./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-programs/Problem101_label21.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version e04fb08f
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-programs/Problem101_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8 --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 5fa351a972cf64749c29bcaf63ee12c8e6a461f99ab329b8a720e8c423b4af17
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-e04fb08
[2022-11-16 11:07:07,613 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-16 11:07:07,615 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-16 11:07:07,643 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-16 11:07:07,644 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-16 11:07:07,645 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-16 11:07:07,646 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-16 11:07:07,648 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-16 11:07:07,650 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-16 11:07:07,651 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-16 11:07:07,652 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-16 11:07:07,653 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-16 11:07:07,653 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-16 11:07:07,654 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-16 11:07:07,656 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-16 11:07:07,657 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-16 11:07:07,664 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-16 11:07:07,672 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-16 11:07:07,677 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-16 11:07:07,679 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-16 11:07:07,680 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-16 11:07:07,686 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-16 11:07:07,689 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-16 11:07:07,690 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-16 11:07:07,694 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-16 11:07:07,694 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-16 11:07:07,694 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-16 11:07:07,695 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-16 11:07:07,696 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-16 11:07:07,697 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-16 11:07:07,697 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-16 11:07:07,703 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-16 11:07:07,705 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-16 11:07:07,706 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-16 11:07:07,709 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-16 11:07:07,709 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-16 11:07:07,710 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-16 11:07:07,710 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-16 11:07:07,711 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-16 11:07:07,711 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-16 11:07:07,712 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-16 11:07:07,713 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-16 11:07:07,766 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-16 11:07:07,766 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-16 11:07:07,766 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-16 11:07:07,767 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-16 11:07:07,767 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-16 11:07:07,768 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-16 11:07:07,768 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-16 11:07:07,768 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-16 11:07:07,769 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-16 11:07:07,769 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-16 11:07:07,769 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-16 11:07:07,769 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-16 11:07:07,770 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-16 11:07:07,771 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-16 11:07:07,771 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-16 11:07:07,771 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-16 11:07:07,771 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-16 11:07:07,772 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-16 11:07:07,772 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-16 11:07:07,772 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-16 11:07:07,772 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-16 11:07:07,772 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-16 11:07:07,773 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-16 11:07:07,773 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-16 11:07:07,773 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-16 11:07:07,775 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-16 11:07:07,776 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-16 11:07:07,776 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-16 11:07:07,776 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_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/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_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8
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 -> 5fa351a972cf64749c29bcaf63ee12c8e6a461f99ab329b8a720e8c423b4af17
[2022-11-16 11:07:08,047 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-16 11:07:08,083 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-16 11:07:08,086 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-16 11:07:08,088 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-16 11:07:08,090 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-16 11:07:08,091 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-programs/Problem101_label21.c
[2022-11-16 11:07:08,165 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/data/289e97abd/8b5498b9ef37421681311ef4f4bba2f3/FLAGc48290a8a
[2022-11-16 11:07:10,884 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-16 11:07:10,894 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/sv-benchmarks/c/eca-programs/Problem101_label21.c
[2022-11-16 11:07:11,032 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/data/289e97abd/8b5498b9ef37421681311ef4f4bba2f3/FLAGc48290a8a
[2022-11-16 11:07:11,497 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/data/289e97abd/8b5498b9ef37421681311ef4f4bba2f3
[2022-11-16 11:07:11,500 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-16 11:07:11,501 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-16 11:07:11,502 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-16 11:07:11,503 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-16 11:07:11,508 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-16 11:07:11,509 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:11" (1/1) ...
[2022-11-16 11:07:11,510 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15191f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:11, skipping insertion in model container
[2022-11-16 11:07:11,511 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:11" (1/1) ...
[2022-11-16 11:07:11,518 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-16 11:07:12,542 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-16 11:07:23,650 WARN  L229   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_5d174111-078c-4abc-b4f2-bf891895cc91/sv-benchmarks/c/eca-programs/Problem101_label21.c[2766627,2766640]
[2022-11-16 11:07:23,712 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-16 11:07:23,718 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-16 11:07:30,488 WARN  L229   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_5d174111-078c-4abc-b4f2-bf891895cc91/sv-benchmarks/c/eca-programs/Problem101_label21.c[2766627,2766640]
[2022-11-16 11:07:30,502 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-16 11:07:31,617 INFO  L208         MainTranslator]: Completed translation
[2022-11-16 11:07:31,617 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31 WrapperNode
[2022-11-16 11:07:31,617 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-16 11:07:31,618 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-16 11:07:31,618 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-16 11:07:31,618 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-16 11:07:31,625 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:32,212 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:34,480 INFO  L138                Inliner]: procedures = 59, calls = 53, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 83780
[2022-11-16 11:07:34,481 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-16 11:07:34,481 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-16 11:07:34,482 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-16 11:07:34,482 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-16 11:07:34,488 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:34,489 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:35,270 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:35,271 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:36,293 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:36,886 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:37,179 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:37,261 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:37,591 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-16 11:07:37,592 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-16 11:07:37,592 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-16 11:07:37,593 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-16 11:07:37,596 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (1/1) ...
[2022-11-16 11:07:37,606 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-16 11:07:37,626 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/z3
[2022-11-16 11:07:37,645 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-16 11:07:37,665 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d174111-078c-4abc-b4f2-bf891895cc91/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-16 11:07:37,683 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-16 11:07:37,684 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-16 11:07:37,684 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-16 11:07:37,684 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-16 11:07:37,877 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-16 11:07:37,879 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-16 11:08:26,530 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-16 11:08:26,582 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-16 11:08:26,582 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-16 11:08:26,592 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:26 BoogieIcfgContainer
[2022-11-16 11:08:26,592 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-16 11:08:26,594 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-16 11:08:26,594 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-16 11:08:26,598 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-16 11:08:26,599 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:07:11" (1/3) ...
[2022-11-16 11:08:26,599 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9535f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:26, skipping insertion in model container
[2022-11-16 11:08:26,600 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:31" (2/3) ...
[2022-11-16 11:08:26,600 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9535f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:26, skipping insertion in model container
[2022-11-16 11:08:26,600 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:26" (3/3) ...
[2022-11-16 11:08:26,601 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem101_label21.c
[2022-11-16 11:08:26,619 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-16 11:08:26,620 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-16 11:08:26,817 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-16 11:08:26,830 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56246d3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-16 11:08:26,830 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-16 11:08:26,866 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10257 states, 10255 states have (on average 1.9892735251097027) internal successors, (20400), 10256 states have internal predecessors, (20400), 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)
[2022-11-16 11:08:27,822 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10088
[2022-11-16 11:08:27,823 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:08:27,828 INFO  L195           NwaCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-16 11:08:27,830 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:08:27,837 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:08:27,843 INFO  L85        PathProgramCache]: Analyzing trace with hash 262210241, now seen corresponding path program 1 times
[2022-11-16 11:08:27,853 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:08:27,854 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488433455]
[2022-11-16 11:08:27,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:08:27,859 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:08:31,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-16 11:09:04,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-16 11:09:04,578 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-16 11:09:04,579 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488433455]
[2022-11-16 11:09:04,579 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488433455] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-16 11:09:04,580 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-16 11:09:04,581 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-16 11:09:04,583 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666777860]
[2022-11-16 11:09:04,584 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-16 11:09:04,601 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-16 11:09:04,603 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-16 11:09:04,641 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-16 11:09:04,642 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:09:04,674 INFO  L87              Difference]: Start difference. First operand  has 10257 states, 10255 states have (on average 1.9892735251097027) internal successors, (20400), 10256 states have internal predecessors, (20400), 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 3 states, 3 states have (on average 3362.3333333333335) internal successors, (10087), 2 states have internal predecessors, (10087), 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)
[2022-11-16 11:09:50,377 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-16 11:09:50,377 INFO  L93              Difference]: Finished difference Result 30716 states and 61145 transitions.
[2022-11-16 11:09:50,378 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-11-16 11:09:50,383 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3362.3333333333335) internal successors, (10087), 2 states have internal predecessors, (10087), 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 10087
[2022-11-16 11:09:50,405 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-16 11:09:50,489 INFO  L225             Difference]: With dead ends: 30716
[2022-11-16 11:09:50,490 INFO  L226             Difference]: Without dead ends: 20384
[2022-11-16 11:09:50,503 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-16 11:09:50,507 INFO  L413           NwaCegarLoop]: 5117 mSDtfsCounter, 1997 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33578 mSolverCounterSat, 7054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 5170 SdHoareTripleChecker+Invalid, 40632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 7054 IncrementalHoareTripleChecker+Valid, 33578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.5s IncrementalHoareTripleChecker+Time
[2022-11-16 11:09:50,508 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1997 Valid, 5170 Invalid, 40632 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [7054 Valid, 33578 Invalid, 0 Unknown, 0 Unchecked, 44.5s Time]
[2022-11-16 11:09:50,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20384 states.
[2022-11-16 11:09:50,996 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20384 to 20384.
[2022-11-16 11:09:51,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20384 states, 20383 states have (on average 1.7444929598194574) internal successors, (35558), 20383 states have internal predecessors, (35558), 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)
[2022-11-16 11:09:51,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20384 states to 20384 states and 35558 transitions.
[2022-11-16 11:09:51,088 INFO  L78                 Accepts]: Start accepts. Automaton has 20384 states and 35558 transitions. Word has length 10087
[2022-11-16 11:09:51,104 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-16 11:09:51,104 INFO  L495      AbstractCegarLoop]: Abstraction has 20384 states and 35558 transitions.
[2022-11-16 11:09:51,108 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3362.3333333333335) internal successors, (10087), 2 states have internal predecessors, (10087), 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)
[2022-11-16 11:09:51,108 INFO  L276                IsEmpty]: Start isEmpty. Operand 20384 states and 35558 transitions.
[2022-11-16 11:09:52,180 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10092
[2022-11-16 11:09:52,181 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-16 11:09:52,184 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-11-16 11:09:52,184 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-16 11:09:52,185 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-16 11:09:52,185 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-16 11:09:52,190 INFO  L85        PathProgramCache]: Analyzing trace with hash 1767165849, now seen corresponding path program 1 times
[2022-11-16 11:09:52,191 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-16 11:09:52,191 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706380413]
[2022-11-16 11:09:52,194 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-16 11:09:52,195 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-16 11:09:53,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat