./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version ee8e70e7
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f
........................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Using bit-precise analysis
Retrying with bit-precise analysis
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f
.............................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE
--- Real Ultimate output ---
This is Ultimate 0.2.0-ee8e70e
[2020-10-24 15:06:11,872 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-24 15:06:11,876 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-24 15:06:11,916 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-24 15:06:11,917 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-24 15:06:11,918 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-24 15:06:11,920 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-24 15:06:11,923 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-24 15:06:11,925 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-24 15:06:11,926 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-24 15:06:11,927 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-24 15:06:11,929 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-24 15:06:11,929 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-24 15:06:11,931 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-24 15:06:11,932 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-24 15:06:11,933 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-24 15:06:11,934 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-24 15:06:11,947 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-24 15:06:11,950 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-24 15:06:11,959 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-24 15:06:11,961 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-24 15:06:11,965 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-24 15:06:11,970 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-24 15:06:11,971 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-24 15:06:11,977 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-24 15:06:11,978 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-24 15:06:11,980 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-24 15:06:11,982 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-24 15:06:11,983 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-24 15:06:11,987 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-24 15:06:11,988 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-24 15:06:11,989 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-24 15:06:11,993 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-24 15:06:11,994 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-24 15:06:11,997 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-24 15:06:11,997 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-24 15:06:11,998 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-24 15:06:11,998 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-24 15:06:11,999 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-24 15:06:12,001 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-24 15:06:12,002 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-24 15:06:12,003 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2020-10-24 15:06:12,058 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-24 15:06:12,058 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-24 15:06:12,062 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-24 15:06:12,062 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-24 15:06:12,062 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-24 15:06:12,062 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-24 15:06:12,063 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-24 15:06:12,063 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-24 15:06:12,063 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-24 15:06:12,063 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-24 15:06:12,064 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-24 15:06:12,065 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-24 15:06:12,065 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-24 15:06:12,065 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-24 15:06:12,065 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-24 15:06:12,065 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-24 15:06:12,066 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-24 15:06:12,066 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-24 15:06:12,066 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-24 15:06:12,066 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-24 15:06:12,066 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-24 15:06:12,067 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-24 15:06:12,067 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-24 15:06:12,067 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-24 15:06:12,067 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-24 15:06:12,068 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-24 15:06:12,068 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-24 15:06:12,069 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-24 15:06:12,069 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-24 15:06:12,069 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f
[2020-10-24 15:06:12,454 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-24 15:06:12,488 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-24 15:06:12,493 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-24 15:06:12,495 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-24 15:06:12,496 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-24 15:06:12,497 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c
[2020-10-24 15:06:12,572 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/519110072/2168e776eae346d8bdca435fd6df76d6/FLAG0791b9465
[2020-10-24 15:06:13,256 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-24 15:06:13,256 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c
[2020-10-24 15:06:13,265 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/519110072/2168e776eae346d8bdca435fd6df76d6/FLAG0791b9465
[2020-10-24 15:06:13,593 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/519110072/2168e776eae346d8bdca435fd6df76d6
[2020-10-24 15:06:13,598 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-24 15:06:13,610 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2020-10-24 15:06:13,614 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-24 15:06:13,614 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-24 15:06:13,618 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-24 15:06:13,619 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:13,648 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fda51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13, skipping insertion in model container
[2020-10-24 15:06:13,648 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:13,678 INFO  L146         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-24 15:06:13,711 INFO  L179         MainTranslator]: Built tables and reachable declarations
[2020-10-24 15:06:13,893 INFO  L211          PostProcessor]: Analyzing one entry point: main
[2020-10-24 15:06:13,909 INFO  L212         MainTranslator]: Completed pre-run
[2020-10-24 15:06:13,937 INFO  L211          PostProcessor]: Analyzing one entry point: main
[2020-10-24 15:06:13,956 INFO  L217         MainTranslator]: Completed translation
[2020-10-24 15:06:13,957 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13 WrapperNode
[2020-10-24 15:06:13,957 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-24 15:06:13,958 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-10-24 15:06:13,959 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-10-24 15:06:13,959 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2020-10-24 15:06:13,968 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:13,978 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,008 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-10-24 15:06:14,009 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-24 15:06:14,009 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-24 15:06:14,009 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-24 15:06:14,020 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,020 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,025 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,025 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,042 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,058 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,062 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
[2020-10-24 15:06:14,068 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-24 15:06:14,069 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-24 15:06:14,071 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-24 15:06:14,071 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-24 15:06:14,072 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-24 15:06:14,162 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-24 15:06:14,162 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-24 15:06:14,162 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-10-24 15:06:14,162 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-24 15:06:14,163 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-24 15:06:14,163 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-24 15:06:14,163 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-24 15:06:14,639 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-24 15:06:14,639 INFO  L298             CfgBuilder]: Removed 18 assume(true) statements.
[2020-10-24 15:06:14,641 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:14 BoogieIcfgContainer
[2020-10-24 15:06:14,641 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-24 15:06:14,643 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-24 15:06:14,643 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-24 15:06:14,647 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-24 15:06:14,647 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:06:13" (1/3) ...
[2020-10-24 15:06:14,648 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:06:14, skipping insertion in model container
[2020-10-24 15:06:14,648 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:13" (2/3) ...
[2020-10-24 15:06:14,649 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:06:14, skipping insertion in model container
[2020-10-24 15:06:14,649 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:14" (3/3) ...
[2020-10-24 15:06:14,650 INFO  L111   eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c
[2020-10-24 15:06:14,671 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-10-24 15:06:14,676 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-24 15:06:14,691 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-24 15:06:14,721 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-24 15:06:14,722 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-24 15:06:14,722 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-10-24 15:06:14,722 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-24 15:06:14,722 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-24 15:06:14,722 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-24 15:06:14,722 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-24 15:06:14,722 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-24 15:06:14,738 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states.
[2020-10-24 15:06:14,745 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-10-24 15:06:14,745 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:14,746 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:14,747 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:14,754 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:14,755 INFO  L82        PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times
[2020-10-24 15:06:14,766 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:14,767 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904842657]
[2020-10-24 15:06:14,767 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:14,889 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:14,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:14,934 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904842657]
[2020-10-24 15:06:14,935 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:14,936 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-10-24 15:06:14,937 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084799334]
[2020-10-24 15:06:14,942 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-10-24 15:06:14,942 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-24 15:06:14,962 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-10-24 15:06:14,964 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-10-24 15:06:14,967 INFO  L87              Difference]: Start difference. First operand 31 states. Second operand 2 states.
[2020-10-24 15:06:14,993 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:14,993 INFO  L93              Difference]: Finished difference Result 57 states and 88 transitions.
[2020-10-24 15:06:14,993 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-10-24 15:06:14,995 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-10-24 15:06:14,996 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:15,023 INFO  L225             Difference]: With dead ends: 57
[2020-10-24 15:06:15,025 INFO  L226             Difference]: Without dead ends: 26
[2020-10-24 15:06:15,032 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-10-24 15:06:15,054 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-10-24 15:06:15,079 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2020-10-24 15:06:15,082 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-10-24 15:06:15,085 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions.
[2020-10-24 15:06:15,088 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11
[2020-10-24 15:06:15,089 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:15,089 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 36 transitions.
[2020-10-24 15:06:15,090 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-10-24 15:06:15,090 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions.
[2020-10-24 15:06:15,091 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-10-24 15:06:15,091 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:15,091 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:15,092 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-24 15:06:15,093 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:15,096 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:15,096 INFO  L82        PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times
[2020-10-24 15:06:15,097 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:15,098 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220689884]
[2020-10-24 15:06:15,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:15,163 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:15,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:15,236 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220689884]
[2020-10-24 15:06:15,237 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:15,237 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-24 15:06:15,237 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439866554]
[2020-10-24 15:06:15,239 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-24 15:06:15,239 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-24 15:06:15,240 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-24 15:06:15,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-24 15:06:15,241 INFO  L87              Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states.
[2020-10-24 15:06:15,335 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:15,335 INFO  L93              Difference]: Finished difference Result 40 states and 51 transitions.
[2020-10-24 15:06:15,336 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-10-24 15:06:15,336 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 12
[2020-10-24 15:06:15,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:15,338 INFO  L225             Difference]: With dead ends: 40
[2020-10-24 15:06:15,338 INFO  L226             Difference]: Without dead ends: 36
[2020-10-24 15:06:15,339 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-24 15:06:15,340 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-10-24 15:06:15,345 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28.
[2020-10-24 15:06:15,345 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-24 15:06:15,347 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2020-10-24 15:06:15,347 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12
[2020-10-24 15:06:15,347 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:15,348 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2020-10-24 15:06:15,348 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-24 15:06:15,348 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2020-10-24 15:06:15,349 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-10-24 15:06:15,349 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:15,349 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:15,349 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-24 15:06:15,350 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:15,350 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:15,351 INFO  L82        PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times
[2020-10-24 15:06:15,351 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:15,351 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269565092]
[2020-10-24 15:06:15,352 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:15,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:15,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:15,418 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269565092]
[2020-10-24 15:06:15,419 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:15,419 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-24 15:06:15,419 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563135418]
[2020-10-24 15:06:15,419 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-24 15:06:15,420 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-24 15:06:15,420 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-24 15:06:15,421 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-24 15:06:15,421 INFO  L87              Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states.
[2020-10-24 15:06:15,503 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:15,503 INFO  L93              Difference]: Finished difference Result 42 states and 53 transitions.
[2020-10-24 15:06:15,504 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-10-24 15:06:15,504 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 13
[2020-10-24 15:06:15,504 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:15,505 INFO  L225             Difference]: With dead ends: 42
[2020-10-24 15:06:15,506 INFO  L226             Difference]: Without dead ends: 38
[2020-10-24 15:06:15,506 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-24 15:06:15,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-10-24 15:06:15,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28.
[2020-10-24 15:06:15,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-24 15:06:15,513 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2020-10-24 15:06:15,513 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13
[2020-10-24 15:06:15,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:15,514 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2020-10-24 15:06:15,514 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-24 15:06:15,515 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2020-10-24 15:06:15,515 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-10-24 15:06:15,516 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:15,516 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:15,516 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-24 15:06:15,517 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:15,517 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:15,517 INFO  L82        PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times
[2020-10-24 15:06:15,518 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:15,518 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158138822]
[2020-10-24 15:06:15,518 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:15,543 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:15,605 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:15,608 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158138822]
[2020-10-24 15:06:15,609 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:15,609 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-24 15:06:15,609 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874013870]
[2020-10-24 15:06:15,610 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-24 15:06:15,612 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-24 15:06:15,613 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-24 15:06:15,613 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-24 15:06:15,613 INFO  L87              Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states.
[2020-10-24 15:06:15,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:15,708 INFO  L93              Difference]: Finished difference Result 44 states and 55 transitions.
[2020-10-24 15:06:15,709 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-10-24 15:06:15,709 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 14
[2020-10-24 15:06:15,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:15,711 INFO  L225             Difference]: With dead ends: 44
[2020-10-24 15:06:15,711 INFO  L226             Difference]: Without dead ends: 40
[2020-10-24 15:06:15,712 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-24 15:06:15,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-10-24 15:06:15,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28.
[2020-10-24 15:06:15,718 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-24 15:06:15,719 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2020-10-24 15:06:15,720 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14
[2020-10-24 15:06:15,720 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:15,720 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2020-10-24 15:06:15,720 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-24 15:06:15,720 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2020-10-24 15:06:15,721 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-10-24 15:06:15,722 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:15,722 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:15,722 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-24 15:06:15,723 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:15,723 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:15,723 INFO  L82        PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times
[2020-10-24 15:06:15,724 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:15,724 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803387402]
[2020-10-24 15:06:15,724 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:15,746 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:15,857 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:15,860 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803387402]
[2020-10-24 15:06:15,861 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:15,861 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-24 15:06:15,861 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106386763]
[2020-10-24 15:06:15,862 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-24 15:06:15,864 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-24 15:06:15,865 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-24 15:06:15,865 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-24 15:06:15,865 INFO  L87              Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states.
[2020-10-24 15:06:15,986 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:15,986 INFO  L93              Difference]: Finished difference Result 42 states and 53 transitions.
[2020-10-24 15:06:15,987 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-10-24 15:06:15,987 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 15
[2020-10-24 15:06:15,988 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:15,989 INFO  L225             Difference]: With dead ends: 42
[2020-10-24 15:06:15,989 INFO  L226             Difference]: Without dead ends: 38
[2020-10-24 15:06:15,989 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-24 15:06:15,990 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-10-24 15:06:15,994 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28.
[2020-10-24 15:06:15,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-24 15:06:15,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2020-10-24 15:06:15,996 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15
[2020-10-24 15:06:15,996 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:15,997 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2020-10-24 15:06:15,997 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-24 15:06:15,997 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2020-10-24 15:06:15,998 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-10-24 15:06:15,998 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:15,998 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:15,998 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-24 15:06:15,999 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:15,999 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:16,000 INFO  L82        PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times
[2020-10-24 15:06:16,000 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-24 15:06:16,000 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000011474]
[2020-10-24 15:06:16,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-24 15:06:16,035 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-24 15:06:16,035 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-24 15:06:16,068 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-24 15:06:16,068 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-24 15:06:16,098 INFO  L173   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-10-24 15:06:16,098 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-10-24 15:06:16,098 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-10-24 15:06:16,134 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 03:06:16 BoogieIcfgContainer
[2020-10-24 15:06:16,134 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-10-24 15:06:16,135 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2020-10-24 15:06:16,135 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2020-10-24 15:06:16,135 INFO  L275        PluginConnector]: Witness Printer initialized
[2020-10-24 15:06:16,136 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:14" (3/4) ...
[2020-10-24 15:06:16,139 INFO  L140         WitnessPrinter]: No result that supports witness generation found
[2020-10-24 15:06:16,140 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2020-10-24 15:06:16,143 INFO  L168              Benchmark]: Toolchain (without parser) took 2540.84 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 22.1 MB in the beginning and 39.1 MB in the end (delta: -16.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,143 INFO  L168              Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 44.0 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,144 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 343.62 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 31.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,145 INFO  L168              Benchmark]: Boogie Procedure Inliner took 49.42 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 29.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,146 INFO  L168              Benchmark]: Boogie Preprocessor took 59.34 ms. Allocated memory is still 54.5 MB. Free memory was 29.1 MB in the beginning and 27.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,147 INFO  L168              Benchmark]: RCFGBuilder took 572.72 ms. Allocated memory is still 54.5 MB. Free memory was 27.6 MB in the beginning and 23.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,148 INFO  L168              Benchmark]: TraceAbstraction took 1491.01 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 23.3 MB in the beginning and 39.5 MB in the end (delta: -16.2 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,149 INFO  L168              Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 67.1 MB. Free memory was 39.5 MB in the beginning and 39.1 MB in the end (delta: 431.5 kB). There was no memory consumed. Max. memory is 16.1 GB.
[2020-10-24 15:06:16,156 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.89 ms. Allocated memory is still 44.0 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 343.62 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 31.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 49.42 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 29.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 59.34 ms. Allocated memory is still 54.5 MB. Free memory was 29.1 MB in the beginning and 27.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * RCFGBuilder took 572.72 ms. Allocated memory is still 54.5 MB. Free memory was 27.6 MB in the beginning and 23.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 1491.01 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 23.3 MB in the beginning and 39.5 MB in the end (delta: -16.2 MB). There was no memory consumed. Max. memory is 16.1 GB.
 * Witness Printer took 5.13 ms. Allocated memory is still 67.1 MB. Free memory was 39.5 MB in the beginning and 39.1 MB in the end (delta: 431.5 kB). There was no memory consumed. Max. memory is 16.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable
    Unable to prove that call of __VERIFIER_error() unreachable
 Reason: overapproximation of someBinaryArithmeticDOUBLE_SMToperation at line 67, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 79. 
Possible FailurePath: 
[L66]                  double x = __VERIFIER_nondet_double();
[L67]                  double y = 0.0 / 0.0;
[L18]                  return x != x;
[L74]      COND TRUE   !isnan_double(x)
[L29]                  __uint32_t msw, lsw;
[L32]                  ieee_double_shape_type ew_u;
[L33]                  ew_u.value = (x)
[L34]      EXPR        ew_u.parts.msw
[L34]                  (msw) = ew_u.parts.msw
[L35]      EXPR        ew_u.parts.lsw
[L35]                  (lsw) = ew_u.parts.lsw
[L38-L39]  COND FALSE  !((msw == 0x00000000 && lsw == 0x00000000) ||
      (msw == 0x80000000 && lsw == 0x00000000))
[L41-L42]  COND FALSE  !((msw >= 0x00100000 && msw <= 0x7fefffff) ||
           (msw >= 0x80100000 && msw <= 0xffefffff))
[L44-L45]  COND FALSE  !(( msw <= 0x000fffff) ||
           (msw >= 0x80000000 && msw <= 0x800fffff))
[L48-L49]  COND FALSE  !((msw == 0x7ff00000 && lsw == 0x00000000) ||
           (msw == 0xfff00000 && lsw == 0x00000000))
[L52]                  return 0;
[L57]      COND TRUE   __fpclassify_double(x) == 0
[L58]                  return y;
[L76]                  double res = fmax_double(x, y);
[L79]      COND TRUE   res != x
[L3]                   __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error")

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...

### Bit-precise run ###
This is Ultimate 0.2.0-ee8e70e
[2020-10-24 15:06:18,804 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-24 15:06:18,807 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-24 15:06:18,859 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-24 15:06:18,860 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-24 15:06:18,866 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-24 15:06:18,871 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-24 15:06:18,875 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-24 15:06:18,882 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-24 15:06:18,889 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-24 15:06:18,890 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-24 15:06:18,892 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-24 15:06:18,892 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-24 15:06:18,896 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-24 15:06:18,898 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-24 15:06:18,900 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-24 15:06:18,901 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-24 15:06:18,905 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-24 15:06:18,908 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-24 15:06:18,917 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-24 15:06:18,919 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-24 15:06:18,922 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-24 15:06:18,927 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-24 15:06:18,929 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-24 15:06:18,938 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-24 15:06:18,939 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-24 15:06:18,939 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-24 15:06:18,942 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-24 15:06:18,942 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-24 15:06:18,944 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-24 15:06:18,944 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-24 15:06:18,945 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-24 15:06:18,948 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-24 15:06:18,949 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-24 15:06:18,951 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-24 15:06:18,951 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-24 15:06:18,964 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-24 15:06:18,965 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-24 15:06:18,965 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-24 15:06:18,968 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-24 15:06:18,969 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-24 15:06:18,970 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2020-10-24 15:06:19,030 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-24 15:06:19,031 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-24 15:06:19,034 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-24 15:06:19,034 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-24 15:06:19,035 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-24 15:06:19,035 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-24 15:06:19,035 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-24 15:06:19,035 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-24 15:06:19,036 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-24 15:06:19,036 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-24 15:06:19,037 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-24 15:06:19,038 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-24 15:06:19,038 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2020-10-24 15:06:19,038 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2020-10-24 15:06:19,038 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-24 15:06:19,039 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-24 15:06:19,039 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-24 15:06:19,039 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-24 15:06:19,040 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-24 15:06:19,040 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-24 15:06:19,040 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-24 15:06:19,041 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-24 15:06:19,041 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-24 15:06:19,041 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-24 15:06:19,041 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-24 15:06:19,042 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-24 15:06:19,042 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2020-10-24 15:06:19,042 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt
[2020-10-24 15:06:19,042 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-24 15:06:19,043 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-24 15:06:19,043 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-10-24 15:06:19,043 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f
[2020-10-24 15:06:19,488 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-24 15:06:19,532 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-24 15:06:19,538 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-24 15:06:19,540 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-24 15:06:19,541 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-24 15:06:19,543 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c
[2020-10-24 15:06:19,624 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16137d2c3/2d1d87171d9249c788d187ab186da45f/FLAG60342c02b
[2020-10-24 15:06:20,245 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-24 15:06:20,246 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c
[2020-10-24 15:06:20,255 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16137d2c3/2d1d87171d9249c788d187ab186da45f/FLAG60342c02b
[2020-10-24 15:06:20,605 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16137d2c3/2d1d87171d9249c788d187ab186da45f
[2020-10-24 15:06:20,609 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-24 15:06:20,617 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2020-10-24 15:06:20,619 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-24 15:06:20,619 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-24 15:06:20,626 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-24 15:06:20,627 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:20,632 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec4af73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20, skipping insertion in model container
[2020-10-24 15:06:20,633 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:20,642 INFO  L146         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-24 15:06:20,665 INFO  L179         MainTranslator]: Built tables and reachable declarations
[2020-10-24 15:06:20,881 INFO  L211          PostProcessor]: Analyzing one entry point: main
[2020-10-24 15:06:20,898 INFO  L212         MainTranslator]: Completed pre-run
[2020-10-24 15:06:20,925 INFO  L211          PostProcessor]: Analyzing one entry point: main
[2020-10-24 15:06:20,950 INFO  L217         MainTranslator]: Completed translation
[2020-10-24 15:06:20,951 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20 WrapperNode
[2020-10-24 15:06:20,951 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-24 15:06:20,953 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-10-24 15:06:20,953 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-10-24 15:06:20,953 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2020-10-24 15:06:20,962 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:20,975 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,006 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-10-24 15:06:21,007 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-24 15:06:21,007 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-24 15:06:21,007 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-24 15:06:21,017 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,017 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,022 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,023 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,035 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,040 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,044 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
[2020-10-24 15:06:21,059 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-24 15:06:21,061 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-24 15:06:21,061 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-24 15:06:21,061 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-24 15:06:21,062 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-24 15:06:21,146 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE
[2020-10-24 15:06:21,147 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8
[2020-10-24 15:06:21,147 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2020-10-24 15:06:21,147 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-24 15:06:21,147 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2020-10-24 15:06:21,148 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-24 15:06:21,148 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-24 15:06:21,148 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-24 15:06:21,950 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-24 15:06:21,950 INFO  L298             CfgBuilder]: Removed 18 assume(true) statements.
[2020-10-24 15:06:21,952 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:21 BoogieIcfgContainer
[2020-10-24 15:06:21,952 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-24 15:06:21,954 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-24 15:06:21,954 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-24 15:06:21,958 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-24 15:06:21,958 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:06:20" (1/3) ...
[2020-10-24 15:06:21,959 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4300735f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:06:21, skipping insertion in model container
[2020-10-24 15:06:21,959 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:06:20" (2/3) ...
[2020-10-24 15:06:21,959 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4300735f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:06:21, skipping insertion in model container
[2020-10-24 15:06:21,960 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:21" (3/3) ...
[2020-10-24 15:06:21,961 INFO  L111   eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c
[2020-10-24 15:06:21,973 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-10-24 15:06:21,978 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-24 15:06:21,991 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-24 15:06:22,016 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-24 15:06:22,016 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-24 15:06:22,016 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-10-24 15:06:22,016 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-24 15:06:22,016 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-24 15:06:22,017 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-24 15:06:22,017 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-24 15:06:22,017 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-24 15:06:22,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states.
[2020-10-24 15:06:22,038 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-10-24 15:06:22,038 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:22,039 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:22,040 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:22,046 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:22,046 INFO  L82        PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times
[2020-10-24 15:06:22,060 INFO  L162   FreeRefinementEngine]: Executing refinement strategy WOLF
[2020-10-24 15:06:22,061 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087633352]
[2020-10-24 15:06:22,061 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat
Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3
[2020-10-24 15:06:23,051 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:23,155 INFO  L263         TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-10-24 15:06:23,161 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-10-24 15:06:23,180 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:23,180 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-10-24 15:06:23,185 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:23,186 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087633352]
[2020-10-24 15:06:23,187 INFO  L219   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:23,187 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2020-10-24 15:06:23,188 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602209200]
[2020-10-24 15:06:23,192 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-10-24 15:06:23,192 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2020-10-24 15:06:23,207 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-10-24 15:06:23,208 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-10-24 15:06:23,210 INFO  L87              Difference]: Start difference. First operand 31 states. Second operand 2 states.
[2020-10-24 15:06:23,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:23,232 INFO  L93              Difference]: Finished difference Result 57 states and 88 transitions.
[2020-10-24 15:06:23,232 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-10-24 15:06:23,234 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-10-24 15:06:23,234 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:23,245 INFO  L225             Difference]: With dead ends: 57
[2020-10-24 15:06:23,245 INFO  L226             Difference]: Without dead ends: 26
[2020-10-24 15:06:23,249 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-10-24 15:06:23,272 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-10-24 15:06:23,295 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2020-10-24 15:06:23,296 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-10-24 15:06:23,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions.
[2020-10-24 15:06:23,302 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11
[2020-10-24 15:06:23,303 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:23,303 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 36 transitions.
[2020-10-24 15:06:23,303 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-10-24 15:06:23,303 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions.
[2020-10-24 15:06:23,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-10-24 15:06:23,305 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:23,305 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:23,519 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3
[2020-10-24 15:06:23,521 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:23,522 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:23,523 INFO  L82        PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times
[2020-10-24 15:06:23,523 INFO  L162   FreeRefinementEngine]: Executing refinement strategy WOLF
[2020-10-24 15:06:23,524 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435931610]
[2020-10-24 15:06:23,524 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat
Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3
[2020-10-24 15:06:24,421 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-24 15:06:24,501 INFO  L263         TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-10-24 15:06:24,502 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-10-24 15:06:24,544 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:24,544 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-10-24 15:06:24,571 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-24 15:06:24,572 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435931610]
[2020-10-24 15:06:24,575 INFO  L219   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2020-10-24 15:06:24,576 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6
[2020-10-24 15:06:24,576 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110183550]
[2020-10-24 15:06:24,577 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-24 15:06:24,578 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2020-10-24 15:06:24,582 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-24 15:06:24,582 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-24 15:06:24,583 INFO  L87              Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states.
[2020-10-24 15:06:24,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-24 15:06:24,728 INFO  L93              Difference]: Finished difference Result 50 states and 63 transitions.
[2020-10-24 15:06:24,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-10-24 15:06:24,730 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 12
[2020-10-24 15:06:24,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-24 15:06:24,732 INFO  L225             Difference]: With dead ends: 50
[2020-10-24 15:06:24,732 INFO  L226             Difference]: Without dead ends: 46
[2020-10-24 15:06:24,733 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2020-10-24 15:06:24,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-10-24 15:06:24,747 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28.
[2020-10-24 15:06:24,747 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-24 15:06:24,749 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2020-10-24 15:06:24,751 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12
[2020-10-24 15:06:24,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-24 15:06:24,752 INFO  L481      AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2020-10-24 15:06:24,752 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-24 15:06:24,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2020-10-24 15:06:24,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-10-24 15:06:24,756 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-24 15:06:24,757 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-24 15:06:24,972 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3
[2020-10-24 15:06:24,973 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-24 15:06:24,974 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-24 15:06:24,974 INFO  L82        PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times
[2020-10-24 15:06:24,976 INFO  L162   FreeRefinementEngine]: Executing refinement strategy WOLF
[2020-10-24 15:06:24,976 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502411928]
[2020-10-24 15:06:24,976 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat
Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3
[2020-10-24 15:06:26,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-24 15:06:26,088 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-24 15:06:27,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-24 15:06:27,179 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-24 15:06:27,310 INFO  L173   FreeRefinementEngine]: Strategy WOLF found a feasible trace
[2020-10-24 15:06:27,310 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-10-24 15:06:27,511 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3
[2020-10-24 15:06:27,577 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 03:06:27 BoogieIcfgContainer
[2020-10-24 15:06:27,577 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-10-24 15:06:27,587 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2020-10-24 15:06:27,589 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2020-10-24 15:06:27,590 INFO  L275        PluginConnector]: Witness Printer initialized
[2020-10-24 15:06:27,591 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:06:21" (3/4) ...
[2020-10-24 15:06:27,595 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2020-10-24 15:06:27,661 INFO  L141         WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml
[2020-10-24 15:06:27,662 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2020-10-24 15:06:27,665 INFO  L168              Benchmark]: Toolchain (without parser) took 7052.60 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 24.1 MB in the beginning and 30.8 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,666 INFO  L168              Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 46.1 MB. Free memory was 26.7 MB in the beginning and 26.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,667 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 333.05 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 23.6 MB in the end (delta: -88.4 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,668 INFO  L168              Benchmark]: Boogie Procedure Inliner took 53.48 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 21.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,669 INFO  L168              Benchmark]: Boogie Preprocessor took 52.84 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 21.7 MB in the beginning and 43.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,670 INFO  L168              Benchmark]: RCFGBuilder took 891.65 ms. Allocated memory is still 58.7 MB. Free memory was 43.8 MB in the beginning and 37.8 MB in the end (delta: 6.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,670 INFO  L168              Benchmark]: TraceAbstraction took 5631.79 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 33.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,671 INFO  L168              Benchmark]: Witness Printer took 75.44 ms. Allocated memory is still 58.7 MB. Free memory was 33.3 MB in the beginning and 30.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2020-10-24 15:06:27,677 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.30 ms. Allocated memory is still 46.1 MB. Free memory was 26.7 MB in the beginning and 26.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB.
 * CACSL2BoogieTranslator took 333.05 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 23.6 MB in the end (delta: -88.4 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB.
 * Boogie Procedure Inliner took 53.48 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 21.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Boogie Preprocessor took 52.84 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 21.7 MB in the beginning and 43.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB.
 * RCFGBuilder took 891.65 ms. Allocated memory is still 58.7 MB. Free memory was 43.8 MB in the beginning and 37.8 MB in the end (delta: 6.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB.
 * TraceAbstraction took 5631.79 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 33.3 MB in the end (delta: 4.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB.
 * Witness Printer took 75.44 ms. Allocated memory is still 58.7 MB. Free memory was 33.3 MB in the beginning and 30.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L66]                  double x = __VERIFIER_nondet_double();
[L67]      EXPR        0.0
[L67]      EXPR        0.0
[L67]      EXPR        0.0 / 0.0
[L67]                  double y = 0.0 / 0.0;
[L18]                  return x != x;
[L74]      COND TRUE   !isnan_double(x)
[L29]                  __uint32_t msw, lsw;
[L32]                  ieee_double_shape_type ew_u;
[L33]                  ew_u.value = (x)
[L34]      EXPR        ew_u.parts.msw
[L34]                  (msw) = ew_u.parts.msw
[L35]      EXPR        ew_u.parts.lsw
[L35]                  (lsw) = ew_u.parts.lsw
[L38-L39]  COND FALSE  !((msw == 0x00000000 && lsw == 0x00000000) ||
      (msw == 0x80000000 && lsw == 0x00000000))
[L41-L42]  COND FALSE  !((msw >= 0x00100000 && msw <= 0x7fefffff) ||
           (msw >= 0x80100000 && msw <= 0xffefffff))
[L44-L45]  COND FALSE  !(( msw <= 0x000fffff) ||
           (msw >= 0x80000000 && msw <= 0x800fffff))
[L48-L49]  COND FALSE  !((msw == 0x7ff00000 && lsw == 0x00000000) ||
           (msw == 0xfff00000 && lsw == 0x00000000))
[L52]                  return 0;
[L57]      COND TRUE   __fpclassify_double(x) == 0
[L58]                  return y;
[L76]                  double res = fmax_double(x, y);
[L79]      COND TRUE   res != x
[L3]                   __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error")

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 100 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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!
Received shutdown request...