./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-circular-2.i --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version b2eff8ba
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-circular-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --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 f91abcd8d9f4c4a9bb166bca3090e9f421fd2afed3c0226bce3d2e7c0b6ce95e
......................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-b2eff8b
[2021-10-28 23:34:38,507 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-10-28 23:34:38,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-28 23:34:38,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-28 23:34:38,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-28 23:34:38,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-28 23:34:38,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-28 23:34:38,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-28 23:34:38,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-28 23:34:38,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-28 23:34:38,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-10-28 23:34:38,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-28 23:34:38,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-28 23:34:38,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-28 23:34:38,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-28 23:34:38,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-28 23:34:38,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-28 23:34:38,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-28 23:34:38,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-28 23:34:38,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-28 23:34:38,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-28 23:34:38,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-28 23:34:38,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-10-28 23:34:38,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-28 23:34:38,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-28 23:34:38,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-28 23:34:38,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-28 23:34:38,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-28 23:34:38,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-28 23:34:38,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-28 23:34:38,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-28 23:34:38,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-28 23:34:38,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-28 23:34:38,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-28 23:34:38,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-28 23:34:38,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-28 23:34:38,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-28 23:34:38,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-28 23:34:38,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-28 23:34:38,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-28 23:34:38,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-10-28 23:34:38,682 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-10-28 23:34:38,714 INFO L113 SettingsManager]: Loading preferences was successful
[2021-10-28 23:34:38,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-28 23:34:38,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-10-28 23:34:38,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-10-28 23:34:38,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-10-28 23:34:38,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-10-28 23:34:38,717 INFO L138 SettingsManager]: * Use SBE=true
[2021-10-28 23:34:38,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-28 23:34:38,718 INFO L138 SettingsManager]: * sizeof long=4
[2021-10-28 23:34:38,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-10-28 23:34:38,718 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-10-28 23:34:38,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-10-28 23:34:38,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-10-28 23:34:38,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-28 23:34:38,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-10-28 23:34:38,720 INFO L138 SettingsManager]: * sizeof long double=12
[2021-10-28 23:34:38,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-10-28 23:34:38,720 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-10-28 23:34:38,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-10-28 23:34:38,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-28 23:34:38,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-10-28 23:34:38,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-10-28 23:34:38,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-28 23:34:38,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-28 23:34:38,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-10-28 23:34:38,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-28 23:34:38,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-10-28 23:34:38,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-28 23:34:38,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF
[2021-10-28 23:34:38,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2021-10-28 23:34:38,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-28 23:34:38,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-10-28 23:34:38,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91abcd8d9f4c4a9bb166bca3090e9f421fd2afed3c0226bce3d2e7c0b6ce95e
[2021-10-28 23:34:39,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-28 23:34:39,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-28 23:34:39,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-28 23:34:39,066 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-10-28 23:34:39,068 INFO L275 PluginConnector]: CDTParser initialized
[2021-10-28 23:34:39,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/forester-heap/sll-circular-2.i
[2021-10-28 23:34:39,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/data/795527bba/e1e5c161c74d4ba7b54db87c7c089dca/FLAGd24e7a3ce
[2021-10-28 23:34:39,925 INFO L306 CDTParser]: Found 1 translation units.
[2021-10-28 23:34:39,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i
[2021-10-28 23:34:39,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/data/795527bba/e1e5c161c74d4ba7b54db87c7c089dca/FLAGd24e7a3ce
[2021-10-28 23:34:39,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/data/795527bba/e1e5c161c74d4ba7b54db87c7c089dca
[2021-10-28 23:34:39,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-28 23:34:39,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-28 23:34:39,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-28 23:34:39,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-28 23:34:39,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-28 23:34:39,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:34:39" (1/1) ...
[2021-10-28 23:34:39,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c6834e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:39, skipping insertion in model container
[2021-10-28 23:34:39,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:34:39" (1/1) ...
[2021-10-28 23:34:39,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-10-28 23:34:40,041 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-10-28 23:34:40,550 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337]
[2021-10-28 23:34:40,557 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443]
[2021-10-28 23:34:40,564 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567]
[2021-10-28 23:34:40,575 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-10-28 23:34:40,587 INFO L203 MainTranslator]: Completed pre-run
[2021-10-28 23:34:40,663 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337]
[2021-10-28 23:34:40,665 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443]
[2021-10-28 23:34:40,667 WARN L228 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_d4837123-cb97-40bb-a677-e3a8729b9afa/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567]
[2021-10-28 23:34:40,670 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-10-28 23:34:40,717 INFO L208 MainTranslator]: Completed translation
[2021-10-28 23:34:40,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40 WrapperNode
[2021-10-28 23:34:40,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-28 23:34:40,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-28 23:34:40,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-28 23:34:40,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-28 23:34:40,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-28 23:34:40,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-28 23:34:40,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-28 23:34:40,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-10-28 23:34:40,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-28 23:34:40,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-28 23:34:40,892 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-10-28 23:34:40,892 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-10-28 23:34:40,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (1/1) ...
[2021-10-28 23:34:40,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-28 23:34:40,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/z3
[2021-10-28 23:34:40,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-10-28 23:34:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-10-28 23:34:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-10-28 23:34:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-10-28 23:34:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-10-28 23:34:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2021-10-28 23:34:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-28 23:34:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-10-28 23:34:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-10-28 23:34:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-28 23:34:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-28 23:34:41,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-28 23:34:41,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-28 23:34:41,534 INFO L299 CfgBuilder]: Removed 13 assume(true) statements.
[2021-10-28 23:34:41,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:41 BoogieIcfgContainer
[2021-10-28 23:34:41,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-28 23:34:41,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-28 23:34:41,540 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-10-28 23:34:41,544 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-10-28 23:34:41,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:34:39" (1/3) ...
[2021-10-28 23:34:41,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aafecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:34:41, skipping insertion in model container
[2021-10-28 23:34:41,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:40" (2/3) ...
[2021-10-28 23:34:41,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aafecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:34:41, skipping insertion in model container
[2021-10-28 23:34:41,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:41" (3/3) ...
[2021-10-28 23:34:41,549 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i
[2021-10-28 23:34:41,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-28 23:34:41,556 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations.
[2021-10-28 23:34:41,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-10-28 23:34:41,635 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR
[2021-10-28 23:34:41,636 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2021-10-28 23:34:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2021-10-28 23:34:41,662 INFO L505 BasicCegarLoop]: Found error trace
[2021-10-28 23:34:41,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2021-10-28 23:34:41,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-28 23:34:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-28 23:34:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times
[2021-10-28 23:34:41,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-28 23:34:41,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542746989]
[2021-10-28 23:34:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-28 23:34:41,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-28 23:34:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-28 23:34:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-28 23:34:41,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-10-28 23:34:41,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542746989]
[2021-10-28 23:34:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542746989] provided 1 perfect and 0 imperfect interpolant sequences
[2021-10-28 23:34:41,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-28 23:34:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-10-28 23:34:41,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645283017]
[2021-10-28 23:34:41,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-10-28 23:34:41,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-28 23:34:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-10-28 23:34:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-28 23:34:41,958 INFO L87 Difference]: Start difference. First operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-28 23:34:41,992 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions.
[2021-10-28 23:34:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2021-10-28 23:34:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2021-10-28 23:34:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-28 23:34:42,006 INFO L225 Difference]: With dead ends: 64
[2021-10-28 23:34:42,006 INFO L226 Difference]: Without dead ends: 26
[2021-10-28 23:34:42,035 INFO L786 BasicCegarLoop]: 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
[2021-10-28 23:34:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2021-10-28 23:34:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2021-10-28 23:34:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions.
[2021-10-28 23:34:42,082 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6
[2021-10-28 23:34:42,082 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-28 23:34:42,083 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions.
[2021-10-28 23:34:42,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions.
[2021-10-28 23:34:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2021-10-28 23:34:42,084 INFO L505 BasicCegarLoop]: Found error trace
[2021-10-28 23:34:42,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2021-10-28 23:34:42,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-10-28 23:34:42,086 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-28 23:34:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-28 23:34:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times
[2021-10-28 23:34:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-28 23:34:42,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922689507]
[2021-10-28 23:34:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-28 23:34:42,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-28 23:34:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-28 23:34:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-28 23:34:42,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-10-28 23:34:42,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922689507]
[2021-10-28 23:34:42,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922689507] provided 1 perfect and 0 imperfect interpolant sequences
[2021-10-28 23:34:42,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-28 23:34:42,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-10-28 23:34:42,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961169568]
[2021-10-28 23:34:42,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-10-28 23:34:42,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-28 23:34:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-10-28 23:34:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-10-28 23:34:42,372 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-28 23:34:42,451 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions.
[2021-10-28 23:34:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-10-28 23:34:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2021-10-28 23:34:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-28 23:34:42,453 INFO L225 Difference]: With dead ends: 42
[2021-10-28 23:34:42,454 INFO L226 Difference]: Without dead ends: 38
[2021-10-28 23:34:42,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-10-28 23:34:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2021-10-28 23:34:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28.
[2021-10-28 23:34:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions.
[2021-10-28 23:34:42,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7
[2021-10-28 23:34:42,464 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-28 23:34:42,464 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions.
[2021-10-28 23:34:42,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions.
[2021-10-28 23:34:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2021-10-28 23:34:42,466 INFO L505 BasicCegarLoop]: Found error trace
[2021-10-28 23:34:42,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-28 23:34:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-10-28 23:34:42,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-28 23:34:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-28 23:34:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times
[2021-10-28 23:34:42,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-28 23:34:42,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321934925]
[2021-10-28 23:34:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-28 23:34:42,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-28 23:34:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-28 23:34:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-28 23:34:42,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-10-28 23:34:42,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321934925]
[2021-10-28 23:34:42,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321934925] provided 1 perfect and 0 imperfect interpolant sequences
[2021-10-28 23:34:42,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-28 23:34:42,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-10-28 23:34:42,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863246887]
[2021-10-28 23:34:42,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-10-28 23:34:42,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-28 23:34:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-10-28 23:34:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-10-28 23:34:42,533 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-28 23:34:42,561 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions.
[2021-10-28 23:34:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-10-28 23:34:42,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2021-10-28 23:34:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-28 23:34:42,565 INFO L225 Difference]: With dead ends: 71
[2021-10-28 23:34:42,566 INFO L226 Difference]: Without dead ends: 49
[2021-10-28 23:34:42,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-10-28 23:34:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2021-10-28 23:34:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35.
[2021-10-28 23:34:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions.
[2021-10-28 23:34:42,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10
[2021-10-28 23:34:42,580 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-28 23:34:42,580 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions.
[2021-10-28 23:34:42,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-28 23:34:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions.
[2021-10-28 23:34:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2021-10-28 23:34:42,585 INFO L505 BasicCegarLoop]: Found error trace
[2021-10-28 23:34:42,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-28 23:34:42,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-10-28 23:34:42,586 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-28 23:34:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-28 23:34:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times
[2021-10-28 23:34:42,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-28 23:34:42,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289617419]
[2021-10-28 23:34:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-28 23:34:42,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-28 23:34:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-28 23:34:42,669 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-28 23:34:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-28 23:34:42,769 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-10-28 23:34:42,770 INFO L627 BasicCegarLoop]: Counterexample is feasible
[2021-10-28 23:34:42,771 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-28 23:34:42,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-28 23:34:42,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-28 23:34:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-10-28 23:34:42,786 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1]
[2021-10-28 23:34:42,790 INFO L179 ceAbstractionStarter]: Computing trace abstraction results
[2021-10-28 23:34:42,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:34:42 BoogieIcfgContainer
[2021-10-28 23:34:42,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-28 23:34:42,823 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-28 23:34:42,823 INFO L271 PluginConnector]: Initializing Witness Printer...
[2021-10-28 23:34:42,824 INFO L275 PluginConnector]: Witness Printer initialized
[2021-10-28 23:34:42,824 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:41" (3/4) ...
[2021-10-28 23:34:42,827 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-28 23:34:42,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/witness.graphml
[2021-10-28 23:34:42,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-28 23:34:42,894 INFO L168 Benchmark]: Toolchain (without parser) took 2928.79 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 80.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,899 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory is still 50.8 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.86 ms. Allocated memory is still 134.2 MB. Free memory was 99.0 MB in the beginning and 101.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.94 ms. Allocated memory is still 134.2 MB. Free memory was 101.7 MB in the beginning and 99.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,901 INFO L168 Benchmark]: Boogie Preprocessor took 83.59 ms. Allocated memory is still 134.2 MB. Free memory was 99.6 MB in the beginning and 97.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,911 INFO L168 Benchmark]: RCFGBuilder took 645.51 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 84.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,912 INFO L168 Benchmark]: TraceAbstraction took 1283.26 ms. Allocated memory is still 134.2 MB. Free memory was 84.5 MB in the beginning and 82.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,913 INFO L168 Benchmark]: Witness Printer took 69.03 ms. Allocated memory is still 134.2 MB. Free memory was 82.2 MB in the beginning and 80.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-28 23:34:42,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory is still 50.8 MB. There was no memory consumed. Max. memory is 16.1 GB.
* CACSL2BoogieTranslator took 752.86 ms. Allocated memory is still 134.2 MB. Free memory was 99.0 MB in the beginning and 101.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
* Boogie Procedure Inliner took 85.94 ms. Allocated memory is still 134.2 MB. Free memory was 101.7 MB in the beginning and 99.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
* Boogie Preprocessor took 83.59 ms. Allocated memory is still 134.2 MB. Free memory was 99.6 MB in the beginning and 97.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
* RCFGBuilder took 645.51 ms. Allocated memory is still 134.2 MB. Free memory was 97.9 MB in the beginning and 84.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB.
* TraceAbstraction took 1283.26 ms. Allocated memory is still 134.2 MB. Free memory was 84.5 MB in the beginning and 82.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB.
* Witness Printer took 69.03 ms. Allocated memory is still 134.2 MB. Free memory was 82.2 MB in the beginning and 80.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
* 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: 1032]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L996] SLL* head = malloc(sizeof(SLL));
[L997] head->next = head
[L998] head->data = 0
[L1000] SLL* x = head;
[L1001] int state = 1;
[L1004] COND FALSE !(__VERIFIER_nondet_int())
[L1025] x->data = state
[L1027] EXPR head->next
[L1027] x = head->next
[L1028] COND FALSE !(!(((void*)0) != x))
[L1030] EXPR x->data
[L1030] COND TRUE x->data != 0
[L1032] EXPR x->next
[L1032] EXPR x->next->data
[L1032] EXPR x->next->data != 0 && x->data > x->next->data
[L1032] EXPR x->data
[L1032] EXPR x->next
[L1032] EXPR x->next->data
[L1032] EXPR x->next->data != 0 && x->data > x->next->data
[L1032] COND TRUE !(x->next->data != 0 && x->data > x->next->data)
[L1032] reach_error()
- UnprovableResult [Line: 1023]: Unable to prove that call to reach_error is unreachable
Unable to prove that call to reach_error is unreachable
Reason: Not analyzed.
- UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable
Unable to prove that call to reach_error is unreachable
Reason: Not analyzed.
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 1 procedures, 33 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 44 SDslu, 49 SDs, 0 SdLazy, 35 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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!
[2021-10-28 23:34:42,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4837123-cb97-40bb-a677-e3a8729b9afa/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...