./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 57096758
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs --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 670ec06931b62e6d0dcbdb520cd3023beaa77254
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
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-5709675
[2021-10-16 02:59:56,332 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-10-16 02:59:56,336 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-16 02:59:56,412 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-16 02:59:56,413 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-16 02:59:56,419 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-16 02:59:56,422 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-16 02:59:56,427 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-16 02:59:56,431 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-16 02:59:56,438 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-16 02:59:56,440 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-10-16 02:59:56,442 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-16 02:59:56,443 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-16 02:59:56,447 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-16 02:59:56,450 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-16 02:59:56,455 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-16 02:59:56,456 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-16 02:59:56,457 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-16 02:59:56,460 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-16 02:59:56,463 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-16 02:59:56,466 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-16 02:59:56,468 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-16 02:59:56,470 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-10-16 02:59:56,471 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-16 02:59:56,476 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-16 02:59:56,477 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-16 02:59:56,477 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-16 02:59:56,479 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-16 02:59:56,480 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-16 02:59:56,481 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-16 02:59:56,482 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-16 02:59:56,483 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-16 02:59:56,485 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-16 02:59:56,486 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-16 02:59:56,502 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-16 02:59:56,503 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-16 02:59:56,504 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-16 02:59:56,505 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-16 02:59:56,505 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-16 02:59:56,507 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-16 02:59:56,508 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-10-16 02:59:56,510 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf
[2021-10-16 02:59:56,559 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-10-16 02:59:56,560 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-16 02:59:56,561 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-10-16 02:59:56,561 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-10-16 02:59:56,561 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-10-16 02:59:56,562 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-10-16 02:59:56,562 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-10-16 02:59:56,562 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-10-16 02:59:56,563 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-10-16 02:59:56,563 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-10-16 02:59:56,563 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-10-16 02:59:56,564 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-10-16 02:59:56,564 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-10-16 02:59:56,564 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-10-16 02:59:56,564 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-10-16 02:59:56,565 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-16 02:59:56,566 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-10-16 02:59:56,566 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-10-16 02:59:56,566 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-10-16 02:59:56,567 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-10-16 02:59:56,567 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-10-16 02:59:56,567 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-16 02:59:56,568 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-10-16 02:59:56,568 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2021-10-16 02:59:56,568 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-10-16 02:59:56,568 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-10-16 02:59:56,569 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-10-16 02:59:56,569 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-10-16 02:59:56,569 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-16 02:59:56,570 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-10-16 02:59:56,570 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-16 02:59:56,570 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-16 02:59:56,571 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-10-16 02:59:56,571 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-16 02:59:56,571 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-10-16 02:59:56,572 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-16 02:59:56,572 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-16 02:59:56,572 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-10-16 02:59:56,572 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-10-16 02:59:56,573 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_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/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_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs
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 -> 670ec06931b62e6d0dcbdb520cd3023beaa77254
[2021-10-16 02:59:56,867 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-16 02:59:56,893 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-16 02:59:56,897 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-16 02:59:56,898 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-10-16 02:59:56,899 INFO  L275        PluginConnector]: CDTParser initialized
[2021-10-16 02:59:56,900 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c
[2021-10-16 02:59:56,979 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/data/5abb5bd44/e7af4c13b04b4c0f8f08ec33fb165ff3/FLAGf8b116d0e
[2021-10-16 02:59:57,727 INFO  L306              CDTParser]: Found 1 translation units.
[2021-10-16 02:59:57,730 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c
[2021-10-16 02:59:57,745 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/data/5abb5bd44/e7af4c13b04b4c0f8f08ec33fb165ff3/FLAGf8b116d0e
[2021-10-16 02:59:58,033 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/data/5abb5bd44/e7af4c13b04b4c0f8f08ec33fb165ff3
[2021-10-16 02:59:58,037 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-16 02:59:58,039 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-16 02:59:58,041 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-16 02:59:58,041 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-16 02:59:58,045 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-16 02:59:58,046 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,048 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7473e5d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58, skipping insertion in model container
[2021-10-16 02:59:58,048 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,068 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-10-16 02:59:58,089 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-10-16 02:59:58,264 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_b8b0796f-bf2d-496a-91cc-e62a48039e17/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537]
[2021-10-16 02:59:58,285 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-16 02:59:58,296 INFO  L203         MainTranslator]: Completed pre-run
[2021-10-16 02:59:58,311 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_b8b0796f-bf2d-496a-91cc-e62a48039e17/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537]
[2021-10-16 02:59:58,321 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-16 02:59:58,338 INFO  L208         MainTranslator]: Completed translation
[2021-10-16 02:59:58,339 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58 WrapperNode
[2021-10-16 02:59:58,339 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-16 02:59:58,340 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-16 02:59:58,341 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-16 02:59:58,341 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-16 02:59:58,351 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,359 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,385 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-16 02:59:58,386 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-16 02:59:58,386 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-16 02:59:58,387 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-10-16 02:59:58,398 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,398 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,400 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,401 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,406 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,411 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,412 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,415 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-16 02:59:58,416 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-16 02:59:58,416 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-10-16 02:59:58,416 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-10-16 02:59:58,417 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (1/1) ...
[2021-10-16 02:59:58,427 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-16 02:59:58,445 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 02:59:58,459 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-10-16 02:59:58,483 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-10-16 02:59:58,518 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-16 02:59:58,519 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-16 02:59:58,519 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-16 02:59:58,519 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-16 02:59:59,073 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-16 02:59:59,073 INFO  L299             CfgBuilder]: Removed 13 assume(true) statements.
[2021-10-16 02:59:59,076 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:59 BoogieIcfgContainer
[2021-10-16 02:59:59,077 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-16 02:59:59,079 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-16 02:59:59,079 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-10-16 02:59:59,091 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-10-16 02:59:59,092 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:59:58" (1/3) ...
[2021-10-16 02:59:59,093 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234cbf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:59, skipping insertion in model container
[2021-10-16 02:59:59,093 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:58" (2/3) ...
[2021-10-16 02:59:59,094 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234cbf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:59, skipping insertion in model container
[2021-10-16 02:59:59,094 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:59" (3/3) ...
[2021-10-16 02:59:59,096 INFO  L111   eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c
[2021-10-16 02:59:59,102 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-16 02:59:59,103 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2021-10-16 02:59:59,186 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-10-16 02:59:59,195 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
[2021-10-16 02:59:59,196 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2021-10-16 02:59:59,215 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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)
[2021-10-16 02:59:59,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-16 02:59:59,221 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-16 02:59:59,222 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-16 02:59:59,223 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-16 02:59:59,231 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-16 02:59:59,231 INFO  L82        PathProgramCache]: Analyzing trace with hash 98480205, now seen corresponding path program 1 times
[2021-10-16 02:59:59,244 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-16 02:59:59,245 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716438110]
[2021-10-16 02:59:59,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 02:59:59,247 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-16 02:59:59,352 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-16 02:59:59,353 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646168336]
[2021-10-16 02:59:59,354 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 02:59:59,354 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 02:59:59,354 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 02:59:59,357 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-16 02:59:59,387 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-10-16 02:59:59,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-16 02:59:59,478 INFO  L263         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core
[2021-10-16 02:59:59,483 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-16 02:59:59,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 02:59:59,550 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-16 02:59:59,571 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 02:59:59,571 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-16 02:59:59,572 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716438110]
[2021-10-16 02:59:59,572 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-16 02:59:59,573 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646168336]
[2021-10-16 02:59:59,574 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646168336] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-16 02:59:59,574 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-16 02:59:59,575 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2021-10-16 02:59:59,577 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654600535]
[2021-10-16 02:59:59,583 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-10-16 02:59:59,584 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-16 02:59:59,600 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-10-16 02:59:59,601 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-16 02:59:59,604 INFO  L87              Difference]: Start difference. First operand  has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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)
[2021-10-16 02:59:59,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-16 02:59:59,622 INFO  L93              Difference]: Finished difference Result 25 states and 33 transitions.
[2021-10-16 02:59:59,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-10-16 02:59:59,624 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
[2021-10-16 02:59:59,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-16 02:59:59,634 INFO  L225             Difference]: With dead ends: 25
[2021-10-16 02:59:59,635 INFO  L226             Difference]: Without dead ends: 11
[2021-10-16 02:59:59,638 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
[2021-10-16 02:59:59,659 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2021-10-16 02:59:59,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2021-10-16 02:59:59,675 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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)
[2021-10-16 02:59:59,676 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2021-10-16 02:59:59,678 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5
[2021-10-16 02:59:59,678 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-16 02:59:59,679 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2021-10-16 02:59:59,679 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)
[2021-10-16 02:59:59,679 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2021-10-16 02:59:59,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-16 02:59:59,680 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-16 02:59:59,681 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-16 02:59:59,732 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-10-16 02:59:59,905 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2021-10-16 02:59:59,906 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-16 02:59:59,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-16 02:59:59,907 INFO  L82        PathProgramCache]: Analyzing trace with hash 97621232, now seen corresponding path program 1 times
[2021-10-16 02:59:59,908 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-16 02:59:59,908 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80889052]
[2021-10-16 02:59:59,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 02:59:59,909 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-16 02:59:59,918 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-16 02:59:59,918 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010395495]
[2021-10-16 02:59:59,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 02:59:59,919 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 02:59:59,920 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 02:59:59,921 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-16 02:59:59,923 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-10-16 03:00:00,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-16 03:00:00,017 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-10-16 03:00:00,019 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-16 03:00:00,268 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:00,269 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-16 03:00:00,849 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:00,849 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-16 03:00:00,850 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80889052]
[2021-10-16 03:00:00,850 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-16 03:00:00,850 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010395495]
[2021-10-16 03:00:00,851 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010395495] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-16 03:00:00,851 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-16 03:00:00,851 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4
[2021-10-16 03:00:00,852 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914242967]
[2021-10-16 03:00:00,853 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-10-16 03:00:00,854 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-16 03:00:00,855 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-16 03:00:00,855 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2021-10-16 03:00:00,856 INFO  L87              Difference]: Start difference. First operand 11 states and 12 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)
[2021-10-16 03:00:04,295 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-16 03:00:04,295 INFO  L93              Difference]: Finished difference Result 25 states and 28 transitions.
[2021-10-16 03:00:04,296 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-10-16 03:00:04,296 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
[2021-10-16 03:00:04,297 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-16 03:00:04,297 INFO  L225             Difference]: With dead ends: 25
[2021-10-16 03:00:04,298 INFO  L226             Difference]: Without dead ends: 23
[2021-10-16 03:00:04,299 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2021-10-16 03:00:04,300 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2021-10-16 03:00:04,304 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14.
[2021-10-16 03:00:04,304 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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)
[2021-10-16 03:00:04,305 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2021-10-16 03:00:04,306 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5
[2021-10-16 03:00:04,306 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-16 03:00:04,306 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2021-10-16 03:00:04,307 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)
[2021-10-16 03:00:04,307 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2021-10-16 03:00:04,308 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2021-10-16 03:00:04,308 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-16 03:00:04,308 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2021-10-16 03:00:04,356 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-10-16 03:00:04,527 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:04,527 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-16 03:00:04,528 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-16 03:00:04,528 INFO  L82        PathProgramCache]: Analyzing trace with hash -1268746775, now seen corresponding path program 1 times
[2021-10-16 03:00:04,528 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-16 03:00:04,529 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340399749]
[2021-10-16 03:00:04,529 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:04,529 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-16 03:00:04,536 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-16 03:00:04,536 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924928263]
[2021-10-16 03:00:04,536 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:04,537 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:04,537 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 03:00:04,544 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-16 03:00:04,563 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-10-16 03:00:04,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-16 03:00:04,627 INFO  L263         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core
[2021-10-16 03:00:04,628 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-16 03:00:04,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:04,666 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-16 03:00:04,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:04,708 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-16 03:00:04,708 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340399749]
[2021-10-16 03:00:04,708 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-16 03:00:04,709 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924928263]
[2021-10-16 03:00:04,710 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924928263] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-16 03:00:04,710 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-16 03:00:04,716 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5
[2021-10-16 03:00:04,717 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149727176]
[2021-10-16 03:00:04,719 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-10-16 03:00:04,719 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-16 03:00:04,720 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-10-16 03:00:04,722 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-10-16 03:00:04,723 INFO  L87              Difference]: Start difference. First operand 14 states and 16 transitions. Second operand  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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)
[2021-10-16 03:00:04,765 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-16 03:00:04,765 INFO  L93              Difference]: Finished difference Result 25 states and 27 transitions.
[2021-10-16 03:00:04,766 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-10-16 03:00:04,766 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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
[2021-10-16 03:00:04,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-16 03:00:04,767 INFO  L225             Difference]: With dead ends: 25
[2021-10-16 03:00:04,768 INFO  L226             Difference]: Without dead ends: 21
[2021-10-16 03:00:04,769 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2021-10-16 03:00:04,769 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2021-10-16 03:00:04,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17.
[2021-10-16 03:00:04,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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)
[2021-10-16 03:00:04,775 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions.
[2021-10-16 03:00:04,775 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6
[2021-10-16 03:00:04,775 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-16 03:00:04,776 INFO  L470      AbstractCegarLoop]: Abstraction has 17 states and 19 transitions.
[2021-10-16 03:00:04,776 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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)
[2021-10-16 03:00:04,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions.
[2021-10-16 03:00:04,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-10-16 03:00:04,777 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-16 03:00:04,778 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-16 03:00:04,826 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-10-16 03:00:04,991 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:04,991 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-16 03:00:04,992 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-16 03:00:04,992 INFO  L82        PathProgramCache]: Analyzing trace with hash 546169794, now seen corresponding path program 1 times
[2021-10-16 03:00:04,992 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-16 03:00:04,993 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636581382]
[2021-10-16 03:00:04,993 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:04,993 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-16 03:00:04,999 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-16 03:00:05,000 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855921557]
[2021-10-16 03:00:05,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:05,000 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:05,001 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 03:00:05,002 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-16 03:00:05,008 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-10-16 03:00:05,082 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-16 03:00:05,083 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core
[2021-10-16 03:00:05,089 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-16 03:00:05,358 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:05,359 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-16 03:00:05,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-16 03:00:05,621 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-16 03:00:05,622 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636581382]
[2021-10-16 03:00:05,622 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-16 03:00:05,622 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855921557]
[2021-10-16 03:00:05,624 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855921557] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-16 03:00:05,624 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-16 03:00:05,624 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8
[2021-10-16 03:00:05,625 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576181031]
[2021-10-16 03:00:05,625 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-10-16 03:00:05,626 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-16 03:00:05,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-10-16 03:00:05,629 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2021-10-16 03:00:05,631 INFO  L87              Difference]: Start difference. First operand 17 states and 19 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)
[2021-10-16 03:00:05,870 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-16 03:00:05,871 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2021-10-16 03:00:05,871 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-10-16 03:00:05,872 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
[2021-10-16 03:00:05,872 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-16 03:00:05,874 INFO  L225             Difference]: With dead ends: 21
[2021-10-16 03:00:05,874 INFO  L226             Difference]: Without dead ends: 15
[2021-10-16 03:00:05,875 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90
[2021-10-16 03:00:05,875 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2021-10-16 03:00:05,882 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2021-10-16 03:00:05,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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)
[2021-10-16 03:00:05,884 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2021-10-16 03:00:05,884 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8
[2021-10-16 03:00:05,885 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-16 03:00:05,885 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2021-10-16 03:00:05,886 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)
[2021-10-16 03:00:05,889 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2021-10-16 03:00:05,890 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-10-16 03:00:05,892 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-16 03:00:05,892 INFO  L512         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1]
[2021-10-16 03:00:05,943 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-10-16 03:00:06,107 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:06,107 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-16 03:00:06,107 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-16 03:00:06,108 INFO  L82        PathProgramCache]: Analyzing trace with hash -1998402165, now seen corresponding path program 1 times
[2021-10-16 03:00:06,108 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-16 03:00:06,108 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666841718]
[2021-10-16 03:00:06,108 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:06,109 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-16 03:00:06,114 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-16 03:00:06,115 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420331182]
[2021-10-16 03:00:06,115 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-16 03:00:06,115 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:06,116 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3
[2021-10-16 03:00:06,117 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-16 03:00:06,129 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-10-16 03:00:06,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-16 03:00:06,272 INFO  L354             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-16 03:00:06,292 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-16 03:00:06,320 INFO  L133   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2021-10-16 03:00:06,321 INFO  L626         BasicCegarLoop]: Counterexample is feasible
[2021-10-16 03:00:06,322 INFO  L764   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-16 03:00:06,325 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-16 03:00:06,371 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-10-16 03:00:06,543 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-16 03:00:06,552 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2021-10-16 03:00:06,604 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:00:06 BoogieIcfgContainer
[2021-10-16 03:00:06,604 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-16 03:00:06,605 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-16 03:00:06,605 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2021-10-16 03:00:06,606 INFO  L275        PluginConnector]: Witness Printer initialized
[2021-10-16 03:00:06,606 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:59" (3/4) ...
[2021-10-16 03:00:06,610 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-16 03:00:06,670 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/witness.graphml
[2021-10-16 03:00:06,670 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-16 03:00:06,673 INFO  L168              Benchmark]: Toolchain (without parser) took 8632.70 ms. Allocated memory was 96.5 MB in the beginning and 140.5 MB in the end (delta: 44.0 MB). Free memory was 70.0 MB in the beginning and 90.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,673 INFO  L168              Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,674 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 298.83 ms. Allocated memory is still 96.5 MB. Free memory was 69.6 MB in the beginning and 60.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,675 INFO  L168              Benchmark]: Boogie Procedure Inliner took 45.03 ms. Allocated memory is still 96.5 MB. Free memory was 60.0 MB in the beginning and 58.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,676 INFO  L168              Benchmark]: Boogie Preprocessor took 28.86 ms. Allocated memory is still 96.5 MB. Free memory was 58.4 MB in the beginning and 57.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,677 INFO  L168              Benchmark]: RCFGBuilder took 661.06 ms. Allocated memory is still 96.5 MB. Free memory was 57.3 MB in the beginning and 42.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,678 INFO  L168              Benchmark]: TraceAbstraction took 7525.24 ms. Allocated memory was 96.5 MB in the beginning and 140.5 MB in the end (delta: 44.0 MB). Free memory was 42.1 MB in the beginning and 92.1 MB in the end (delta: -50.0 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,678 INFO  L168              Benchmark]: Witness Printer took 65.63 ms. Allocated memory is still 140.5 MB. Free memory was 92.1 MB in the beginning and 90.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-16 03:00:06,682 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 298.83 ms. Allocated memory is still 96.5 MB. Free memory was 69.6 MB in the beginning and 60.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 45.03 ms. Allocated memory is still 96.5 MB. Free memory was 60.0 MB in the beginning and 58.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 28.86 ms. Allocated memory is still 96.5 MB. Free memory was 58.4 MB in the beginning and 57.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB.
 * RCFGBuilder took 661.06 ms. Allocated memory is still 96.5 MB. Free memory was 57.3 MB in the beginning and 42.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 7525.24 ms. Allocated memory was 96.5 MB in the beginning and 140.5 MB in the end (delta: 44.0 MB). Free memory was 42.1 MB in the beginning and 92.1 MB in the end (delta: -50.0 MB). There was no memory consumed. Max. memory is 16.1 GB.
 * Witness Printer took 65.63 ms. Allocated memory is still 140.5 MB. Free memory was 92.1 MB in the beginning and 90.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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)
[L30]              u = ((long long) 2 * R) + 1
[L31]              v = 1
[L32]              r = ((long long) R * R) - A
       VAL         [counter=0]
[L34]  EXPR        counter++
       VAL         [counter=1]
[L34]  COND TRUE   counter++<2
[L12]  COND FALSE  !(!(cond))
       VAL         [counter=1]
[L36]  COND FALSE  !(!(r != 0))
[L38]  COND FALSE  !(r > 0)
[L42]              r = r + u
[L43]              u = u + 2
       VAL         [counter=1]
[L34]  EXPR        counter++
       VAL         [counter=2]
[L34]  COND TRUE   counter++<2
[L12]  COND FALSE  !(!(cond))
       VAL         [counter=2]
[L36]  COND FALSE  !(!(r != 0))
[L38]  COND FALSE  !(r > 0)
[L42]              r = r + u
[L43]              u = u + 2
       VAL         [counter=2]
[L34]  EXPR        counter++
       VAL         [counter=3]
[L34]  COND FALSE  !(counter++<2)
[L12]  COND TRUE   !(cond)
       VAL         [counter=3]
[L14]              reach_error()
       VAL         [counter=3]

  - 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, 13 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7367.0ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 15.8ms, AutomataDifference: 3795.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 41 SDslu, 47 SDs, 0 SdLazy, 43 SolverSat, 15 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3558.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 762.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.0ms SsaConstructionTime, 187.9ms SatisfiabilityAnalysisTime, 1550.7ms 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!
[2021-10-16 03:00:06,709 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8b0796f-bf2d-496a-91cc-e62a48039e17/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...