./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 4e77c044
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 516995e3ae59a20b0dc721bf699a545863802fef
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-4e77c04
[2021-10-13 06:46:34,230 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-10-13 06:46:34,234 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-13 06:46:34,299 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-13 06:46:34,300 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-13 06:46:34,304 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-13 06:46:34,306 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-13 06:46:34,310 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-13 06:46:34,313 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-13 06:46:34,323 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-13 06:46:34,324 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-10-13 06:46:34,327 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-13 06:46:34,327 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-13 06:46:34,332 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-13 06:46:34,335 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-13 06:46:34,345 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-13 06:46:34,349 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-13 06:46:34,350 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-13 06:46:34,354 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-13 06:46:34,362 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-13 06:46:34,364 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-13 06:46:34,366 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-13 06:46:34,370 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-10-13 06:46:34,371 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-13 06:46:34,380 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-13 06:46:34,381 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-13 06:46:34,381 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-13 06:46:34,382 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-13 06:46:34,383 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-13 06:46:34,384 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-13 06:46:34,384 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-13 06:46:34,385 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-13 06:46:34,386 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-13 06:46:34,387 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-13 06:46:34,388 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-13 06:46:34,388 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-13 06:46:34,389 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-13 06:46:34,389 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-13 06:46:34,389 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-13 06:46:34,390 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-13 06:46:34,390 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-10-13 06:46:34,391 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf
[2021-10-13 06:46:34,421 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-10-13 06:46:34,421 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-13 06:46:34,422 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-10-13 06:46:34,422 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-10-13 06:46:34,423 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-10-13 06:46:34,423 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-10-13 06:46:34,423 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-10-13 06:46:34,423 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-10-13 06:46:34,423 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-10-13 06:46:34,424 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-10-13 06:46:34,424 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-10-13 06:46:34,424 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-10-13 06:46:34,424 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-10-13 06:46:34,425 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-10-13 06:46:34,425 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-10-13 06:46:34,425 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-13 06:46:34,426 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-10-13 06:46:34,426 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-10-13 06:46:34,426 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-10-13 06:46:34,426 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-10-13 06:46:34,426 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-10-13 06:46:34,427 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-13 06:46:34,427 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-10-13 06:46:34,427 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2021-10-13 06:46:34,427 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-10-13 06:46:34,428 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-10-13 06:46:34,428 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-10-13 06:46:34,428 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-10-13 06:46:34,428 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-13 06:46:34,428 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-10-13 06:46:34,429 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-13 06:46:34,429 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-13 06:46:34,429 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-10-13 06:46:34,429 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-13 06:46:34,429 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-10-13 06:46:34,430 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-13 06:46:34,430 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-13 06:46:34,430 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-10-13 06:46:34,430 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-10-13 06:46:34,431 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
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_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/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_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8
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 -> Taipan
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 -> 516995e3ae59a20b0dc721bf699a545863802fef
[2021-10-13 06:46:34,676 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-13 06:46:34,730 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-13 06:46:34,733 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-13 06:46:34,734 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-10-13 06:46:34,735 INFO  L275        PluginConnector]: CDTParser initialized
[2021-10-13 06:46:34,736 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c
[2021-10-13 06:46:34,820 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba/FLAG3af2e79d6
[2021-10-13 06:46:35,236 INFO  L306              CDTParser]: Found 1 translation units.
[2021-10-13 06:46:35,237 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c
[2021-10-13 06:46:35,246 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba/FLAG3af2e79d6
[2021-10-13 06:46:35,627 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/data/7672c9d63/1f521229e78e49f7b129d88530e1b9ba
[2021-10-13 06:46:35,629 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-13 06:46:35,631 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-13 06:46:35,646 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-13 06:46:35,646 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-13 06:46:35,649 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-13 06:46:35,650 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,651 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b49869c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35, skipping insertion in model container
[2021-10-13 06:46:35,651 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,658 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-10-13 06:46:35,673 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-10-13 06:46:35,833 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c[535,548]
[2021-10-13 06:46:35,854 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-13 06:46:35,863 INFO  L203         MainTranslator]: Completed pre-run
[2021-10-13 06:46:35,874 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound1.c[535,548]
[2021-10-13 06:46:35,885 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-13 06:46:35,899 INFO  L208         MainTranslator]: Completed translation
[2021-10-13 06:46:35,900 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35 WrapperNode
[2021-10-13 06:46:35,900 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-13 06:46:35,902 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-13 06:46:35,902 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-13 06:46:35,902 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-13 06:46:35,912 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,920 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,944 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-13 06:46:35,945 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-13 06:46:35,946 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-13 06:46:35,946 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-10-13 06:46:35,955 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,955 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,957 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,958 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,964 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,969 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,971 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,973 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-13 06:46:35,975 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-13 06:46:35,975 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-10-13 06:46:35,975 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-10-13 06:46:35,976 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (1/1) ...
[2021-10-13 06:46:35,985 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-13 06:46:35,997 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:46:36,011 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-10-13 06:46:36,030 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-10-13 06:46:36,067 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-13 06:46:36,067 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-13 06:46:36,068 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-13 06:46:36,069 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-13 06:46:36,630 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-13 06:46:36,630 INFO  L299             CfgBuilder]: Removed 19 assume(true) statements.
[2021-10-13 06:46:36,632 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36 BoogieIcfgContainer
[2021-10-13 06:46:36,632 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-13 06:46:36,633 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-13 06:46:36,634 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-10-13 06:46:36,637 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-10-13 06:46:36,637 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:46:35" (1/3) ...
[2021-10-13 06:46:36,638 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1eb3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:46:36, skipping insertion in model container
[2021-10-13 06:46:36,638 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:46:35" (2/3) ...
[2021-10-13 06:46:36,639 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1eb3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:46:36, skipping insertion in model container
[2021-10-13 06:46:36,639 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36" (3/3) ...
[2021-10-13 06:46:36,640 INFO  L111   eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound1.c
[2021-10-13 06:46:36,645 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-13 06:46:36,645 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations.
[2021-10-13 06:46:36,700 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-10-13 06:46:36,707 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-10-13 06:46:36,707 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 4 error locations.
[2021-10-13 06:46:36,721 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 25 states, 20 states have (on average 1.85) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:46:36,726 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-13 06:46:36,726 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 06:46:36,726 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-13 06:46:36,727 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2021-10-13 06:46:36,732 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 06:46:36,733 INFO  L82        PathProgramCache]: Analyzing trace with hash 145241150, now seen corresponding path program 1 times
[2021-10-13 06:46:36,740 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 06:46:36,741 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078495498]
[2021-10-13 06:46:36,741 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:46:36,742 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 06:46:36,818 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 06:46:36,819 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611227752]
[2021-10-13 06:46:36,819 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:46:36,819 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:46:36,820 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:46:36,838 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 06:46:36,845 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-10-13 06:46:36,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 06:46:36,897 INFO  L263         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core
[2021-10-13 06:46:36,901 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-13 06:46:36,949 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:46:36,950 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-13 06:46:36,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:46:36,979 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 06:46:36,980 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078495498]
[2021-10-13 06:46:36,980 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-13 06:46:36,980 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611227752]
[2021-10-13 06:46:36,981 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611227752] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-13 06:46:36,981 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-13 06:46:36,981 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2021-10-13 06:46:36,983 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996774152]
[2021-10-13 06:46:36,988 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-10-13 06:46:36,988 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 06:46:37,001 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-10-13 06:46:37,001 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-13 06:46:37,004 INFO  L87              Difference]: Start difference. First operand  has 25 states, 20 states have (on average 1.85) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:46:37,026 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 06:46:37,026 INFO  L93              Difference]: Finished difference Result 49 states and 73 transitions.
[2021-10-13 06:46:37,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-10-13 06:46:37,028 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2021-10-13 06:46:37,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 06:46:37,037 INFO  L225             Difference]: With dead ends: 49
[2021-10-13 06:46:37,037 INFO  L226             Difference]: Without dead ends: 23
[2021-10-13 06:46:37,040 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-13 06:46:37,057 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2021-10-13 06:46:37,081 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2021-10-13 06:46:37,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:46:37,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2021-10-13 06:46:37,085 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 5
[2021-10-13 06:46:37,086 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 06:46:37,086 INFO  L470      AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2021-10-13 06:46:37,086 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:46:37,087 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2021-10-13 06:46:37,088 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-13 06:46:37,088 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 06:46:37,089 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-13 06:46:37,112 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-10-13 06:46:37,289 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:46:37,290 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2021-10-13 06:46:37,292 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 06:46:37,292 INFO  L82        PathProgramCache]: Analyzing trace with hash 142873761, now seen corresponding path program 1 times
[2021-10-13 06:46:37,292 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 06:46:37,293 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535644221]
[2021-10-13 06:46:37,293 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:46:37,294 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 06:46:37,315 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 06:46:37,316 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799507542]
[2021-10-13 06:46:37,316 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:46:37,316 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:46:37,317 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:46:37,330 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 06:46:37,331 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-10-13 06:46:37,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 06:46:37,422 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-10-13 06:46:37,423 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-13 06:46:37,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:46:37,743 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-13 06:46:45,091 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:46:45,091 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 06:46:45,092 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535644221]
[2021-10-13 06:46:45,092 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-13 06:46:45,092 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799507542]
[2021-10-13 06:46:45,093 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799507542] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-13 06:46:45,093 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-13 06:46:45,093 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4
[2021-10-13 06:46:45,093 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268372979]
[2021-10-13 06:46:45,094 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-10-13 06:46:45,095 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 06:46:45,096 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-13 06:46:45,096 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=12, Unknown=1, NotChecked=0, Total=20
[2021-10-13 06:46:45,097 INFO  L87              Difference]: Start difference. First operand 23 states and 28 transitions. Second operand  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:46:54,922 WARN  L207               SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 30 DAG size of output: 26
[2021-10-13 06:47:00,668 WARN  L207               SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 32 DAG size of output: 25
[2021-10-13 06:47:06,600 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 06:47:06,600 INFO  L93              Difference]: Finished difference Result 42 states and 56 transitions.
[2021-10-13 06:47:06,601 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-10-13 06:47:06,601 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2021-10-13 06:47:06,601 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 06:47:06,602 INFO  L225             Difference]: With dead ends: 42
[2021-10-13 06:47:06,602 INFO  L226             Difference]: Without dead ends: 36
[2021-10-13 06:47:06,603 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22880.8ms TimeCoverageRelationStatistics Valid=22, Invalid=33, Unknown=1, NotChecked=0, Total=56
[2021-10-13 06:47:06,603 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2021-10-13 06:47:06,608 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 17.
[2021-10-13 06:47:06,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:06,609 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions.
[2021-10-13 06:47:06,609 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 5
[2021-10-13 06:47:06,609 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 06:47:06,609 INFO  L470      AbstractCegarLoop]: Abstraction has 17 states and 22 transitions.
[2021-10-13 06:47:06,609 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:06,610 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions.
[2021-10-13 06:47:06,610 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2021-10-13 06:47:06,610 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 06:47:06,610 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2021-10-13 06:47:06,649 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2021-10-13 06:47:06,810 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:06,811 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2021-10-13 06:47:06,811 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 06:47:06,812 INFO  L82        PathProgramCache]: Analyzing trace with hash 134130281, now seen corresponding path program 1 times
[2021-10-13 06:47:06,812 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 06:47:06,812 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508169067]
[2021-10-13 06:47:06,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:06,813 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 06:47:06,817 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 06:47:06,818 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792518481]
[2021-10-13 06:47:06,818 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:06,818 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:06,818 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:47:06,819 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 06:47:06,823 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-10-13 06:47:06,873 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 06:47:06,875 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core
[2021-10-13 06:47:06,877 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-13 06:47:06,916 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:47:06,916 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-13 06:47:06,944 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:47:06,945 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 06:47:06,945 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508169067]
[2021-10-13 06:47:06,945 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-13 06:47:06,946 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792518481]
[2021-10-13 06:47:06,946 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792518481] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-13 06:47:06,946 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-13 06:47:06,946 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3
[2021-10-13 06:47:06,947 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856300154]
[2021-10-13 06:47:06,947 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-10-13 06:47:06,947 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 06:47:06,948 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-10-13 06:47:06,948 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-10-13 06:47:06,948 INFO  L87              Difference]: Start difference. First operand 17 states and 22 transitions. Second operand  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:06,968 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 06:47:06,969 INFO  L93              Difference]: Finished difference Result 23 states and 28 transitions.
[2021-10-13 06:47:06,969 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-10-13 06:47:06,969 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2021-10-13 06:47:06,969 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 06:47:06,970 INFO  L225             Difference]: With dead ends: 23
[2021-10-13 06:47:06,970 INFO  L226             Difference]: Without dead ends: 19
[2021-10-13 06:47:06,970 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-10-13 06:47:06,970 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2021-10-13 06:47:06,975 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2021-10-13 06:47:06,975 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:06,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions.
[2021-10-13 06:47:06,976 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6
[2021-10-13 06:47:06,976 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 06:47:06,977 INFO  L470      AbstractCegarLoop]: Abstraction has 19 states and 24 transitions.
[2021-10-13 06:47:06,977 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:06,977 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions.
[2021-10-13 06:47:06,977 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-10-13 06:47:06,978 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 06:47:06,978 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-13 06:47:07,003 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-10-13 06:47:07,185 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:07,186 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2021-10-13 06:47:07,187 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 06:47:07,187 INFO  L82        PathProgramCache]: Analyzing trace with hash 44578946, now seen corresponding path program 1 times
[2021-10-13 06:47:07,187 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 06:47:07,188 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358473467]
[2021-10-13 06:47:07,188 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:07,188 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 06:47:07,193 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 06:47:07,193 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383254373]
[2021-10-13 06:47:07,193 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:07,193 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:07,194 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:47:07,194 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 06:47:07,208 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-10-13 06:47:07,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 06:47:07,255 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core
[2021-10-13 06:47:07,256 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-13 06:47:07,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:47:07,408 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-13 06:47:07,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-13 06:47:07,564 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 06:47:07,564 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358473467]
[2021-10-13 06:47:07,564 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-13 06:47:07,565 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383254373]
[2021-10-13 06:47:07,565 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383254373] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-13 06:47:07,566 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-13 06:47:07,566 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8
[2021-10-13 06:47:07,567 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336032665]
[2021-10-13 06:47:07,568 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-10-13 06:47:07,568 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 06:47:07,568 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-10-13 06:47:07,569 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2021-10-13 06:47:07,569 INFO  L87              Difference]: Start difference. First operand 19 states and 24 transitions. Second operand  has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:07,719 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 06:47:07,719 INFO  L93              Difference]: Finished difference Result 23 states and 27 transitions.
[2021-10-13 06:47:07,720 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-10-13 06:47:07,720 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-10-13 06:47:07,720 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 06:47:07,721 INFO  L225             Difference]: With dead ends: 23
[2021-10-13 06:47:07,721 INFO  L226             Difference]: Without dead ends: 19
[2021-10-13 06:47:07,721 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90
[2021-10-13 06:47:07,722 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2021-10-13 06:47:07,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2021-10-13 06:47:07,726 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:07,726 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions.
[2021-10-13 06:47:07,726 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8
[2021-10-13 06:47:07,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 06:47:07,727 INFO  L470      AbstractCegarLoop]: Abstraction has 19 states and 23 transitions.
[2021-10-13 06:47:07,727 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-10-13 06:47:07,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions.
[2021-10-13 06:47:07,727 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-10-13 06:47:07,728 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 06:47:07,728 INFO  L512         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-13 06:47:07,766 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-10-13 06:47:07,945 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:07,946 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] ===
[2021-10-13 06:47:07,946 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 06:47:07,946 INFO  L82        PathProgramCache]: Analyzing trace with hash 1028231639, now seen corresponding path program 1 times
[2021-10-13 06:47:07,947 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 06:47:07,947 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929398519]
[2021-10-13 06:47:07,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:07,947 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 06:47:07,956 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 06:47:07,957 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100717772]
[2021-10-13 06:47:07,957 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 06:47:07,959 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:07,959 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 06:47:07,960 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 06:47:07,965 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-10-13 06:47:08,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-13 06:47:08,034 INFO  L354             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-13 06:47:08,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-13 06:47:08,076 INFO  L133   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2021-10-13 06:47:08,089 INFO  L626         BasicCegarLoop]: Counterexample is feasible
[2021-10-13 06:47:08,091 INFO  L764   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 06:47:08,093 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 06:47:08,093 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 06:47:08,094 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 06:47:08,130 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-10-13 06:47:08,317 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 06:47:08,323 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2021-10-13 06:47:08,350 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:47:08 BoogieIcfgContainer
[2021-10-13 06:47:08,350 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-13 06:47:08,351 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-13 06:47:08,351 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2021-10-13 06:47:08,351 INFO  L275        PluginConnector]: Witness Printer initialized
[2021-10-13 06:47:08,351 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:46:36" (3/4) ...
[2021-10-13 06:47:08,354 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-13 06:47:08,416 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/witness.graphml
[2021-10-13 06:47:08,416 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-13 06:47:08,417 INFO  L168              Benchmark]: Toolchain (without parser) took 32786.09 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 70.8 MB in the beginning and 66.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,418 INFO  L168              Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,418 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 78.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,419 INFO  L168              Benchmark]: Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,420 INFO  L168              Benchmark]: Boogie Preprocessor took 28.44 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,420 INFO  L168              Benchmark]: RCFGBuilder took 657.88 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 60.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,421 INFO  L168              Benchmark]: TraceAbstraction took 31716.61 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 69.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,422 INFO  L168              Benchmark]: Witness Printer took 65.44 ms. Allocated memory is still 123.7 MB. Free memory was 69.1 MB in the beginning and 66.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-13 06:47:08,425 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 254.71 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 78.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 43.11 ms. Allocated memory is still 102.8 MB. Free memory was 77.9 MB in the beginning and 76.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 28.44 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * RCFGBuilder took 657.88 ms. Allocated memory is still 102.8 MB. Free memory was 74.9 MB in the beginning and 60.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 31716.61 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 69.1 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB.
 * Witness Printer took 65.44 ms. Allocated memory is still 123.7 MB. Free memory was 69.1 MB in the beginning and 66.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - CounterExampleResult [Line: 14]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L19]              int counter = 0;
[L21]              int A, R;
[L22]              long long u, v, r;
[L23]              A = __VERIFIER_nondet_int()
[L24]              R = __VERIFIER_nondet_int()
[L9]   COND FALSE  !(!cond)
[L9]   COND FALSE  !(!cond)
[L29]              u = ((long long) 2 * R) + 1
[L30]              v = 1
[L31]              r = ((long long) R * R) - A
       VAL         [counter=0]
[L34]  EXPR        counter++
       VAL         [counter=1]
[L34]  COND TRUE   counter++<1
[L12]  COND FALSE  !(!(cond))
       VAL         [counter=1]
[L36]  COND FALSE  !(!(r != 0))
       VAL         [counter=1]
[L39]  EXPR        counter++
       VAL         [counter=2]
[L39]  COND FALSE  !(counter++<1)
[L47]  EXPR        counter++
       VAL         [counter=3]
[L47]  COND FALSE  !(counter++<1)
[L34]  EXPR        counter++
       VAL         [counter=4]
[L34]  COND FALSE  !(counter++<1)
[L12]  COND TRUE   !(cond)
       VAL         [counter=4]
[L14]              reach_error()
       VAL         [counter=4]

  - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: Not analyzed. 
  - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: Not analyzed. 
  - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
    Unable to prove that call to reach_error is unreachable
 Reason: Not analyzed. 
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 25 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 31623.6ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 10.6ms, AutomataDifference: 21735.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 71 SDtfs, 128 SDslu, 61 SDs, 0 SdLazy, 73 SolverSat, 50 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5993.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23011.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.4ms SsaConstructionTime, 101.2ms SatisfiabilityAnalysisTime, 8149.1ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 306 SizeOfPredicates, 17 NumberOfNonLiveVariables, 247 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2021-10-13 06:47:08,457 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_342c63d6-0c6b-4c8f-9061-a63e87682cce/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...