./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-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_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/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_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/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_b7372c19-daa8-402b-8706-7e066fdd5065/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 75e3ae35873fc976ba5f9091947bbca66fbdab4b
.....................................................................................................................................................................................................................................................................................................................................................................................
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 07:46:59,814 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-10-13 07:46:59,816 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-13 07:46:59,848 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-13 07:46:59,848 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-13 07:46:59,850 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-13 07:46:59,852 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-13 07:46:59,854 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-13 07:46:59,857 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-13 07:46:59,858 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-13 07:46:59,859 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-10-13 07:46:59,861 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-13 07:46:59,862 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-13 07:46:59,863 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-13 07:46:59,865 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-13 07:46:59,869 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-13 07:46:59,871 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-13 07:46:59,878 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-13 07:46:59,881 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-13 07:46:59,888 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-13 07:46:59,890 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-13 07:46:59,896 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-13 07:46:59,898 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-10-13 07:46:59,899 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-13 07:46:59,904 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-13 07:46:59,906 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-13 07:46:59,907 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-13 07:46:59,908 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-13 07:46:59,910 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-13 07:46:59,912 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-13 07:46:59,912 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-13 07:46:59,913 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-13 07:46:59,916 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-13 07:46:59,917 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-13 07:46:59,919 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-13 07:46:59,919 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-13 07:46:59,920 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-13 07:46:59,920 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-13 07:46:59,921 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-13 07:46:59,922 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-13 07:46:59,923 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-10-13 07:46:59,924 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf
[2021-10-13 07:46:59,976 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-10-13 07:46:59,977 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-13 07:46:59,978 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-10-13 07:46:59,978 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-10-13 07:46:59,979 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-10-13 07:46:59,979 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-10-13 07:46:59,979 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-10-13 07:46:59,979 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-10-13 07:46:59,986 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-10-13 07:46:59,986 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-10-13 07:46:59,987 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-10-13 07:46:59,988 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-10-13 07:46:59,988 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-10-13 07:46:59,988 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-10-13 07:46:59,988 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-10-13 07:46:59,989 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-13 07:46:59,990 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-10-13 07:46:59,990 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-10-13 07:46:59,990 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-10-13 07:46:59,990 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-10-13 07:46:59,991 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-10-13 07:46:59,991 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-13 07:46:59,991 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-10-13 07:46:59,991 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2021-10-13 07:46:59,992 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-10-13 07:46:59,992 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-10-13 07:46:59,992 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-10-13 07:46:59,992 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-10-13 07:46:59,993 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-13 07:46:59,994 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-10-13 07:46:59,995 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-13 07:46:59,995 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-13 07:46:59,995 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-10-13 07:46:59,996 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-13 07:46:59,996 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-10-13 07:46:59,996 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-13 07:46:59,996 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-13 07:46:59,997 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-10-13 07:46:59,997 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-10-13 07:46:59,997 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_b7372c19-daa8-402b-8706-7e066fdd5065/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_b7372c19-daa8-402b-8706-7e066fdd5065/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 -> 75e3ae35873fc976ba5f9091947bbca66fbdab4b
[2021-10-13 07:47:00,269 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-13 07:47:00,289 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-13 07:47:00,292 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-13 07:47:00,293 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-10-13 07:47:00,294 INFO  L275        PluginConnector]: CDTParser initialized
[2021-10-13 07:47:00,295 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound1.c
[2021-10-13 07:47:00,369 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/data/c2904c33c/aa0d4324885d4da5990cc9545d89e46b/FLAG8f84d683c
[2021-10-13 07:47:00,912 INFO  L306              CDTParser]: Found 1 translation units.
[2021-10-13 07:47:00,914 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound1.c
[2021-10-13 07:47:00,928 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/data/c2904c33c/aa0d4324885d4da5990cc9545d89e46b/FLAG8f84d683c
[2021-10-13 07:47:01,266 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/data/c2904c33c/aa0d4324885d4da5990cc9545d89e46b
[2021-10-13 07:47:01,276 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-13 07:47:01,279 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-13 07:47:01,281 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-13 07:47:01,281 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-13 07:47:01,285 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-13 07:47:01,286 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,289 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d3aef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01, skipping insertion in model container
[2021-10-13 07:47:01,289 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,297 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-10-13 07:47:01,313 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-10-13 07:47:01,526 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_b7372c19-daa8-402b-8706-7e066fdd5065/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound1.c[597,610]
[2021-10-13 07:47:01,551 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-13 07:47:01,565 INFO  L203         MainTranslator]: Completed pre-run
[2021-10-13 07:47:01,582 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_b7372c19-daa8-402b-8706-7e066fdd5065/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound1.c[597,610]
[2021-10-13 07:47:01,606 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-10-13 07:47:01,632 INFO  L208         MainTranslator]: Completed translation
[2021-10-13 07:47:01,633 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01 WrapperNode
[2021-10-13 07:47:01,633 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-13 07:47:01,634 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-13 07:47:01,635 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-13 07:47:01,635 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-13 07:47:01,642 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,651 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,677 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-13 07:47:01,678 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-13 07:47:01,678 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-13 07:47:01,679 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-10-13 07:47:01,687 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,687 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,698 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,699 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,708 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,717 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,718 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,721 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-13 07:47:01,728 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-13 07:47:01,728 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-10-13 07:47:01,728 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-10-13 07:47:01,729 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (1/1) ...
[2021-10-13 07:47:01,737 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-13 07:47:01,748 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 07:47:01,762 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-10-13 07:47:01,797 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-10-13 07:47:01,816 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-13 07:47:01,817 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-13 07:47:01,818 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-13 07:47:01,819 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-13 07:47:02,184 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-13 07:47:02,184 INFO  L299             CfgBuilder]: Removed 9 assume(true) statements.
[2021-10-13 07:47:02,186 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:02 BoogieIcfgContainer
[2021-10-13 07:47:02,186 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-13 07:47:02,188 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-13 07:47:02,188 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-10-13 07:47:02,204 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-10-13 07:47:02,204 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:47:01" (1/3) ...
[2021-10-13 07:47:02,205 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a92e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:02, skipping insertion in model container
[2021-10-13 07:47:02,205 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:47:01" (2/3) ...
[2021-10-13 07:47:02,205 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a92e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:47:02, skipping insertion in model container
[2021-10-13 07:47:02,205 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:02" (3/3) ...
[2021-10-13 07:47:02,207 INFO  L111   eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound1.c
[2021-10-13 07:47:02,213 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-13 07:47:02,213 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2021-10-13 07:47:02,262 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-10-13 07:47:02,268 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 07:47:02,268 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2021-10-13 07:47:02,282 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)
[2021-10-13 07:47:02,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-13 07:47:02,288 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 07:47:02,288 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-13 07:47:02,289 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-13 07:47:02,294 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 07:47:02,295 INFO  L82        PathProgramCache]: Analyzing trace with hash 79609593, now seen corresponding path program 1 times
[2021-10-13 07:47:02,304 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 07:47:02,305 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279732094]
[2021-10-13 07:47:02,305 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 07:47:02,306 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 07:47:02,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 07:47:02,445 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 07:47:02,446 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 07:47:02,446 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279732094]
[2021-10-13 07:47:02,447 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279732094] provided 1 perfect and 0 imperfect interpolant sequences
[2021-10-13 07:47:02,447 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-13 07:47:02,448 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-10-13 07:47:02,449 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232782136]
[2021-10-13 07:47:02,482 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-10-13 07:47:02,483 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 07:47:02,510 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-10-13 07:47:02,511 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-10-13 07:47:02,514 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)
[2021-10-13 07:47:02,533 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 07:47:02,533 INFO  L93              Difference]: Finished difference Result 25 states and 33 transitions.
[2021-10-13 07:47:02,533 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-10-13 07:47:02,535 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 07:47:02,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 07:47:02,544 INFO  L225             Difference]: With dead ends: 25
[2021-10-13 07:47:02,545 INFO  L226             Difference]: Without dead ends: 11
[2021-10-13 07:47:02,549 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 07:47:02,565 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2021-10-13 07:47:02,576 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2021-10-13 07:47:02,578 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)
[2021-10-13 07:47:02,580 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2021-10-13 07:47:02,581 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5
[2021-10-13 07:47:02,582 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 07:47:02,582 INFO  L470      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2021-10-13 07:47:02,583 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 07:47:02,583 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2021-10-13 07:47:02,583 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-10-13 07:47:02,584 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 07:47:02,584 INFO  L512         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-10-13 07:47:02,584 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-10-13 07:47:02,585 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-13 07:47:02,588 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 07:47:02,588 INFO  L82        PathProgramCache]: Analyzing trace with hash 78719836, now seen corresponding path program 1 times
[2021-10-13 07:47:02,589 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 07:47:02,589 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278678895]
[2021-10-13 07:47:02,589 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 07:47:02,589 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 07:47:02,623 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 07:47:02,626 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508176860]
[2021-10-13 07:47:02,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 07:47:02,627 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 07:47:02,627 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 07:47:02,629 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 07:47:02,651 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-10-13 07:47:02,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-13 07:47:02,708 INFO  L263         TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-10-13 07:47:02,713 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-10-13 07:47:02,887 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 07:47:02,888 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-10-13 07:47:02,981 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 07:47:02,981 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-10-13 07:47:02,981 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278678895]
[2021-10-13 07:47:02,982 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-10-13 07:47:02,982 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508176860]
[2021-10-13 07:47:02,982 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [508176860] provided 2 perfect and 0 imperfect interpolant sequences
[2021-10-13 07:47:02,983 INFO  L186   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2021-10-13 07:47:02,983 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4
[2021-10-13 07:47:02,983 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484595398]
[2021-10-13 07:47:02,984 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-10-13 07:47:02,985 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-10-13 07:47:02,986 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-13 07:47:02,986 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2021-10-13 07:47:02,986 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)
[2021-10-13 07:47:03,438 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-13 07:47:03,438 INFO  L93              Difference]: Finished difference Result 20 states and 23 transitions.
[2021-10-13 07:47:03,439 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-10-13 07:47:03,440 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 07:47:03,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-13 07:47:03,440 INFO  L225             Difference]: With dead ends: 20
[2021-10-13 07:47:03,440 INFO  L226             Difference]: Without dead ends: 13
[2021-10-13 07:47:03,441 INFO  L781         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2021-10-13 07:47:03,441 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2021-10-13 07:47:03,444 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2021-10-13 07:47:03,445 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 07:47:03,446 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2021-10-13 07:47:03,446 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5
[2021-10-13 07:47:03,446 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-10-13 07:47:03,446 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2021-10-13 07:47:03,447 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 07:47:03,447 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2021-10-13 07:47:03,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2021-10-13 07:47:03,448 INFO  L504         BasicCegarLoop]: Found error trace
[2021-10-13 07:47:03,448 INFO  L512         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-13 07:47:03,489 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-10-13 07:47:03,669 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2021-10-13 07:47:03,669 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-10-13 07:47:03,670 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-10-13 07:47:03,670 INFO  L82        PathProgramCache]: Analyzing trace with hash -1909642267, now seen corresponding path program 1 times
[2021-10-13 07:47:03,670 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-10-13 07:47:03,671 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113840250]
[2021-10-13 07:47:03,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 07:47:03,671 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-10-13 07:47:03,685 ERROR L247   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-10-13 07:47:03,685 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019404728]
[2021-10-13 07:47:03,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-13 07:47:03,686 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 07:47:03,686 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3
[2021-10-13 07:47:03,687 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-10-13 07:47:03,721 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-10-13 07:47:03,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-13 07:47:03,799 INFO  L354             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-13 07:47:03,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-13 07:47:03,853 INFO  L133   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2021-10-13 07:47:03,853 INFO  L626         BasicCegarLoop]: Counterexample is feasible
[2021-10-13 07:47:03,854 INFO  L764   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 07:47:03,856 INFO  L764   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION
[2021-10-13 07:47:03,941 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-10-13 07:47:04,057 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-10-13 07:47:04,063 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2021-10-13 07:47:04,087 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:47:04 BoogieIcfgContainer
[2021-10-13 07:47:04,088 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-13 07:47:04,088 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-13 07:47:04,089 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2021-10-13 07:47:04,089 INFO  L275        PluginConnector]: Witness Printer initialized
[2021-10-13 07:47:04,089 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:47:02" (3/4) ...
[2021-10-13 07:47:04,091 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-13 07:47:04,136 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/witness.graphml
[2021-10-13 07:47:04,136 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-13 07:47:04,138 INFO  L168              Benchmark]: Toolchain (without parser) took 2857.88 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 50.0 MB in the beginning and 51.7 MB in the end (delta: -1.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,138 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 66.1 MB in the beginning and 66.1 MB in the end (delta: 65.3 kB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,139 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 352.74 ms. Allocated memory is still 86.0 MB. Free memory was 49.8 MB in the beginning and 62.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,139 INFO  L168              Benchmark]: Boogie Procedure Inliner took 42.75 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 60.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,140 INFO  L168              Benchmark]: Boogie Preprocessor took 48.83 ms. Allocated memory is still 86.0 MB. Free memory was 60.9 MB in the beginning and 59.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,140 INFO  L168              Benchmark]: RCFGBuilder took 458.82 ms. Allocated memory is still 86.0 MB. Free memory was 59.8 MB in the beginning and 47.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,141 INFO  L168              Benchmark]: TraceAbstraction took 1900.02 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 47.5 MB in the beginning and 53.8 MB in the end (delta: -6.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,142 INFO  L168              Benchmark]: Witness Printer took 47.68 ms. Allocated memory is still 107.0 MB. Free memory was 53.8 MB in the beginning and 51.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-13 07:47:04,144 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 66.1 MB in the beginning and 66.1 MB in the end (delta: 65.3 kB). There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 352.74 ms. Allocated memory is still 86.0 MB. Free memory was 49.8 MB in the beginning and 62.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 42.75 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 60.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 48.83 ms. Allocated memory is still 86.0 MB. Free memory was 60.9 MB in the beginning and 59.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * RCFGBuilder took 458.82 ms. Allocated memory is still 86.0 MB. Free memory was 59.8 MB in the beginning and 47.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 1900.02 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 47.5 MB in the beginning and 53.8 MB in the end (delta: -6.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB.
 * Witness Printer took 47.68 ms. Allocated memory is still 107.0 MB. Free memory was 53.8 MB in the beginning and 51.7 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: 16]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L21]              int counter = 0;
[L23]              int X, Y;
[L24]              long long x, y, v, xy, yx;
[L25]              X = __VERIFIER_nondet_int()
[L26]              Y = __VERIFIER_nondet_int()
[L27]              v = ((long long) 2 * Y) - X
[L28]              y = 0
[L29]              x = 0
       VAL         [counter=0]
[L31]  EXPR        counter++
       VAL         [counter=1]
[L31]  COND TRUE   counter++<1
[L32]              yx = (long long) Y*x
[L33]              xy = (long long) X*y
[L14]  COND FALSE  !(!(cond))
       VAL         [counter=1]
[L35]  COND FALSE  !(!(x <= X))
[L39]  COND FALSE  !(v < 0)
[L42]              v = v + 2 * ((long long) Y - X)
[L43]              y++
[L45]              x++
       VAL         [counter=1]
[L31]  EXPR        counter++
       VAL         [counter=2]
[L31]  COND FALSE  !(counter++<1)
[L47]              xy = (long long) x*y
[L48]              yx = (long long) Y*x
[L14]  COND TRUE   !(cond)
       VAL         [counter=2]
[L16]              reach_error()
       VAL         [counter=2]

  - UnprovableResult [Line: 16]: 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: 1801.2ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 10.0ms, AutomataDifference: 520.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 16 SDslu, 8 SDs, 0 SdLazy, 14 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 419.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.3ms SsaConstructionTime, 88.5ms SatisfiabilityAnalysisTime, 319.6ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 76 SizeOfPredicates, 8 NumberOfNonLiveVariables, 59 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 07:47:04,207 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7372c19-daa8-402b-8706-7e066fdd5065/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...