/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i


--------------------------------------------------------------------------------


This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m
[2023-12-15 21:48:05,418 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-15 21:48:05,487 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2023-12-15 21:48:05,490 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-15 21:48:05,490 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-15 21:48:05,504 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-15 21:48:05,504 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-15 21:48:05,504 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-15 21:48:05,505 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-12-15 21:48:05,507 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-12-15 21:48:05,508 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-15 21:48:05,508 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-15 21:48:05,508 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-12-15 21:48:05,509 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-12-15 21:48:05,509 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-12-15 21:48:05,509 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-15 21:48:05,510 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-15 21:48:05,510 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-15 21:48:05,510 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-15 21:48:05,510 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-15 21:48:05,511 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-15 21:48:05,511 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-15 21:48:05,511 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-15 21:48:05,511 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-15 21:48:05,511 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2023-12-15 21:48:05,512 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-15 21:48:05,512 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-15 21:48:05,512 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-15 21:48:05,512 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-15 21:48:05,512 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-12-15 21:48:05,513 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-15 21:48:05,513 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-15 21:48:05,513 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-12-15 21:48:05,513 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-15 21:48:05,514 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true
[2023-12-15 21:48:05,687 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-15 21:48:05,706 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-15 21:48:05,708 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-15 21:48:05,709 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-15 21:48:05,709 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-15 21:48:05,711 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2023-12-15 21:48:06,772 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-15 21:48:06,967 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-15 21:48:06,968 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2023-12-15 21:48:06,976 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525e0ebb3/36c210a9d03a40f4b728fb0a4a0dd7ca/FLAGbf702522c
[2023-12-15 21:48:06,986 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/525e0ebb3/36c210a9d03a40f4b728fb0a4a0dd7ca
[2023-12-15 21:48:06,987 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-15 21:48:06,988 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2023-12-15 21:48:06,989 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-15 21:48:06,989 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-15 21:48:06,998 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-15 21:48:06,999 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:48:06" (1/1) ...
[2023-12-15 21:48:07,000 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf27edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:06, skipping insertion in model container
[2023-12-15 21:48:07,000 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:48:06" (1/1) ...
[2023-12-15 21:48:07,032 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-15 21:48:07,213 WARN  L239   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649]
[2023-12-15 21:48:07,230 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-15 21:48:07,242 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-15 21:48:07,265 WARN  L239   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649]
[2023-12-15 21:48:07,278 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-15 21:48:07,299 INFO  L206         MainTranslator]: Completed translation
[2023-12-15 21:48:07,300 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07 WrapperNode
[2023-12-15 21:48:07,303 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-15 21:48:07,304 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-15 21:48:07,304 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-15 21:48:07,304 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-15 21:48:07,309 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,318 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,339 INFO  L138                Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 207
[2023-12-15 21:48:07,340 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-15 21:48:07,340 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-15 21:48:07,340 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-15 21:48:07,340 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-15 21:48:07,348 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,348 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,351 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,397 INFO  L175           MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 18, 8, 6, 8]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0]. The 10 writes are split as follows [0, 7, 1, 1, 1].
[2023-12-15 21:48:07,397 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,398 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,404 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,408 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,410 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,411 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,422 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-15 21:48:07,423 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-15 21:48:07,423 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-15 21:48:07,423 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-15 21:48:07,423 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (1/1) ...
[2023-12-15 21:48:07,440 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-12-15 21:48:07,447 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-12-15 21:48:07,457 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-12-15 21:48:07,482 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-12-15 21:48:07,496 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2023-12-15 21:48:07,496 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2023-12-15 21:48:07,496 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2023-12-15 21:48:07,497 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-15 21:48:07,497 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-12-15 21:48:07,497 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$#0
[2023-12-15 21:48:07,497 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$#1
[2023-12-15 21:48:07,498 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$#2
[2023-12-15 21:48:07,498 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$#3
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$#4
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$#0
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$#1
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$#2
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$#3
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$#4
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_prev
[2023-12-15 21:48:07,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_prev
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0
[2023-12-15 21:48:07,499 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1
[2023-12-15 21:48:07,500 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2
[2023-12-15 21:48:07,500 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3
[2023-12-15 21:48:07,500 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4
[2023-12-15 21:48:07,500 INFO  L130     BoogieDeclarations]: Found specification of procedure chain_node
[2023-12-15 21:48:07,500 INFO  L138     BoogieDeclarations]: Found implementation of procedure chain_node
[2023-12-15 21:48:07,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-12-15 21:48:07,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#1
[2023-12-15 21:48:07,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#2
[2023-12-15 21:48:07,502 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#3
[2023-12-15 21:48:07,502 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#4
[2023-12-15 21:48:07,502 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_next
[2023-12-15 21:48:07,502 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_next
[2023-12-15 21:48:07,502 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-15 21:48:07,502 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-15 21:48:07,605 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-15 21:48:07,606 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-15 21:48:07,858 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-15 21:48:07,888 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-15 21:48:07,889 INFO  L309             CfgBuilder]: Removed 33 assume(true) statements.
[2023-12-15 21:48:07,889 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:48:07 BoogieIcfgContainer
[2023-12-15 21:48:07,889 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-15 21:48:07,890 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-15 21:48:07,891 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-15 21:48:07,893 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-15 21:48:07,893 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:48:06" (1/3) ...
[2023-12-15 21:48:07,893 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706da754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:48:07, skipping insertion in model container
[2023-12-15 21:48:07,893 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:48:07" (2/3) ...
[2023-12-15 21:48:07,894 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706da754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:48:07, skipping insertion in model container
[2023-12-15 21:48:07,894 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:48:07" (3/3) ...
[2023-12-15 21:48:07,894 INFO  L112   eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i
[2023-12-15 21:48:07,909 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-15 21:48:07,909 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-12-15 21:48:07,973 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-15 21:48:07,977 INFO  L357      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, mHoare=true, 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;@3b80dd37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-15 21:48:07,977 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-12-15 21:48:07,980 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 90 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 77 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17)
[2023-12-15 21:48:07,985 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2023-12-15 21:48:07,985 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-15 21:48:07,986 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-15 21:48:07,986 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-15 21:48:07,990 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-15 21:48:07,990 INFO  L85        PathProgramCache]: Analyzing trace with hash -1056251351, now seen corresponding path program 1 times
[2023-12-15 21:48:07,996 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-12-15 21:48:07,996 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409158251]
[2023-12-15 21:48:07,996 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:07,997 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-15 21:48:08,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:08,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-15 21:48:08,139 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-12-15 21:48:08,139 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409158251]
[2023-12-15 21:48:08,140 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409158251] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-15 21:48:08,140 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-15 21:48:08,140 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-12-15 21:48:08,141 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696670216]
[2023-12-15 21:48:08,141 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-15 21:48:08,144 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-12-15 21:48:08,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-12-15 21:48:08,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-12-15 21:48:08,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-12-15 21:48:08,165 INFO  L87              Difference]: Start difference. First operand  has 90 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 77 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-15 21:48:08,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-15 21:48:08,218 INFO  L93              Difference]: Finished difference Result 177 states and 315 transitions.
[2023-12-15 21:48:08,219 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2023-12-15 21:48:08,220 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14
[2023-12-15 21:48:08,220 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-15 21:48:08,227 INFO  L225             Difference]: With dead ends: 177
[2023-12-15 21:48:08,227 INFO  L226             Difference]: Without dead ends: 84
[2023-12-15 21:48:08,230 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2023-12-15 21:48:08,232 INFO  L413           NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-12-15 21:48:08,232 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-12-15 21:48:08,243 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2023-12-15 21:48:08,260 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84.
[2023-12-15 21:48:08,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-12-15 21:48:08,264 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions.
[2023-12-15 21:48:08,265 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 14
[2023-12-15 21:48:08,265 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-15 21:48:08,265 INFO  L495      AbstractCegarLoop]: Abstraction has 84 states and 104 transitions.
[2023-12-15 21:48:08,265 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-12-15 21:48:08,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions.
[2023-12-15 21:48:08,266 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-12-15 21:48:08,266 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-15 21:48:08,267 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-15 21:48:08,267 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-15 21:48:08,267 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-15 21:48:08,267 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-15 21:48:08,267 INFO  L85        PathProgramCache]: Analyzing trace with hash -1761441640, now seen corresponding path program 1 times
[2023-12-15 21:48:08,268 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-12-15 21:48:08,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248063445]
[2023-12-15 21:48:08,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:08,268 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-15 21:48:08,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:08,843 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-12-15 21:48:08,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:08,952 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2023-12-15 21:48:08,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:08,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-12-15 21:48:08,980 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-12-15 21:48:08,981 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248063445]
[2023-12-15 21:48:08,981 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248063445] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-15 21:48:08,981 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763289429]
[2023-12-15 21:48:08,981 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:08,981 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-15 21:48:08,982 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-12-15 21:48:08,984 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-15 21:48:09,017 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-12-15 21:48:09,164 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:09,167 INFO  L262         TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 41 conjunts are in the unsatisfiable core
[2023-12-15 21:48:09,178 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-15 21:48:09,276 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-12-15 21:48:09,378 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11
[2023-12-15 21:48:09,382 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 20 treesize of output 12
[2023-12-15 21:48:09,481 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 16 treesize of output 8
[2023-12-15 21:48:09,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-15 21:48:09,487 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-12-15 21:48:09,523 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 34 treesize of output 30
[2023-12-15 21:48:09,611 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 30 treesize of output 26
[2023-12-15 21:48:09,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-12-15 21:48:09,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [763289429] provided 0 perfect and 2 imperfect interpolant sequences
[2023-12-15 21:48:09,623 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-12-15 21:48:09,624 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15
[2023-12-15 21:48:09,624 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349117801]
[2023-12-15 21:48:09,625 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-12-15 21:48:09,625 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-12-15 21:48:09,625 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-12-15 21:48:09,626 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-12-15 21:48:09,627 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210
[2023-12-15 21:48:09,627 INFO  L87              Difference]: Start difference. First operand 84 states and 104 transitions. Second operand  has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-12-15 21:48:13,646 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:17,685 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:21,702 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:25,724 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:29,755 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:33,814 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:34,279 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-15 21:48:34,283 INFO  L93              Difference]: Finished difference Result 109 states and 131 transitions.
[2023-12-15 21:48:34,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2023-12-15 21:48:34,288 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27
[2023-12-15 21:48:34,288 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-15 21:48:34,292 INFO  L225             Difference]: With dead ends: 109
[2023-12-15 21:48:34,292 INFO  L226             Difference]: Without dead ends: 106
[2023-12-15 21:48:34,293 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600
[2023-12-15 21:48:34,296 INFO  L413           NwaCegarLoop]: 46 mSDtfsCounter, 225 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 54 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time
[2023-12-15 21:48:34,297 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 348 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 549 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time]
[2023-12-15 21:48:34,299 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2023-12-15 21:48:34,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100.
[2023-12-15 21:48:34,322 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 100 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 86 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-12-15 21:48:34,327 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions.
[2023-12-15 21:48:34,328 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 27
[2023-12-15 21:48:34,329 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-15 21:48:34,329 INFO  L495      AbstractCegarLoop]: Abstraction has 100 states and 121 transitions.
[2023-12-15 21:48:34,329 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-12-15 21:48:34,329 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions.
[2023-12-15 21:48:34,330 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2023-12-15 21:48:34,330 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-15 21:48:34,330 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-15 21:48:34,355 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-12-15 21:48:34,532 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-15 21:48:34,533 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-15 21:48:34,533 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-15 21:48:34,533 INFO  L85        PathProgramCache]: Analyzing trace with hash -535177918, now seen corresponding path program 1 times
[2023-12-15 21:48:34,533 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-12-15 21:48:34,533 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134890377]
[2023-12-15 21:48:34,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:34,533 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-15 21:48:34,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:34,839 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2023-12-15 21:48:34,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:34,904 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2023-12-15 21:48:34,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:34,921 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-12-15 21:48:34,921 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-12-15 21:48:34,921 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134890377]
[2023-12-15 21:48:34,921 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134890377] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-15 21:48:34,921 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839875471]
[2023-12-15 21:48:34,921 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:34,922 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-15 21:48:34,922 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-12-15 21:48:34,924 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-15 21:48:34,925 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-12-15 21:48:35,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-15 21:48:35,066 INFO  L262         TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core
[2023-12-15 21:48:35,071 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-15 21:48:35,110 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-12-15 21:48:35,165 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11
[2023-12-15 21:48:35,169 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 20 treesize of output 12
[2023-12-15 21:48:35,244 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 16 treesize of output 8
[2023-12-15 21:48:35,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-12-15 21:48:35,251 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-12-15 21:48:35,271 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 34 treesize of output 30
[2023-12-15 21:48:35,330 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 30 treesize of output 26
[2023-12-15 21:48:35,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-12-15 21:48:35,341 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [839875471] provided 0 perfect and 2 imperfect interpolant sequences
[2023-12-15 21:48:35,342 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-12-15 21:48:35,342 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15
[2023-12-15 21:48:35,342 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823842222]
[2023-12-15 21:48:35,342 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-12-15 21:48:35,342 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-12-15 21:48:35,342 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-12-15 21:48:35,343 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-12-15 21:48:35,343 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210
[2023-12-15 21:48:35,343 INFO  L87              Difference]: Start difference. First operand 100 states and 121 transitions. Second operand  has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-12-15 21:48:39,358 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:43,368 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:47,385 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:51,449 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:55,505 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-12-15 21:48:55,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-15 21:48:55,898 INFO  L93              Difference]: Finished difference Result 112 states and 132 transitions.
[2023-12-15 21:48:55,898 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2023-12-15 21:48:55,898 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29
[2023-12-15 21:48:55,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-15 21:48:55,899 INFO  L225             Difference]: With dead ends: 112
[2023-12-15 21:48:55,899 INFO  L226             Difference]: Without dead ends: 109
[2023-12-15 21:48:55,900 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600
[2023-12-15 21:48:55,900 INFO  L413           NwaCegarLoop]: 46 mSDtfsCounter, 221 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 52 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time
[2023-12-15 21:48:55,901 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 408 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 671 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time]
[2023-12-15 21:48:55,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2023-12-15 21:48:55,909 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104.
[2023-12-15 21:48:55,910 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 104 states, 80 states have (on average 1.225) internal successors, (98), 89 states have internal predecessors, (98), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-12-15 21:48:55,910 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions.
[2023-12-15 21:48:55,910 INFO  L78                 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 29
[2023-12-15 21:48:55,910 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-15 21:48:55,910 INFO  L495      AbstractCegarLoop]: Abstraction has 104 states and 123 transitions.
[2023-12-15 21:48:55,911 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-12-15 21:48:55,911 INFO  L276                IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions.
[2023-12-15 21:48:55,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2023-12-15 21:48:55,911 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-15 21:48:55,911 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-15 21:48:55,919 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-12-15 21:48:56,116 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2023-12-15 21:48:56,117 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-15 21:48:56,117 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-15 21:48:56,117 INFO  L85        PathProgramCache]: Analyzing trace with hash 1995234094, now seen corresponding path program 1 times
[2023-12-15 21:48:56,118 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-12-15 21:48:56,118 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525293578]
[2023-12-15 21:48:56,118 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-15 21:48:56,118 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-15 21:48:56,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-12-15 21:48:56,158 INFO  L356             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-12-15 21:48:56,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-12-15 21:48:56,200 INFO  L130   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2023-12-15 21:48:56,200 INFO  L360         BasicCegarLoop]: Counterexample is feasible
[2023-12-15 21:48:56,201 INFO  L805   garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2023-12-15 21:48:56,202 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-15 21:48:56,204 INFO  L445         BasicCegarLoop]: Path program histogram: [1, 1, 1, 1]
[2023-12-15 21:48:56,206 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2023-12-15 21:48:56,236 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:48:56 BoogieIcfgContainer
[2023-12-15 21:48:56,237 INFO  L131        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2023-12-15 21:48:56,237 INFO  L158              Benchmark]: Toolchain (without parser) took 49248.71ms. Allocated memory was 373.3MB in the beginning and 512.8MB in the end (delta: 139.5MB). Free memory was 321.2MB in the beginning and 253.5MB in the end (delta: 67.7MB). Peak memory consumption was 207.7MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,237 INFO  L158              Benchmark]: CDTParser took 1.57ms. Allocated memory is still 216.0MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB.
[2023-12-15 21:48:56,237 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 314.43ms. Allocated memory is still 373.3MB. Free memory was 321.2MB in the beginning and 302.3MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,237 INFO  L158              Benchmark]: Boogie Procedure Inliner took 35.69ms. Allocated memory is still 373.3MB. Free memory was 302.3MB in the beginning and 299.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,237 INFO  L158              Benchmark]: Boogie Preprocessor took 82.10ms. Allocated memory is still 373.3MB. Free memory was 299.7MB in the beginning and 295.0MB in the end (delta: 4.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,238 INFO  L158              Benchmark]: RCFGBuilder took 466.52ms. Allocated memory is still 373.3MB. Free memory was 295.0MB in the beginning and 267.8MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,238 INFO  L158              Benchmark]: TraceAbstraction took 48346.12ms. Allocated memory was 373.3MB in the beginning and 512.8MB in the end (delta: 139.5MB). Free memory was 267.2MB in the beginning and 253.5MB in the end (delta: 13.7MB). Peak memory consumption was 154.2MB. Max. memory is 8.0GB.
[2023-12-15 21:48:56,240 INFO  L338   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 1.57ms. Allocated memory is still 216.0MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB.
 * CACSL2BoogieTranslator took 314.43ms. Allocated memory is still 373.3MB. Free memory was 321.2MB in the beginning and 302.3MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB.
 * Boogie Procedure Inliner took 35.69ms. Allocated memory is still 373.3MB. Free memory was 302.3MB in the beginning and 299.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
 * Boogie Preprocessor took 82.10ms. Allocated memory is still 373.3MB. Free memory was 299.7MB in the beginning and 295.0MB in the end (delta: 4.7MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB.
 * RCFGBuilder took 466.52ms. Allocated memory is still 373.3MB. Free memory was 295.0MB in the beginning and 267.8MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB.
 * TraceAbstraction took 48346.12ms. Allocated memory was 373.3MB in the beginning and 512.8MB in the end (delta: 139.5MB). Free memory was 267.2MB in the beginning and 253.5MB in the end (delta: 13.7MB). Peak memory consumption was 154.2MB. Max. memory is 8.0GB.
 * 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: 565]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L639]              const struct node *p1, *p2;
[L640]  CALL, EXPR  create_sll(&p1, &p2)
[L588]              struct node *list = ((void *)0);
[L588]              struct node *list = ((void *)0);
[L590]  CALL        chain_node(&list)
[L582]  CALL, EXPR  alloc_node()
[L573]              struct node *ptr = malloc(sizeof *ptr);
[L574]  COND FALSE  !(!ptr)
        VAL         [ptr={-1:0}]
[L576]              ptr->next = ((void *)0)
[L577]              ptr->prev = ((void *)0)
[L578]              return ptr;
[L582]  RET, EXPR   alloc_node()
[L582]              struct node *node = alloc_node();
[L583]  EXPR        \read(**ppnode)
[L583]              node->next = *ppnode
[L584]              *ppnode = node
[L590]  RET         chain_node(&list)
        VAL         [list={6:0}, pp1={3:0}, pp1={3:0}, pp2={5:0}, pp2={5:0}]
[L591]  COND FALSE  !(__VERIFIER_nondet_int())
[L592]  EXPR        \read(*list)
[L592]              *pp2 = list
[L593]  COND FALSE  !(__VERIFIER_nondet_int())
[L595]  EXPR        \read(*list)
[L595]              *pp1 = list
[L597]  CALL        chain_node(&list)
[L582]  CALL, EXPR  alloc_node()
[L573]              struct node *ptr = malloc(sizeof *ptr);
[L574]  COND FALSE  !(!ptr)
        VAL         [ptr={-2:0}]
[L576]              ptr->next = ((void *)0)
[L577]              ptr->prev = ((void *)0)
[L578]              return ptr;
[L582]  RET, EXPR   alloc_node()
[L582]              struct node *node = alloc_node();
[L583]  EXPR        \read(**ppnode)
[L583]              node->next = *ppnode
[L584]              *ppnode = node
[L597]  RET         chain_node(&list)
        VAL         [list={6:0}, pp1={3:0}, pp1={3:0}, pp2={5:0}, pp2={5:0}]
[L598]  COND FALSE  !(__VERIFIER_nondet_int())
[L599]  EXPR        \read(*list)
[L599]              return list;
[L588]              struct node *list = ((void *)0);
[L599]              return list;
[L640]  RET, EXPR   create_sll(&p1, &p2)
[L640]              struct node *list = create_sll(&p1, &p2);
[L642]  EXPR        \read(*p1)
[L642]  EXPR        \read(*p2)
[L642]  CALL        check_seq_next(p1, p2)
        VAL         [beg={-1:0}, end={-1:0}]
[L626]  COND FALSE  !(!(beg))
        VAL         [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}]
[L627]  COND FALSE  !(!(end))
        VAL         [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}]
[L628]  EXPR        beg->next
[L628]              beg = beg->next
[L628]  COND TRUE   end != beg
        VAL         [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}]
[L629]  COND TRUE   !(beg)
        VAL         [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}]
[L629]  CALL        fail()
[L565]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.3s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 45.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 454 SdHoareTripleChecker+Valid, 44.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 446 mSDsluCounter, 861 SdHoareTripleChecker+Invalid, 44.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 664 mSDsCounter, 106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1224 IncrementalHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 106 mSolverCounterUnsat, 197 mSDtfsCounter, 1224 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=3, InterpolantAutomatonStates: 38, 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, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 8 QuantifiedInterpolants, 1424 SizeOfPredicates, 34 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 6/24 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
RESULT: Ultimate proved your program to be incorrect!
[2023-12-15 21:48:56,262 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...