skipping insertion in model container [2024-11-28 03:53:00,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,165 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:53:00,329 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_205f8546-ac5e-424e-8532-e1baade424a7/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2024-11-28 03:53:00,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:53:00,347 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:53:00,358 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_205f8546-ac5e-424e-8532-e1baade424a7/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1b.c[1277,1290] [2024-11-28 03:53:00,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:53:00,370 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:53:00,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00 WrapperNode [2024-11-28 03:53:00,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:53:00,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:53:00,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:53:00,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:53:00,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,395 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-11-28 03:53:00,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:53:00,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:53:00,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:53:00,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:53:00,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,403 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,414 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 2 writes are split as follows [0, 2]. [2024-11-28 03:53:00,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,417 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,420 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,421 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:53:00,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:53:00,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:53:00,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:53:00,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (1/1) ... [2024-11-28 03:53:00,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:53:00,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:00,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:53:00,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:53:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:53:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:53:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2024-11-28 03:53:00,498 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:53:00,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:53:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:53:00,580 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:53:00,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:53:00,681 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-11-28 03:53:00,681 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:53:00,694 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:53:00,694 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 03:53:00,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:53:00 BoogieIcfgContainer [2024-11-28 03:53:00,695 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:53:00,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:53:00,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:53:00,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:53:00,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:53:00" (1/3) ... [2024-11-28 03:53:00,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36126921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:53:00, skipping insertion in model container [2024-11-28 03:53:00,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:53:00" (2/3) ... [2024-11-28 03:53:00,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36126921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:53:00, skipping insertion in model container [2024-11-28 03:53:00,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:53:00" (3/3) ... [2024-11-28 03:53:00,710 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_1b.c [2024-11-28 03:53:00,726 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:53:00,727 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_1b.c that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 03:53:00,781 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:53:00,793 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;@7ca53882, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:53:00,794 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:53:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:53:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:53:00,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:00,805 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:00,805 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:00,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash -238646374, now seen corresponding path program 1 times [2024-11-28 03:53:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:00,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744790086] [2024-11-28 03:53:00,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:01,381 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 03:53:01,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:01,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744790086] [2024-11-28 03:53:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744790086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:53:01,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:53:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:53:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480805199] [2024-11-28 03:53:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:53:01,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:53:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:01,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:53:01,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:53:01,411 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:53:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:01,535 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-28 03:53:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:53:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-28 03:53:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:01,545 INFO L225 Difference]: With dead ends: 26 [2024-11-28 03:53:01,546 INFO L226 Difference]: Without dead ends: 14 [2024-11-28 03:53:01,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:53:01,556 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:01,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:53:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-28 03:53:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-28 03:53:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:53:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-28 03:53:01,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-11-28 03:53:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:01,603 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-28 03:53:01,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:53:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-28 03:53:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 03:53:01,605 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:01,605 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:01,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:53:01,606 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:01,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1470993118, now seen corresponding path program 1 times [2024-11-28 03:53:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:01,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531231714] [2024-11-28 03:53:01,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:53:02,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531231714] [2024-11-28 03:53:02,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531231714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:02,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214553316] [2024-11-28 03:53:02,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:02,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:02,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:02,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:02,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:53:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:02,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:53:02,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:02,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:53:02,350 WARN L873 $PredicateComparison]: unable to prove that (exists ((func_to_recursive_line_19_to_19_0_~a.offset Int)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_19_to_19_0_#in~a.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_19_to_19_0_#in~a.base|))) (store .cse0 func_to_recursive_line_19_to_19_0_~a.offset (+ (select .cse0 func_to_recursive_line_19_to_19_0_~a.offset) 1)))))) is different from true [2024-11-28 03:53:02,454 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-11-28 03:53:02,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2024-11-28 03:53:02,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 03:53:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-28 03:53:02,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:02,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214553316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:02,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2024-11-28 03:53:02,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719084153] [2024-11-28 03:53:02,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:02,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:53:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:02,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:53:02,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2024-11-28 03:53:02,786 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:53:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:03,106 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2024-11-28 03:53:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:53:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2024-11-28 03:53:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:03,108 INFO L225 Difference]: With dead ends: 20 [2024-11-28 03:53:03,109 INFO L226 Difference]: Without dead ends: 16 [2024-11-28 03:53:03,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=281, Unknown=1, NotChecked=34, Total=380 [2024-11-28 03:53:03,112 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:03,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2024-11-28 03:53:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-28 03:53:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-28 03:53:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:53:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-28 03:53:03,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2024-11-28 03:53:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:03,123 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-28 03:53:03,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:53:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-28 03:53:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 03:53:03,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:03,126 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:03,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:53:03,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:03,327 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:03,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 109140884, now seen corresponding path program 2 times [2024-11-28 03:53:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147502993] [2024-11-28 03:53:03,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:53:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:03,359 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:53:03,359 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147502993] [2024-11-28 03:53:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147502993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947512361] [2024-11-28 03:53:04,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:53:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:04,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:04,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:53:04,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:53:04,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:04,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:53:04,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:04,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:53:04,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 03:53:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:53:04,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:04,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:53:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947512361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:04,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-11-28 03:53:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446371007] [2024-11-28 03:53:04,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:04,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:53:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:04,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:53:04,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:53:04,988 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:53:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:05,083 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-11-28 03:53:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:53:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 20 [2024-11-28 03:53:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:05,084 INFO L225 Difference]: With dead ends: 26 [2024-11-28 03:53:05,084 INFO L226 Difference]: Without dead ends: 20 [2024-11-28 03:53:05,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:53:05,085 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:05,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:53:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-28 03:53:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-28 03:53:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:53:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-28 03:53:05,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 20 [2024-11-28 03:53:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:05,093 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-28 03:53:05,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:53:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-28 03:53:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:53:05,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:05,094 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:05,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:53:05,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:05,295 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:05,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:05,296 INFO L85 PathProgramCache]: Analyzing trace with hash 242710158, now seen corresponding path program 3 times [2024-11-28 03:53:05,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:05,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484412331] [2024-11-28 03:53:05,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:53:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:05,333 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 03:53:05,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:53:06,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484412331] [2024-11-28 03:53:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484412331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:06,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742494360] [2024-11-28 03:53:06,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:53:06,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:06,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:06,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:53:06,531 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 03:53:06,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:06,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 03:53:06,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:06,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:53:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:53:06,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:53:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742494360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:09,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:53:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 22] total 41 [2024-11-28 03:53:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989834189] [2024-11-28 03:53:09,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:09,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 03:53:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:09,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 03:53:09,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:53:09,484 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 12 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 03:53:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:10,332 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-11-28 03:53:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:53:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 12 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) Word has length 30 [2024-11-28 03:53:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:10,333 INFO L225 Difference]: With dead ends: 35 [2024-11-28 03:53:10,334 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 03:53:10,335 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:53:10,338 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:10,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 143 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:53:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 03:53:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 03:53:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-28 03:53:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-28 03:53:10,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 30 [2024-11-28 03:53:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:10,359 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-28 03:53:10,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 11 states have call successors, (11), 6 states have call predecessors, (11), 12 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 03:53:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-28 03:53:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 03:53:10,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:10,363 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:10,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:53:10,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:10,568 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:10,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash -484615032, now seen corresponding path program 4 times [2024-11-28 03:53:10,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:10,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752583178] [2024-11-28 03:53:10,569 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:53:10,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:10,613 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:53:10,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 03:53:10,616 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 03:53:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:53:10,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 03:53:10,667 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 03:53:10,668 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 03:53:10,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:53:10,674 INFO L422 BasicCegarLoop]: Path program histogram: [4, 1] [2024-11-28 03:53:10,715 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:53:10,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:53:10 BoogieIcfgContainer [2024-11-28 03:53:10,722 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:53:10,722 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:53:10,722 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:53:10,723 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:53:10,723 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:53:00" (3/4) ... [2024-11-28 03:53:10,724 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 03:53:10,777 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 23. [2024-11-28 03:53:10,856 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 03:53:10,860 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 03:53:10,860 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:53:10,861 INFO L158 Benchmark]: Toolchain (without parser) took 10718.16ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 95.0MB in the beginning and 272.3MB in the end (delta: -177.4MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2024-11-28 03:53:10,862 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:53:10,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.31ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 84.2MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:53:10,862 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.88ms. Allocated memory is still 117.4MB. Free memory was 84.2MB in the beginning and 83.2MB in the end (delta: 978.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:53:10,863 INFO L158 Benchmark]: Boogie Preprocessor took 26.96ms. Allocated memory is still 117.4MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:53:10,863 INFO L158 Benchmark]: RCFGBuilder took 271.41ms. Allocated memory is still 117.4MB. Free memory was 82.0MB in the beginning and 72.3MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:53:10,863 INFO L158 Benchmark]: TraceAbstraction took 10023.16ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 71.6MB in the beginning and 277.1MB in the end (delta: -205.6MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2024-11-28 03:53:10,864 INFO L158 Benchmark]: Witness Printer took 138.09ms. Allocated memory is still 352.3MB. Free memory was 277.1MB in the beginning and 272.3MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:53:10,868 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.31ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 84.2MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.88ms. Allocated memory is still 117.4MB. Free memory was 84.2MB in the beginning and 83.2MB in the end (delta: 978.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.96ms. Allocated memory is still 117.4MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 271.41ms. Allocated memory is still 117.4MB. Free memory was 82.0MB in the beginning and 72.3MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 10023.16ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 71.6MB in the beginning and 277.1MB in the end (delta: -205.6MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. * Witness Printer took 138.09ms. Allocated memory is still 352.3MB. Free memory was 277.1MB in the beginning and 272.3MB in the end (delta: 4.8MB). Peak memory consumption was 8.4MB. 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 - CounterExampleResult [Line: 48]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] int a = 6; [L41] int a = 6; [L43] a = 0 [L44] CALL func_to_recursive_line_19_to_19_0(&a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND TRUE (*a) < 6 [L30] EXPR \read(*a) [L30] ++(*a) [L30] ++(*a) [L32] CALL func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}] [L25] EXPR \read(*a) VAL [\old(a)={7:0}, a={7:0}] [L25] COND FALSE !((*a) < 6) [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L32] RET func_to_recursive_line_19_to_19_0(a) VAL [\old(a)={7:0}, a={7:0}] [L44] RET func_to_recursive_line_19_to_19_0(&a) VAL [a={7:0}] [L46] EXPR \read(a) [L46] COND TRUE a == 6 [L48] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.9s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 290 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 245 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 362 IncrementalHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 45 mSDtfsCounter, 362 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 162 ConstructedInterpolants, 3 QuantifiedInterpolants, 1562 SizeOfPredicates, 23 NumberOfNonLiveVariables, 310 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 50/172 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 03:53:10,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205f8546-ac5e-424e-8532-e1baade424a7/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE