/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 BIGGEST_EQUIVALENCE_CLASS --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
[2020-07-21 00:30:31,910 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 00:30:31,913 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 00:30:31,925 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 00:30:31,925 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 00:30:31,926 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 00:30:31,928 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 00:30:31,929 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 00:30:31,931 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 00:30:31,932 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-07-21 00:30:31,934 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 00:30:31,934 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 00:30:31,935 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 00:30:31,936 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 00:30:31,937 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 00:30:31,938 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 00:30:31,939 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 00:30:31,941 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 00:30:31,943 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 00:30:31,944 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 00:30:31,946 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 00:30:31,947 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 00:30:31,947 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 00:30:31,950 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 00:30:31,950 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 00:30:31,951 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 00:30:31,952 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 00:30:31,952 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 00:30:31,953 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 00:30:31,953 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-21 00:30:31,957 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 00:30:31,957 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-21 00:30:31,958 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 00:30:31,959 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 00:30:31,960 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
[2020-07-21 00:30:31,975 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 00:30:31,975 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 00:30:31,977 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 00:30:31,977 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 00:30:31,977 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 00:30:31,977 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 00:30:31,977 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 00:30:31,978 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 00:30:31,978 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 00:30:31,978 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 00:30:31,978 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 00:30:31,978 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 00:30:31,979 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 00:30:31,979 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 00:30:31,979 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 00:30:31,979 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 00:30:31,979 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 00:30:31,980 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 00:30:31,980 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 00:30:31,980 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 00:30:31,980 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 00:30:31,980 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 00:30:31,981 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 00:30:31,981 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 00:30:31,981 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 00:30:31,981 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 00:30:31,981 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:30:31,982 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 00:30:31,982 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 00:30:31,982 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 -> BIGGEST_EQUIVALENCE_CLASS
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
[2020-07-21 00:30:32,270 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 00:30:32,284 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 00:30:32,287 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 00:30:32,289 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 00:30:32,289 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 00:30:32,290 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-21 00:30:32,352 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b804ed337/251fa5faa7034a078186a1ad05d2fc17/FLAG9d3ddb9ce
[2020-07-21 00:30:32,814 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 00:30:32,815 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-21 00:30:32,823 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b804ed337/251fa5faa7034a078186a1ad05d2fc17/FLAG9d3ddb9ce
[2020-07-21 00:30:33,194 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b804ed337/251fa5faa7034a078186a1ad05d2fc17
[2020-07-21 00:30:33,202 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 00:30:33,206 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 00:30:33,207 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 00:30:33,207 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 00:30:33,210 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 00:30:33,211 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,214 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65136dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33, skipping insertion in model container
[2020-07-21 00:30:33,215 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,222 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 00:30:33,246 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 00:30:33,445 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:30:33,450 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 00:30:33,478 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:30:33,586 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 00:30:33,587 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33 WrapperNode
[2020-07-21 00:30:33,587 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 00:30:33,588 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 00:30:33,588 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 00:30:33,588 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 00:30:33,600 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,600 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,610 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,610 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,622 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,624 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,626 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (1/1) ...
[2020-07-21 00:30:33,629 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 00:30:33,629 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 00:30:33,629 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 00:30:33,629 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 00:30:33,631 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (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
[2020-07-21 00:30:33,690 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 00:30:33,690 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 00:30:33,691 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-21 00:30:33,691 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-21 00:30:33,691 INFO  L138     BoogieDeclarations]: Found implementation of procedure sqrt_custom
[2020-07-21 00:30:33,691 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 00:30:33,691 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 00:30:33,691 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure sqrt_custom
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-21 00:30:33,692 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 00:30:33,693 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 00:30:33,694 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 00:30:34,062 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 00:30:34,063 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-21 00:30:34,066 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:30:34 BoogieIcfgContainer
[2020-07-21 00:30:34,067 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 00:30:34,068 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 00:30:34,068 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 00:30:34,071 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 00:30:34,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:30:33" (1/3) ...
[2020-07-21 00:30:34,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43062c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:30:34, skipping insertion in model container
[2020-07-21 00:30:34,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:30:33" (2/3) ...
[2020-07-21 00:30:34,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43062c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:30:34, skipping insertion in model container
[2020-07-21 00:30:34,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:30:34" (3/3) ...
[2020-07-21 00:30:34,075 INFO  L109   eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c
[2020-07-21 00:30:34,086 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 00:30:34,093 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 00:30:34,107 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 00:30:34,132 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 00:30:34,132 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 00:30:34,133 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 00:30:34,133 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 00:30:34,133 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 00:30:34,133 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 00:30:34,133 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 00:30:34,133 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 00:30:34,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states.
[2020-07-21 00:30:34,159 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 00:30:34,159 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:30:34,160 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]
[2020-07-21 00:30:34,160 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:30:34,165 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:30:34,165 INFO  L82        PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times
[2020-07-21 00:30:34,174 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:30:34,174 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817872161]
[2020-07-21 00:30:34,175 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
[2020-07-21 00:30:34,303 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:30:34,303 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:30:34,306 INFO  L263         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-21 00:30:34,313 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:30:34,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:30:34,336 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:30:34,337 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817872161]
[2020-07-21 00:30:34,338 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:30:34,339 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-21 00:30:34,340 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080608144]
[2020-07-21 00:30:34,345 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-21 00:30:34,346 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:30:34,360 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-21 00:30:34,361 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 00:30:34,363 INFO  L87              Difference]: Start difference. First operand 30 states. Second operand 2 states.
[2020-07-21 00:30:34,388 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:30:34,388 INFO  L93              Difference]: Finished difference Result 51 states and 55 transitions.
[2020-07-21 00:30:34,389 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-21 00:30:34,390 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 22
[2020-07-21 00:30:34,391 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:30:34,400 INFO  L225             Difference]: With dead ends: 51
[2020-07-21 00:30:34,400 INFO  L226             Difference]: Without dead ends: 23
[2020-07-21 00:30:34,404 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
[2020-07-21 00:30:34,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-07-21 00:30:34,442 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2020-07-21 00:30:34,444 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2020-07-21 00:30:34,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2020-07-21 00:30:34,447 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22
[2020-07-21 00:30:34,448 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:30:34,448 INFO  L479      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2020-07-21 00:30:34,448 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-21 00:30:34,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2020-07-21 00:30:34,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 00:30:34,450 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 00:30:34,450 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]
[2020-07-21 00:30:34,664 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:30:34,665 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:30:34,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:30:34,666 INFO  L82        PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times
[2020-07-21 00:30:34,667 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:30:34,667 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484470537]
[2020-07-21 00:30:34,667 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
[2020-07-21 00:30:34,768 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:30:34,769 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 00:30:34,769 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:30:34,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 00:30:34,796 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 00:30:34,828 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 00:30:34,828 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 00:30:35,044 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:30:35,086 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:30:35 BoogieIcfgContainer
[2020-07-21 00:30:35,086 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 00:30:35,089 INFO  L168              Benchmark]: Toolchain (without parser) took 1883.70 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 103.7 MB in the beginning and 115.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,090 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,091 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 380.97 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 103.3 MB in the beginning and 181.8 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,092 INFO  L168              Benchmark]: Boogie Preprocessor took 40.85 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 180.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,093 INFO  L168              Benchmark]: RCFGBuilder took 437.64 ms. Allocated memory is still 203.4 MB. Free memory was 179.4 MB in the beginning and 161.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,094 INFO  L168              Benchmark]: TraceAbstraction took 1017.87 ms. Allocated memory is still 203.4 MB. Free memory was 161.8 MB in the beginning and 115.0 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB.
[2020-07-21 00:30:35,098 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 380.97 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 103.3 MB in the beginning and 181.8 MB in the end (delta: -78.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 40.85 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 180.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 437.64 ms. Allocated memory is still 203.4 MB. Free memory was 179.4 MB in the beginning and 161.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1017.87 ms. Allocated memory is still 203.4 MB. Free memory was 161.8 MB in the beginning and 115.0 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 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)=4, \old(C1)=2, \old(C2)=5, \old(C3)=1, \old(C4)=0, \old(C5)=3, 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=9, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, r=9]
[L61]  RET, EXPR   sqrt_custom(x)
       VAL         [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=9, 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: 0.9s, 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, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 83 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...