./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 a4ecdabc
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer --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-a4ecdab
[2020-11-30 01:13:10,548 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-11-30 01:13:10,550 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-11-30 01:13:10,619 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-11-30 01:13:10,620 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-11-30 01:13:10,629 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-11-30 01:13:10,634 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-11-30 01:13:10,661 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-11-30 01:13:10,664 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-11-30 01:13:10,665 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-11-30 01:13:10,666 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-11-30 01:13:10,668 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-11-30 01:13:10,669 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-11-30 01:13:10,671 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-11-30 01:13:10,672 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-11-30 01:13:10,675 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-11-30 01:13:10,676 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-11-30 01:13:10,678 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-11-30 01:13:10,680 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-11-30 01:13:10,683 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-11-30 01:13:10,685 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-11-30 01:13:10,687 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-11-30 01:13:10,689 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-11-30 01:13:10,690 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-11-30 01:13:10,694 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-11-30 01:13:10,695 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-11-30 01:13:10,695 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-11-30 01:13:10,697 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-11-30 01:13:10,697 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-11-30 01:13:10,699 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-11-30 01:13:10,699 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-11-30 01:13:10,701 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-11-30 01:13:10,702 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-11-30 01:13:10,703 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-11-30 01:13:10,704 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-11-30 01:13:10,705 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-11-30 01:13:10,705 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-11-30 01:13:10,706 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-11-30 01:13:10,706 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-11-30 01:13:10,707 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-11-30 01:13:10,708 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-11-30 01:13:10,709 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2020-11-30 01:13:10,736 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-11-30 01:13:10,737 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-11-30 01:13:10,738 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-11-30 01:13:10,739 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-11-30 01:13:10,739 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-11-30 01:13:10,739 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-11-30 01:13:10,740 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-11-30 01:13:10,740 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-11-30 01:13:10,740 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-11-30 01:13:10,740 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-11-30 01:13:10,741 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-11-30 01:13:10,741 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-11-30 01:13:10,741 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-11-30 01:13:10,741 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-11-30 01:13:10,742 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-11-30 01:13:10,742 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-11-30 01:13:10,742 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-11-30 01:13:10,743 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-11-30 01:13:10,743 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-11-30 01:13:10,743 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-11-30 01:13:10,743 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-11-30 01:13:10,744 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-11-30 01:13:10,744 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-11-30 01:13:10,744 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-11-30 01:13:10,745 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-11-30 01:13:10,745 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-11-30 01:13:10,745 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-11-30 01:13:10,745 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-11-30 01:13:10,746 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-11-30 01:13:10,746 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-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer
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
[2020-11-30 01:13:11,029 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-11-30 01:13:11,071 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-11-30 01:13:11,073 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-11-30 01:13:11,075 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-11-30 01:13:11,076 INFO  L275        PluginConnector]: CDTParser initialized
[2020-11-30 01:13:11,077 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2020-11-30 01:13:11,197 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/data/c8872d4b7/f83108b3a8fc4344b800cd60f1949c4b/FLAG6c93dbc61
[2020-11-30 01:13:11,881 INFO  L306              CDTParser]: Found 1 translation units.
[2020-11-30 01:13:11,882 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2020-11-30 01:13:11,903 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/data/c8872d4b7/f83108b3a8fc4344b800cd60f1949c4b/FLAG6c93dbc61
[2020-11-30 01:13:12,165 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/data/c8872d4b7/f83108b3a8fc4344b800cd60f1949c4b
[2020-11-30 01:13:12,168 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-11-30 01:13:12,170 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2020-11-30 01:13:12,181 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-11-30 01:13:12,181 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-11-30 01:13:12,185 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-11-30 01:13:12,186 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:12,188 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124629ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12, skipping insertion in model container
[2020-11-30 01:13:12,188 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:12,201 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-11-30 01:13:12,276 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-11-30 01:13:12,808 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-30 01:13:12,823 INFO  L203         MainTranslator]: Completed pre-run
[2020-11-30 01:13:12,896 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-30 01:13:12,980 INFO  L208         MainTranslator]: Completed translation
[2020-11-30 01:13:12,980 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12 WrapperNode
[2020-11-30 01:13:12,981 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-11-30 01:13:12,982 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-11-30 01:13:12,982 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-11-30 01:13:12,983 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2020-11-30 01:13:12,993 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,010 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,038 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-11-30 01:13:13,041 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-11-30 01:13:13,041 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-11-30 01:13:13,041 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-11-30 01:13:13,052 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,053 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,067 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,067 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,076 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,082 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,084 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
[2020-11-30 01:13:13,088 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-11-30 01:13:13,089 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-11-30 01:13:13,089 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-11-30 01:13:13,089 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-11-30 01:13:13,090 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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
[2020-11-30 01:13:13,191 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-11-30 01:13:13,192 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-11-30 01:13:13,192 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-11-30 01:13:13,192 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-11-30 01:13:13,193 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-11-30 01:13:13,193 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-11-30 01:13:13,193 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-11-30 01:13:13,193 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-11-30 01:13:13,613 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-11-30 01:13:13,622 INFO  L298             CfgBuilder]: Removed 18 assume(true) statements.
[2020-11-30 01:13:13,624 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:13 BoogieIcfgContainer
[2020-11-30 01:13:13,625 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-11-30 01:13:13,627 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-11-30 01:13:13,627 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-11-30 01:13:13,635 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-11-30 01:13:13,636 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:13:12" (1/3) ...
[2020-11-30 01:13:13,637 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70faf800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:13:13, skipping insertion in model container
[2020-11-30 01:13:13,637 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:12" (2/3) ...
[2020-11-30 01:13:13,637 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70faf800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:13:13, skipping insertion in model container
[2020-11-30 01:13:13,638 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:13" (3/3) ...
[2020-11-30 01:13:13,640 INFO  L111   eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i
[2020-11-30 01:13:13,652 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-11-30 01:13:13,657 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-11-30 01:13:13,678 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-11-30 01:13:13,710 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-11-30 01:13:13,711 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-11-30 01:13:13,711 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-11-30 01:13:13,711 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-11-30 01:13:13,711 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-11-30 01:13:13,711 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-11-30 01:13:13,712 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-11-30 01:13:13,712 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-11-30 01:13:13,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states.
[2020-11-30 01:13:13,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-11-30 01:13:13,734 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:13,735 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:13,735 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:13,746 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:13,746 INFO  L82        PathProgramCache]: Analyzing trace with hash 191422306, now seen corresponding path program 1 times
[2020-11-30 01:13:13,758 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:13,758 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723583252]
[2020-11-30 01:13:13,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:13,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:13,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:13,981 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723583252]
[2020-11-30 01:13:13,982 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-30 01:13:13,982 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-11-30 01:13:13,983 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331221982]
[2020-11-30 01:13:13,988 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-11-30 01:13:13,989 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:14,009 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-11-30 01:13:14,010 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-11-30 01:13:14,013 INFO  L87              Difference]: Start difference. First operand 26 states. Second operand 2 states.
[2020-11-30 01:13:14,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:14,040 INFO  L93              Difference]: Finished difference Result 46 states and 65 transitions.
[2020-11-30 01:13:14,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-11-30 01:13:14,042 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 14
[2020-11-30 01:13:14,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:14,055 INFO  L225             Difference]: With dead ends: 46
[2020-11-30 01:13:14,056 INFO  L226             Difference]: Without dead ends: 19
[2020-11-30 01:13:14,061 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
[2020-11-30 01:13:14,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-11-30 01:13:14,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-11-30 01:13:14,101 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-11-30 01:13:14,103 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions.
[2020-11-30 01:13:14,105 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14
[2020-11-30 01:13:14,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:14,106 INFO  L481      AbstractCegarLoop]: Abstraction has 19 states and 22 transitions.
[2020-11-30 01:13:14,106 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-11-30 01:13:14,107 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions.
[2020-11-30 01:13:14,107 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-11-30 01:13:14,107 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:14,108 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:14,109 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-11-30 01:13:14,110 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:14,114 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:14,114 INFO  L82        PathProgramCache]: Analyzing trace with hash -992019435, now seen corresponding path program 1 times
[2020-11-30 01:13:14,114 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:14,115 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468160294]
[2020-11-30 01:13:14,115 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:14,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:14,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:14,290 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468160294]
[2020-11-30 01:13:14,290 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-30 01:13:14,290 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-11-30 01:13:14,290 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025802176]
[2020-11-30 01:13:14,292 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-11-30 01:13:14,295 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:14,296 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-11-30 01:13:14,296 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-11-30 01:13:14,297 INFO  L87              Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states.
[2020-11-30 01:13:14,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:14,383 INFO  L93              Difference]: Finished difference Result 49 states and 56 transitions.
[2020-11-30 01:13:14,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-11-30 01:13:14,385 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 16
[2020-11-30 01:13:14,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:14,386 INFO  L225             Difference]: With dead ends: 49
[2020-11-30 01:13:14,386 INFO  L226             Difference]: Without dead ends: 39
[2020-11-30 01:13:14,387 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-11-30 01:13:14,388 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-11-30 01:13:14,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24.
[2020-11-30 01:13:14,393 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-11-30 01:13:14,394 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions.
[2020-11-30 01:13:14,394 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16
[2020-11-30 01:13:14,394 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:14,395 INFO  L481      AbstractCegarLoop]: Abstraction has 24 states and 29 transitions.
[2020-11-30 01:13:14,395 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-11-30 01:13:14,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions.
[2020-11-30 01:13:14,396 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-11-30 01:13:14,396 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:14,396 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:14,397 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-11-30 01:13:14,397 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:14,397 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:14,398 INFO  L82        PathProgramCache]: Analyzing trace with hash 617811326, now seen corresponding path program 1 times
[2020-11-30 01:13:14,398 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:14,398 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476539544]
[2020-11-30 01:13:14,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:14,421 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:14,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:14,541 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476539544]
[2020-11-30 01:13:14,542 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-30 01:13:14,542 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-11-30 01:13:14,542 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052409185]
[2020-11-30 01:13:14,543 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-11-30 01:13:14,543 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:14,543 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-11-30 01:13:14,544 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-11-30 01:13:14,544 INFO  L87              Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states.
[2020-11-30 01:13:14,671 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:14,671 INFO  L93              Difference]: Finished difference Result 45 states and 51 transitions.
[2020-11-30 01:13:14,673 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-11-30 01:13:14,674 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-11-30 01:13:14,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:14,675 INFO  L225             Difference]: With dead ends: 45
[2020-11-30 01:13:14,675 INFO  L226             Difference]: Without dead ends: 38
[2020-11-30 01:13:14,676 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
[2020-11-30 01:13:14,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-11-30 01:13:14,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28.
[2020-11-30 01:13:14,684 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-11-30 01:13:14,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions.
[2020-11-30 01:13:14,688 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19
[2020-11-30 01:13:14,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:14,690 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 34 transitions.
[2020-11-30 01:13:14,691 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-11-30 01:13:14,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions.
[2020-11-30 01:13:14,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-11-30 01:13:14,692 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:14,693 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:14,694 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-11-30 01:13:14,694 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:14,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:14,695 INFO  L82        PathProgramCache]: Analyzing trace with hash -2029446786, now seen corresponding path program 1 times
[2020-11-30 01:13:14,695 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:14,695 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248283012]
[2020-11-30 01:13:14,696 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:14,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:14,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:14,821 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248283012]
[2020-11-30 01:13:14,821 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409271634]
[2020-11-30 01:13:14,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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
[2020-11-30 01:13:14,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:14,915 INFO  L263         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-11-30 01:13:14,922 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-11-30 01:13:14,986 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:14,986 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2020-11-30 01:13:14,987 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6
[2020-11-30 01:13:14,987 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550347618]
[2020-11-30 01:13:14,987 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-11-30 01:13:14,988 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:14,988 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-11-30 01:13:14,989 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-11-30 01:13:14,989 INFO  L87              Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states.
[2020-11-30 01:13:15,086 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:15,086 INFO  L93              Difference]: Finished difference Result 52 states and 59 transitions.
[2020-11-30 01:13:15,087 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-11-30 01:13:15,088 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 19
[2020-11-30 01:13:15,088 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:15,089 INFO  L225             Difference]: With dead ends: 52
[2020-11-30 01:13:15,089 INFO  L226             Difference]: Without dead ends: 42
[2020-11-30 01:13:15,090 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2020-11-30 01:13:15,090 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-11-30 01:13:15,095 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 21.
[2020-11-30 01:13:15,095 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-11-30 01:13:15,096 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions.
[2020-11-30 01:13:15,099 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19
[2020-11-30 01:13:15,100 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:15,100 INFO  L481      AbstractCegarLoop]: Abstraction has 21 states and 24 transitions.
[2020-11-30 01:13:15,100 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-11-30 01:13:15,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions.
[2020-11-30 01:13:15,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-11-30 01:13:15,101 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:15,101 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:15,302 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-11-30 01:13:15,302 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:15,303 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:15,303 INFO  L82        PathProgramCache]: Analyzing trace with hash 72340444, now seen corresponding path program 1 times
[2020-11-30 01:13:15,303 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:15,304 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110996417]
[2020-11-30 01:13:15,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:15,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:15,413 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-11-30 01:13:15,413 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110996417]
[2020-11-30 01:13:15,414 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79039919]
[2020-11-30 01:13:15,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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
[2020-11-30 01:13:15,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:15,483 INFO  L263         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-11-30 01:13:15,485 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-11-30 01:13:15,522 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-11-30 01:13:15,523 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-11-30 01:13:15,523 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6
[2020-11-30 01:13:15,523 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654023538]
[2020-11-30 01:13:15,524 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-11-30 01:13:15,524 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:15,524 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-11-30 01:13:15,525 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-11-30 01:13:15,525 INFO  L87              Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states.
[2020-11-30 01:13:15,646 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:15,646 INFO  L93              Difference]: Finished difference Result 61 states and 69 transitions.
[2020-11-30 01:13:15,646 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-11-30 01:13:15,647 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 20
[2020-11-30 01:13:15,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:15,648 INFO  L225             Difference]: With dead ends: 61
[2020-11-30 01:13:15,648 INFO  L226             Difference]: Without dead ends: 50
[2020-11-30 01:13:15,648 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90
[2020-11-30 01:13:15,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-11-30 01:13:15,655 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 24.
[2020-11-30 01:13:15,655 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-11-30 01:13:15,656 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions.
[2020-11-30 01:13:15,657 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20
[2020-11-30 01:13:15,657 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:15,657 INFO  L481      AbstractCegarLoop]: Abstraction has 24 states and 27 transitions.
[2020-11-30 01:13:15,657 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-11-30 01:13:15,658 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions.
[2020-11-30 01:13:15,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-11-30 01:13:15,659 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:15,660 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:15,861 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-11-30 01:13:15,861 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:15,861 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:15,861 INFO  L82        PathProgramCache]: Analyzing trace with hash 1067124933, now seen corresponding path program 2 times
[2020-11-30 01:13:15,862 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:15,862 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542316337]
[2020-11-30 01:13:15,862 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:15,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:16,013 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-30 01:13:16,013 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542316337]
[2020-11-30 01:13:16,014 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372949968]
[2020-11-30 01:13:16,014 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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
[2020-11-30 01:13:16,095 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-11-30 01:13:16,095 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-11-30 01:13:16,096 INFO  L263         TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-11-30 01:13:16,098 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-11-30 01:13:16,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-11-30 01:13:16,187 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-11-30 01:13:16,187 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12
[2020-11-30 01:13:16,188 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923975910]
[2020-11-30 01:13:16,188 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-11-30 01:13:16,188 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:16,189 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-11-30 01:13:16,189 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2020-11-30 01:13:16,189 INFO  L87              Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 12 states.
[2020-11-30 01:13:16,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:16,479 INFO  L93              Difference]: Finished difference Result 39 states and 44 transitions.
[2020-11-30 01:13:16,481 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-11-30 01:13:16,481 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 23
[2020-11-30 01:13:16,482 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:16,482 INFO  L225             Difference]: With dead ends: 39
[2020-11-30 01:13:16,482 INFO  L226             Difference]: Without dead ends: 28
[2020-11-30 01:13:16,483 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380
[2020-11-30 01:13:16,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-11-30 01:13:16,489 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-11-30 01:13:16,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-11-30 01:13:16,490 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2020-11-30 01:13:16,491 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23
[2020-11-30 01:13:16,491 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:16,491 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2020-11-30 01:13:16,491 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-11-30 01:13:16,491 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2020-11-30 01:13:16,492 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-11-30 01:13:16,493 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:16,493 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:16,708 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-11-30 01:13:16,709 INFO  L429      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:16,709 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:16,709 INFO  L82        PathProgramCache]: Analyzing trace with hash -907290146, now seen corresponding path program 3 times
[2020-11-30 01:13:16,709 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:16,709 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831514503]
[2020-11-30 01:13:16,709 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:16,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-30 01:13:16,947 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-11-30 01:13:16,947 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831514503]
[2020-11-30 01:13:16,948 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402586087]
[2020-11-30 01:13:16,948 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/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
[2020-11-30 01:13:17,035 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2020-11-30 01:13:17,035 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-11-30 01:13:17,036 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-11-30 01:13:17,038 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-11-30 01:13:17,079 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-11-30 01:13:17,080 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-11-30 01:13:17,080 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2020-11-30 01:13:17,080 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151856119]
[2020-11-30 01:13:17,081 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-11-30 01:13:17,081 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-11-30 01:13:17,081 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-11-30 01:13:17,082 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2020-11-30 01:13:17,082 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states.
[2020-11-30 01:13:17,258 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-30 01:13:17,259 INFO  L93              Difference]: Finished difference Result 62 states and 68 transitions.
[2020-11-30 01:13:17,259 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-11-30 01:13:17,260 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 27
[2020-11-30 01:13:17,260 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-30 01:13:17,261 INFO  L225             Difference]: With dead ends: 62
[2020-11-30 01:13:17,261 INFO  L226             Difference]: Without dead ends: 55
[2020-11-30 01:13:17,261 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2020-11-30 01:13:17,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-11-30 01:13:17,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45.
[2020-11-30 01:13:17,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-11-30 01:13:17,286 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions.
[2020-11-30 01:13:17,287 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27
[2020-11-30 01:13:17,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-30 01:13:17,288 INFO  L481      AbstractCegarLoop]: Abstraction has 45 states and 51 transitions.
[2020-11-30 01:13:17,288 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-11-30 01:13:17,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions.
[2020-11-30 01:13:17,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-11-30 01:13:17,289 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-30 01:13:17,290 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-30 01:13:17,517 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-11-30 01:13:17,517 INFO  L429      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-30 01:13:17,518 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-30 01:13:17,518 INFO  L82        PathProgramCache]: Analyzing trace with hash 38835068, now seen corresponding path program 4 times
[2020-11-30 01:13:17,518 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-11-30 01:13:17,518 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315441127]
[2020-11-30 01:13:17,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-30 01:13:17,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-11-30 01:13:17,579 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-11-30 01:13:17,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-11-30 01:13:17,632 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-11-30 01:13:17,662 INFO  L173   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-11-30 01:13:17,662 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-11-30 01:13:17,662 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-11-30 01:13:17,723 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:13:17 BoogieIcfgContainer
[2020-11-30 01:13:17,723 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-11-30 01:13:17,723 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2020-11-30 01:13:17,723 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2020-11-30 01:13:17,724 INFO  L275        PluginConnector]: Witness Printer initialized
[2020-11-30 01:13:17,724 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:13" (3/4) ...
[2020-11-30 01:13:17,726 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2020-11-30 01:13:17,796 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4ac67369-5920-489a-95c3-7f96becb09fa/bin/uautomizer/witness.graphml
[2020-11-30 01:13:17,797 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2020-11-30 01:13:17,799 INFO  L168              Benchmark]: Toolchain (without parser) took 5627.51 ms. Allocated memory was 98.6 MB in the beginning and 151.0 MB in the end (delta: 52.4 MB). Free memory was 69.8 MB in the beginning and 64.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 57.1 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,799 INFO  L168              Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,800 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 800.32 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 62.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,801 INFO  L168              Benchmark]: Boogie Procedure Inliner took 57.86 ms. Allocated memory is still 98.6 MB. Free memory was 62.0 MB in the beginning and 60.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,802 INFO  L168              Benchmark]: Boogie Preprocessor took 47.29 ms. Allocated memory is still 98.6 MB. Free memory was 60.2 MB in the beginning and 58.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,803 INFO  L168              Benchmark]: RCFGBuilder took 535.83 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 58.8 MB in the beginning and 97.3 MB in the end (delta: -38.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,804 INFO  L168              Benchmark]: TraceAbstraction took 4096.33 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 96.7 MB in the beginning and 68.6 MB in the end (delta: 28.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,805 INFO  L168              Benchmark]: Witness Printer took 73.30 ms. Allocated memory is still 151.0 MB. Free memory was 67.6 MB in the beginning and 64.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB.
[2020-11-30 01:13:17,809 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 800.32 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 62.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 57.86 ms. Allocated memory is still 98.6 MB. Free memory was 62.0 MB in the beginning and 60.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 47.29 ms. Allocated memory is still 98.6 MB. Free memory was 60.2 MB in the beginning and 58.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB.
 * RCFGBuilder took 535.83 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 58.8 MB in the beginning and 97.3 MB in the end (delta: -38.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 4096.33 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 96.7 MB in the beginning and 68.6 MB in the end (delta: 28.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 16.1 GB.
 * Witness Printer took 73.30 ms. Allocated memory is still 151.0 MB. Free memory was 67.6 MB in the beginning and 64.4 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: 12]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_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)
[L12]   COND FALSE  !(0)
[L12]               __assert_fail ("0", "sll_length_check-1.c", 3, __extension__ __PRETTY_FUNCTION__)

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 218 SDslu, 348 SDs, 0 SdLazy, 258 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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, 82 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 255 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 11982 SizeOfPredicates, 12 NumberOfNonLiveVariables, 424 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...