./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 7b2dab56
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC --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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
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 0.2.0-7b2dab5
[2021-10-11 00:29:50,097 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-10-11 00:29:50,100 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-11 00:29:50,151 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-11 00:29:50,152 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-11 00:29:50,158 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-11 00:29:50,162 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-11 00:29:50,167 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-11 00:29:50,170 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-11 00:29:50,178 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-11 00:29:50,180 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-10-11 00:29:50,181 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-11 00:29:50,182 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-11 00:29:50,185 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-11 00:29:50,187 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-11 00:29:50,189 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-11 00:29:50,190 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-11 00:29:50,192 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-11 00:29:50,198 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-11 00:29:50,207 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-11 00:29:50,209 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-11 00:29:50,211 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-11 00:29:50,215 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-10-11 00:29:50,216 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-11 00:29:50,219 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-11 00:29:50,220 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-11 00:29:50,220 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-11 00:29:50,223 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-11 00:29:50,223 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-11 00:29:50,225 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-11 00:29:50,225 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-11 00:29:50,226 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-11 00:29:50,228 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-11 00:29:50,230 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-11 00:29:50,231 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-11 00:29:50,231 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-11 00:29:50,232 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-11 00:29:50,233 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-11 00:29:50,233 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-11 00:29:50,234 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-11 00:29:50,235 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-10-11 00:29:50,238 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-10-11 00:29:50,279 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-10-11 00:29:50,280 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-11 00:29:50,282 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-10-11 00:29:50,282 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-10-11 00:29:50,282 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-10-11 00:29:50,282 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-11 00:29:50,283 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-10-11 00:29:50,283 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-10-11 00:29:50,283 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-10-11 00:29:50,289 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-10-11 00:29:50,291 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-10-11 00:29:50,291 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-11 00:29:50,291 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-10-11 00:29:50,291 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-10-11 00:29:50,292 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-10-11 00:29:50,292 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-10-11 00:29:50,292 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-10-11 00:29:50,292 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-11 00:29:50,293 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-10-11 00:29:50,293 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-10-11 00:29:50,293 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-11 00:29:50,293 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-11 00:29:50,294 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-10-11 00:29:50,294 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-11 00:29:50,294 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-10-11 00:29:50,294 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-11 00:29:50,295 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-11 00:29:50,295 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-10-11 00:29:50,295 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_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/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_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC
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 -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217
[2021-10-11 00:29:50,589 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-11 00:29:50,622 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-11 00:29:50,626 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-11 00:29:50,627 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-10-11 00:29:50,628 INFO  L275        PluginConnector]: CDTParser initialized
[2021-10-11 00:29:50,629 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2021-10-11 00:29:50,698 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/data/1d010dbab/50c7bf52d93449dfa66ac5ba6fd7b138/FLAG26882c8a4
[2021-10-11 00:29:51,204 INFO  L306              CDTParser]: Found 1 translation units.
[2021-10-11 00:29:51,205 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2021-10-11 00:29:51,218 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/data/1d010dbab/50c7bf52d93449dfa66ac5ba6fd7b138/FLAG26882c8a4
[2021-10-11 00:29:51,515 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/data/1d010dbab/50c7bf52d93449dfa66ac5ba6fd7b138
[2021-10-11 00:29:51,517 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-11 00:29:51,519 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-11 00:29:51,520 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-11 00:29:51,521 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-11 00:29:51,524 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-11 00:29:51,525 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:51" (1/1) ...
[2021-10-11 00:29:51,527 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d8ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:51, skipping insertion in model container
[2021-10-11 00:29:51,527 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:51" (1/1) ...
[2021-10-11 00:29:51,537 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-10-11 00:29:51,601 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-10-11 00:29:51,926 WARN  L226   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_bcd21e17-5d17-4ef3-8f73-c96848503c53/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831]
[2021-10-11 00:29:51,929 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-11 00:29:51,939 INFO  L203         MainTranslator]: Completed pre-run
[2021-10-11 00:29:52,014 WARN  L226   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_bcd21e17-5d17-4ef3-8f73-c96848503c53/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831]
[2021-10-11 00:29:52,015 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-11 00:29:52,078 INFO  L208         MainTranslator]: Completed translation
[2021-10-11 00:29:52,078 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52 WrapperNode
[2021-10-11 00:29:52,079 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-11 00:29:52,080 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-11 00:29:52,080 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-11 00:29:52,080 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-11 00:29:52,088 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,103 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,125 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-11 00:29:52,125 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-11 00:29:52,126 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-11 00:29:52,126 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-10-11 00:29:52,135 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,136 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,140 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,143 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,153 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,164 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,166 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
[2021-10-11 00:29:52,169 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-11 00:29:52,170 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-11 00:29:52,170 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-10-11 00:29:52,170 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-10-11 00:29:52,171 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (1/1) ...
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-11 00:29:52,253 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-10-11 00:29:52,253 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2021-10-11 00:29:52,254 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-11 00:29:52,254 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-10-11 00:29:52,254 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-10-11 00:29:52,254 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-11 00:29:52,254 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-11 00:29:52,255 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-11 00:29:52,620 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-11 00:29:52,621 INFO  L299             CfgBuilder]: Removed 16 assume(true) statements.
[2021-10-11 00:29:52,622 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:52 BoogieIcfgContainer
[2021-10-11 00:29:52,637 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-11 00:29:52,641 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-11 00:29:52,642 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-10-11 00:29:52,650 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-10-11 00:29:52,652 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:29:51" (1/3) ...
[2021-10-11 00:29:52,653 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e747b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:52, skipping insertion in model container
[2021-10-11 00:29:52,654 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:52" (2/3) ...
[2021-10-11 00:29:52,654 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e747b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:52, skipping insertion in model container
[2021-10-11 00:29:52,654 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:52" (3/3) ...
[2021-10-11 00:29:52,656 INFO  L111   eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i
[2021-10-11 00:29:52,676 INFO  L180   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-11 00:29:52,679 INFO  L192   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-10-11 00:29:52,691 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-10-11 00:29:52,728 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2021-10-11 00:29:52,729 INFO  L378      AbstractCegarLoop]: Hoare is true
[2021-10-11 00:29:52,729 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2021-10-11 00:29:52,729 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-10-11 00:29:52,729 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-10-11 00:29:52,729 INFO  L382      AbstractCegarLoop]: Difference is false
[2021-10-11 00:29:52,730 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-10-11 00:29:52,730 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-10-11 00:29:52,746 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states.
[2021-10-11 00:29:52,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2021-10-11 00:29:52,751 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:52,752 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:52,752 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:52,758 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:52,758 INFO  L82        PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times
[2021-10-11 00:29:52,767 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:52,768 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877647023]
[2021-10-11 00:29:52,768 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:52,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:52,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:52,935 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877647023]
[2021-10-11 00:29:52,935 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:29:52,936 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-10-11 00:29:52,937 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729908269]
[2021-10-11 00:29:52,942 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 2 states
[2021-10-11 00:29:52,943 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:52,960 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-10-11 00:29:52,961 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-11 00:29:52,963 INFO  L87              Difference]: Start difference. First operand 23 states. Second operand 2 states.
[2021-10-11 00:29:52,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:52,982 INFO  L93              Difference]: Finished difference Result 41 states and 58 transitions.
[2021-10-11 00:29:52,982 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-10-11 00:29:52,983 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2021-10-11 00:29:52,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:53,000 INFO  L225             Difference]: With dead ends: 41
[2021-10-11 00:29:53,001 INFO  L226             Difference]: Without dead ends: 17
[2021-10-11 00:29:53,003 INFO  L677         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
[2021-10-11 00:29:53,027 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2021-10-11 00:29:53,042 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2021-10-11 00:29:53,044 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2021-10-11 00:29:53,046 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions.
[2021-10-11 00:29:53,047 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12
[2021-10-11 00:29:53,048 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:53,048 INFO  L481      AbstractCegarLoop]: Abstraction has 17 states and 20 transitions.
[2021-10-11 00:29:53,048 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2021-10-11 00:29:53,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions.
[2021-10-11 00:29:53,049 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-10-11 00:29:53,049 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:53,050 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:53,050 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-10-11 00:29:53,050 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:53,053 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:53,054 INFO  L82        PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times
[2021-10-11 00:29:53,054 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:53,054 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733827089]
[2021-10-11 00:29:53,054 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:53,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:53,224 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:53,227 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733827089]
[2021-10-11 00:29:53,228 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:29:53,228 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-10-11 00:29:53,229 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681304837]
[2021-10-11 00:29:53,230 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2021-10-11 00:29:53,231 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:53,233 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-10-11 00:29:53,234 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-10-11 00:29:53,234 INFO  L87              Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states.
[2021-10-11 00:29:53,296 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:53,296 INFO  L93              Difference]: Finished difference Result 43 states and 50 transitions.
[2021-10-11 00:29:53,297 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-10-11 00:29:53,297 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 14
[2021-10-11 00:29:53,297 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:53,300 INFO  L225             Difference]: With dead ends: 43
[2021-10-11 00:29:53,300 INFO  L226             Difference]: Without dead ends: 35
[2021-10-11 00:29:53,301 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-10-11 00:29:53,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2021-10-11 00:29:53,311 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22.
[2021-10-11 00:29:53,312 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2021-10-11 00:29:53,313 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions.
[2021-10-11 00:29:53,314 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14
[2021-10-11 00:29:53,314 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:53,314 INFO  L481      AbstractCegarLoop]: Abstraction has 22 states and 27 transitions.
[2021-10-11 00:29:53,314 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2021-10-11 00:29:53,315 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions.
[2021-10-11 00:29:53,316 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-10-11 00:29:53,316 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:53,317 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:53,318 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-10-11 00:29:53,318 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:53,319 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:53,319 INFO  L82        PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times
[2021-10-11 00:29:53,320 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:53,320 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036937257]
[2021-10-11 00:29:53,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:53,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:53,420 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:53,420 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036937257]
[2021-10-11 00:29:53,421 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:29:53,421 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-10-11 00:29:53,421 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405336776]
[2021-10-11 00:29:53,421 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-10-11 00:29:53,422 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:53,422 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-10-11 00:29:53,423 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-10-11 00:29:53,423 INFO  L87              Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states.
[2021-10-11 00:29:53,535 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:53,535 INFO  L93              Difference]: Finished difference Result 39 states and 45 transitions.
[2021-10-11 00:29:53,536 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-10-11 00:29:53,536 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 17
[2021-10-11 00:29:53,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:53,537 INFO  L225             Difference]: With dead ends: 39
[2021-10-11 00:29:53,537 INFO  L226             Difference]: Without dead ends: 34
[2021-10-11 00:29:53,538 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2021-10-11 00:29:53,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2021-10-11 00:29:53,543 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26.
[2021-10-11 00:29:53,543 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2021-10-11 00:29:53,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions.
[2021-10-11 00:29:53,544 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17
[2021-10-11 00:29:53,545 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:53,545 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 32 transitions.
[2021-10-11 00:29:53,545 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2021-10-11 00:29:53,545 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions.
[2021-10-11 00:29:53,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-10-11 00:29:53,546 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:53,546 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:53,546 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-10-11 00:29:53,546 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:53,547 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:53,547 INFO  L82        PathProgramCache]: Analyzing trace with hash -1798757859, now seen corresponding path program 1 times
[2021-10-11 00:29:53,547 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:53,547 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407058220]
[2021-10-11 00:29:53,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:53,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:53,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:53,604 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407058220]
[2021-10-11 00:29:53,605 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420207948]
[2021-10-11 00:29:53,605 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:53,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:53,682 INFO  L263         TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-10-11 00:29:53,687 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-11 00:29:53,752 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:53,752 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2021-10-11 00:29:53,752 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6
[2021-10-11 00:29:53,753 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208039062]
[2021-10-11 00:29:53,753 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-10-11 00:29:53,753 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:53,754 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-11 00:29:53,754 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-10-11 00:29:53,754 INFO  L87              Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states.
[2021-10-11 00:29:53,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:53,803 INFO  L93              Difference]: Finished difference Result 46 states and 53 transitions.
[2021-10-11 00:29:53,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-10-11 00:29:53,804 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 17
[2021-10-11 00:29:53,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:53,805 INFO  L225             Difference]: With dead ends: 46
[2021-10-11 00:29:53,805 INFO  L226             Difference]: Without dead ends: 38
[2021-10-11 00:29:53,806 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2021-10-11 00:29:53,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2021-10-11 00:29:53,810 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 19.
[2021-10-11 00:29:53,810 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2021-10-11 00:29:53,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions.
[2021-10-11 00:29:53,811 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17
[2021-10-11 00:29:53,811 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:53,811 INFO  L481      AbstractCegarLoop]: Abstraction has 19 states and 22 transitions.
[2021-10-11 00:29:53,811 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-10-11 00:29:53,811 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions.
[2021-10-11 00:29:53,812 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-10-11 00:29:53,812 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:53,812 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:54,027 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:54,028 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:54,028 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:54,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 1318509563, now seen corresponding path program 1 times
[2021-10-11 00:29:54,028 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:54,029 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529256188]
[2021-10-11 00:29:54,029 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:54,058 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:54,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-10-11 00:29:54,127 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529256188]
[2021-10-11 00:29:54,127 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424758834]
[2021-10-11 00:29:54,127 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:54,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:54,193 INFO  L263         TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-10-11 00:29:54,194 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-11 00:29:54,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-10-11 00:29:54,245 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2021-10-11 00:29:54,245 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2021-10-11 00:29:54,245 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682701848]
[2021-10-11 00:29:54,246 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2021-10-11 00:29:54,246 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:54,247 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-10-11 00:29:54,247 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2021-10-11 00:29:54,247 INFO  L87              Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 8 states.
[2021-10-11 00:29:54,325 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:54,325 INFO  L93              Difference]: Finished difference Result 55 states and 63 transitions.
[2021-10-11 00:29:54,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2021-10-11 00:29:54,326 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 18
[2021-10-11 00:29:54,326 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:54,326 INFO  L225             Difference]: With dead ends: 55
[2021-10-11 00:29:54,327 INFO  L226             Difference]: Without dead ends: 46
[2021-10-11 00:29:54,327 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90
[2021-10-11 00:29:54,328 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2021-10-11 00:29:54,332 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22.
[2021-10-11 00:29:54,332 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2021-10-11 00:29:54,332 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions.
[2021-10-11 00:29:54,333 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18
[2021-10-11 00:29:54,333 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:54,333 INFO  L481      AbstractCegarLoop]: Abstraction has 22 states and 25 transitions.
[2021-10-11 00:29:54,333 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2021-10-11 00:29:54,333 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions.
[2021-10-11 00:29:54,334 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-10-11 00:29:54,334 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:54,334 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:54,551 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:54,552 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:54,552 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:54,552 INFO  L82        PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 2 times
[2021-10-11 00:29:54,552 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:54,552 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749084]
[2021-10-11 00:29:54,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:54,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:54,656 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:29:54,656 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749084]
[2021-10-11 00:29:54,656 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095835450]
[2021-10-11 00:29:54,656 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:54,739 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-10-11 00:29:54,739 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-10-11 00:29:54,740 INFO  L263         TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core
[2021-10-11 00:29:54,743 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-11 00:29:54,869 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-10-11 00:29:54,870 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2021-10-11 00:29:54,871 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12
[2021-10-11 00:29:54,871 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214484703]
[2021-10-11 00:29:54,873 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 12 states
[2021-10-11 00:29:54,873 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:54,873 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2021-10-11 00:29:54,874 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2021-10-11 00:29:54,874 INFO  L87              Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 12 states.
[2021-10-11 00:29:55,151 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:55,151 INFO  L93              Difference]: Finished difference Result 35 states and 40 transitions.
[2021-10-11 00:29:55,158 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2021-10-11 00:29:55,159 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 21
[2021-10-11 00:29:55,159 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:55,159 INFO  L225             Difference]: With dead ends: 35
[2021-10-11 00:29:55,159 INFO  L226             Difference]: Without dead ends: 26
[2021-10-11 00:29:55,161 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380
[2021-10-11 00:29:55,161 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2021-10-11 00:29:55,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2021-10-11 00:29:55,171 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2021-10-11 00:29:55,175 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions.
[2021-10-11 00:29:55,175 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21
[2021-10-11 00:29:55,175 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:55,175 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 29 transitions.
[2021-10-11 00:29:55,175 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2021-10-11 00:29:55,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions.
[2021-10-11 00:29:55,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2021-10-11 00:29:55,176 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:55,176 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:55,387 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:55,388 INFO  L429      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:55,388 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:55,388 INFO  L82        PathProgramCache]: Analyzing trace with hash 1344305789, now seen corresponding path program 3 times
[2021-10-11 00:29:55,388 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:55,388 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967750714]
[2021-10-11 00:29:55,389 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:55,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:29:55,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-10-11 00:29:55,531 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967750714]
[2021-10-11 00:29:55,532 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514070731]
[2021-10-11 00:29:55,532 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:55,616 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2021-10-11 00:29:55,616 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-10-11 00:29:55,617 INFO  L263         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-10-11 00:29:55,621 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-11 00:29:55,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-10-11 00:29:55,703 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2021-10-11 00:29:55,703 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2021-10-11 00:29:55,703 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616198988]
[2021-10-11 00:29:55,704 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2021-10-11 00:29:55,704 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:29:55,704 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-10-11 00:29:55,704 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2021-10-11 00:29:55,705 INFO  L87              Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states.
[2021-10-11 00:29:55,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:29:55,834 INFO  L93              Difference]: Finished difference Result 56 states and 62 transitions.
[2021-10-11 00:29:55,835 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2021-10-11 00:29:55,835 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 25
[2021-10-11 00:29:55,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:29:55,839 INFO  L225             Difference]: With dead ends: 56
[2021-10-11 00:29:55,839 INFO  L226             Difference]: Without dead ends: 51
[2021-10-11 00:29:55,839 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2021-10-11 00:29:55,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2021-10-11 00:29:55,847 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43.
[2021-10-11 00:29:55,847 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2021-10-11 00:29:55,848 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions.
[2021-10-11 00:29:55,848 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25
[2021-10-11 00:29:55,848 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:29:55,848 INFO  L481      AbstractCegarLoop]: Abstraction has 43 states and 49 transitions.
[2021-10-11 00:29:55,848 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2021-10-11 00:29:55,848 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions.
[2021-10-11 00:29:55,849 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2021-10-11 00:29:55,849 INFO  L414         BasicCegarLoop]: Found error trace
[2021-10-11 00:29:55,849 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:29:56,050 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-11 00:29:56,050 INFO  L429      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:29:56,050 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:29:56,050 INFO  L82        PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times
[2021-10-11 00:29:56,053 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:29:56,053 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376892353]
[2021-10-11 00:29:56,054 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:29:56,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-11 00:29:56,117 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-11 00:29:56,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-11 00:29:56,140 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-11 00:29:56,164 INFO  L173   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-10-11 00:29:56,164 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2021-10-11 00:29:56,164 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2021-10-11 00:29:56,204 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:29:56 BoogieIcfgContainer
[2021-10-11 00:29:56,204 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-11 00:29:56,205 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-11 00:29:56,205 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2021-10-11 00:29:56,205 INFO  L275        PluginConnector]: Witness Printer initialized
[2021-10-11 00:29:56,206 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:52" (3/4) ...
[2021-10-11 00:29:56,208 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-11 00:29:56,267 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd21e17-5d17-4ef3-8f73-c96848503c53/bin/uautomizer-Z5i5R5N3CC/witness.graphml
[2021-10-11 00:29:56,267 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-11 00:29:56,268 INFO  L168              Benchmark]: Toolchain (without parser) took 4748.67 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 62.0 MB in the beginning and 86.5 MB in the end (delta: -24.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,269 INFO  L168              Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 100.7 MB. Free memory is still 79.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,269 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 558.46 ms. Allocated memory is still 100.7 MB. Free memory was 61.8 MB in the beginning and 62.0 MB in the end (delta: -166.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,270 INFO  L168              Benchmark]: Boogie Procedure Inliner took 45.26 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 60.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,271 INFO  L168              Benchmark]: Boogie Preprocessor took 43.62 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 58.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,271 INFO  L168              Benchmark]: RCFGBuilder took 467.84 ms. Allocated memory is still 100.7 MB. Free memory was 58.6 MB in the beginning and 78.0 MB in the end (delta: -19.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,272 INFO  L168              Benchmark]: TraceAbstraction took 3563.57 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 78.0 MB in the beginning and 89.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,272 INFO  L168              Benchmark]: Witness Printer took 62.05 ms. Allocated memory is still 127.9 MB. Free memory was 89.6 MB in the beginning and 86.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB.
[2021-10-11 00:29:56,275 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.56 ms. Allocated memory is still 100.7 MB. Free memory is still 79.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 558.46 ms. Allocated memory is still 100.7 MB. Free memory was 61.8 MB in the beginning and 62.0 MB in the end (delta: -166.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 45.26 ms. Allocated memory is still 100.7 MB. Free memory was 62.0 MB in the beginning and 60.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 43.62 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 58.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * RCFGBuilder took 467.84 ms. Allocated memory is still 100.7 MB. Free memory was 58.6 MB in the beginning and 78.0 MB in the end (delta: -19.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 3563.57 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 78.0 MB in the beginning and 89.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB.
 * Witness Printer took 62.05 ms. Allocated memory is still 127.9 MB. Free memory was 89.6 MB in the beginning and 86.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 613]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L603]              int len = 2;
[L604]              len < 32 && __VERIFIER_nondet_int()
[L604]              len < 32 && __VERIFIER_nondet_int()
[L604]  COND FALSE  !(len < 32 && __VERIFIER_nondet_int())
[L575]              SLL head = ((void *)0);
[L576]  COND TRUE   len > 0
[L577]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L578]  COND FALSE  !(((void *)0) == new_head)
[L581]              new_head->next = head
[L582]              head = new_head
[L583]              len--
[L576]  COND TRUE   len > 0
[L577]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L578]  COND FALSE  !(((void *)0) == new_head)
[L581]              new_head->next = head
[L582]              head = new_head
[L583]              len--
[L576]  COND TRUE   len > 0
[L577]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L578]  COND FALSE  !(((void *)0) == new_head)
[L581]              new_head->next = head
[L582]              head = new_head
[L583]              len--
[L576]  COND FALSE  !(len > 0)
[L585]              return head;
[L607]              SLL s = sll_create(len + 1);
[L588]              int len = 0;
[L589]  COND TRUE   \read(head)
[L590]              len++
[L591]  EXPR        head->next
[L591]              head = head->next
[L589]  COND TRUE   \read(head)
[L590]              len++
[L591]  EXPR        head->next
[L591]              head = head->next
[L589]  COND TRUE   \read(head)
[L590]              len++
[L591]  EXPR        head->next
[L591]              head = head->next
[L589]  COND FALSE  !(\read(head))
[L593]              return len;
[L608]  COND TRUE   len != sll_length(s)
[L613]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 211 SDslu, 289 SDs, 0 SdLazy, 248 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=7, 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, 7 MinimizatonAttempts, 72 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 231 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 10954 SizeOfPredicates, 9 NumberOfNonLiveVariables, 416 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 33/53 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!
Received shutdown request...