/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 13:05:36,923 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:05:36,926 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:05:36,944 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:05:36,945 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:05:36,947 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:05:36,948 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 13:05:36,958 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 13:05:36,963 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 13:05:36,966 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 13:05:36,967 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 13:05:36,969 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 13:05:36,969 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:05:36,971 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:05:36,973 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:05:36,974 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:05:36,976 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:05:36,977 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:05:36,978 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:05:36,983 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:05:36,987 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:05:36,991 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:05:36,993 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:05:36,994 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:05:36,996 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:05:36,997 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:05:36,997 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:05:36,999 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:05:37,000 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:05:37,001 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 13:05:37,001 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 13:05:37,002 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 13:05:37,003 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 13:05:37,004 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 13:05:37,005 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 13:05:37,005 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 13:05:37,006 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 13:05:37,006 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 13:05:37,006 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 13:05:37,007 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 13:05:37,008 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:05:37,009 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 13:05:37,047 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 13:05:37,047 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:05:37,048 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:05:37,049 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 13:05:37,049 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 13:05:37,049 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:05:37,049 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 13:05:37,049 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:05:37,050 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 13:05:37,051 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 13:05:37,051 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 13:05:37,051 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:05:37,052 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:05:37,053 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 13:05:37,053 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 13:05:37,053 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 13:05:37,053 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:05:37,053 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:05:37,054 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 13:05:37,055 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 13:05:37,323 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:05:37,336 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:05:37,339 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:05:37,340 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 13:05:37,341 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 13:05:37,342 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-20 13:05:37,412 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5f1796/8767cbee76034c44ab5ec8fd4ee959ec/FLAG840beb6e0
[2020-07-20 13:05:37,870 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 13:05:37,871 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-20 13:05:37,877 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5f1796/8767cbee76034c44ab5ec8fd4ee959ec/FLAG840beb6e0
[2020-07-20 13:05:38,255 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b5f1796/8767cbee76034c44ab5ec8fd4ee959ec
[2020-07-20 13:05:38,263 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:05:38,265 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:05:38,266 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:05:38,267 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:05:38,270 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:05:38,271 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,276 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241e4152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38, skipping insertion in model container
[2020-07-20 13:05:38,277 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,285 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 13:05:38,308 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:05:38,486 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:05:38,491 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 13:05:38,517 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:05:38,626 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 13:05:38,627 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38 WrapperNode
[2020-07-20 13:05:38,627 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:05:38,628 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:05:38,628 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:05:38,628 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:05:38,643 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,643 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,654 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,654 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,666 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,668 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,670 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
[2020-07-20 13:05:38,674 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:05:38,675 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:05:38,675 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:05:38,675 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:05:38,676 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (1/1) ...
No working directory specified, using /storage/repos/ultimate/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
[2020-07-20 13:05:38,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:05:38,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:05:38,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 13:05:38,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 13:05:38,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure sqrt_custom
[2020-07-20 13:05:38,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:05:38,741 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:05:38,741 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double
[2020-07-20 13:05:38,741 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure sqrt_custom
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-20 13:05:38,742 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:05:38,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:05:39,144 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:05:39,149 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 13:05:39,153 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:05:39 BoogieIcfgContainer
[2020-07-20 13:05:39,153 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:05:39,159 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:05:39,159 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:05:39,162 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:05:39,162 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:05:38" (1/3) ...
[2020-07-20 13:05:39,163 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaf3735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:05:39, skipping insertion in model container
[2020-07-20 13:05:39,164 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:05:38" (2/3) ...
[2020-07-20 13:05:39,164 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaf3735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:05:39, skipping insertion in model container
[2020-07-20 13:05:39,164 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:05:39" (3/3) ...
[2020-07-20 13:05:39,166 INFO  L109   eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c
[2020-07-20 13:05:39,176 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:05:39,182 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:05:39,195 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:05:39,218 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:05:39,218 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 13:05:39,218 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:05:39,218 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:05:39,219 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:05:39,219 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 13:05:39,219 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:05:39,219 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:05:39,239 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states.
[2020-07-20 13:05:39,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 13:05:39,246 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:05:39,247 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:05:39,247 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:05:39,252 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:05:39,252 INFO  L82        PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times
[2020-07-20 13:05:39,259 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:05:39,260 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268904676]
[2020-07-20 13:05:39,260 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:05:39,407 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:05:39,408 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:05:39,411 INFO  L263         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 13:05:39,418 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:05:39,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:05:39,443 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:05:39,444 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268904676]
[2020-07-20 13:05:39,445 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:05:39,445 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 13:05:39,446 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124858832]
[2020-07-20 13:05:39,451 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 13:05:39,452 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:05:39,466 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 13:05:39,467 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 13:05:39,469 INFO  L87              Difference]: Start difference. First operand 30 states. Second operand 2 states.
[2020-07-20 13:05:39,492 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:05:39,493 INFO  L93              Difference]: Finished difference Result 51 states and 55 transitions.
[2020-07-20 13:05:39,493 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 13:05:39,494 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 22
[2020-07-20 13:05:39,495 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:05:39,502 INFO  L225             Difference]: With dead ends: 51
[2020-07-20 13:05:39,502 INFO  L226             Difference]: Without dead ends: 23
[2020-07-20 13:05:39,505 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 13:05:39,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-07-20 13:05:39,540 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2020-07-20 13:05:39,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2020-07-20 13:05:39,542 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2020-07-20 13:05:39,544 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22
[2020-07-20 13:05:39,545 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:05:39,545 INFO  L479      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2020-07-20 13:05:39,545 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 13:05:39,545 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2020-07-20 13:05:39,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 13:05:39,547 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:05:39,547 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:05:39,762 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:05:39,762 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:05:39,763 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:05:39,764 INFO  L82        PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times
[2020-07-20 13:05:39,764 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:05:39,765 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057593294]
[2020-07-20 13:05:39,765 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:05:39,900 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:05:39,901 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:05:39,901 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:05:39,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:05:39,937 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:05:40,004 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:05:40,004 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:05:40,218 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:05:40,256 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:05:40 BoogieIcfgContainer
[2020-07-20 13:05:40,257 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:05:40,260 INFO  L168              Benchmark]: Toolchain (without parser) took 1994.30 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 103.7 MB in the beginning and 113.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,261 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,262 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 361.04 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 103.3 MB in the beginning and 183.3 MB in the end (delta: -80.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,263 INFO  L168              Benchmark]: Boogie Preprocessor took 46.69 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 180.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,264 INFO  L168              Benchmark]: RCFGBuilder took 478.13 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 162.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,265 INFO  L168              Benchmark]: TraceAbstraction took 1098.15 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 113.6 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB.
[2020-07-20 13:05:40,269 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 361.04 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 103.3 MB in the beginning and 183.3 MB in the end (delta: -80.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 46.69 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 180.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 478.13 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 162.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1098.15 ms. Allocated memory is still 204.5 MB. Free memory was 162.7 MB in the beginning and 113.6 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable
    Unable to prove that call of __VERIFIER_error() unreachable
 Reason: overapproximation of bitwiseOr at line 36, overapproximation of someUnaryDOUBLEoperation at line 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49, overapproximation of bitwiseAnd at line 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 63. 
Possible FailurePath: 
[L15]              double C0 =  1.414213538;
[L16]              double C1 =  0.229761391;
[L17]              double C2 =  1.296735525;
[L18]              double C3 = -0.901098370;
[L19]              double C4 =  0.493553400;
[L20]              double C5 = -0.118958666;
       VAL         [\old(C0)=3, \old(C1)=2, \old(C2)=5, \old(C3)=1, \old(C4)=0, \old(C5)=4, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000]
[L56]              double x,y;
[L58]              x = __VERIFIER_nondet_double()
[L59]  CALL        assume_abort_if_not(x >= 1. && x <= 1e10)
       VAL         [\old(cond)=1, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000]
[L10]  COND FALSE  !(!cond)
       VAL         [\old(cond)=1, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=1]
[L59]  RET         assume_abort_if_not(x >= 1. && x <= 1e10)
       VAL         [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, x=6]
[L61]  CALL, EXPR  sqrt_custom(x)
       VAL         [\old(a)=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000]
[L29]              union u x;
[L30]              double r;
[L31]              int exp;
[L33]              x.d = a
[L35]  EXPR        x.i[0]
[L35]              exp = (x.i[0] & 0x7FF00000) >> 20
[L36]  EXPR        x.i[0]
[L36]              x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000
[L37]  EXPR        x.d
[L37]              r = x.d * 0.5
[L39]              r = C1+C2+(C3+(C4+C5*r)*r)*r
       VAL         [\old(a)=6, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-2, x={2:0}]
[L41]  COND TRUE   exp % 2 == 0
[L42]              exp++
       VAL         [\old(a)=6, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, x={2:0}]
[L48]              x.i[0] = (exp/2 + 511) << 20
[L49]  EXPR        x.d
[L49]              r = r * x.d
[L51]              return r;
[L51]              return r;
       VAL         [\old(a)=6, \result=10, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, r=10]
[L61]  RET, EXPR   sqrt_custom(x)
       VAL         [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=10, x=6]
[L61]              y = sqrt_custom(x)
[L63]  CALL        __VERIFIER_assert(y >= 0. && y <= 1e6)
       VAL         [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000]
[L12]  COND TRUE   !(cond)
       VAL         [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0]
[L12]              __VERIFIER_error()
       VAL         [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 44 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...