/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 NOT_INCREMENTALLY -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 10:44:46,118 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 10:44:46,121 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 10:44:46,137 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 10:44:46,137 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 10:44:46,139 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 10:44:46,141 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 10:44:46,150 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 10:44:46,154 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 10:44:46,157 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 10:44:46,158 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 10:44:46,159 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 10:44:46,160 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 10:44:46,161 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 10:44:46,163 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 10:44:46,164 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 10:44:46,165 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 10:44:46,167 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 10:44:46,168 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 10:44:46,172 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 10:44:46,177 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 10:44:46,180 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 10:44:46,181 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 10:44:46,182 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 10:44:46,185 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 10:44:46,185 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 10:44:46,185 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 10:44:46,188 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 10:44:46,188 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 10:44:46,189 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 10:44:46,189 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 10:44:46,190 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 10:44:46,191 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 10:44:46,191 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 10:44:46,192 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 10:44:46,193 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 10:44:46,193 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 10:44:46,195 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 10:44:46,196 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 10:44:46,233 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 10:44:46,233 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 10:44:46,234 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 10:44:46,237 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 10:44:46,238 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 10:44:46,238 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 10:44:46,238 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 10:44:46,238 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 10:44:46,238 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 10:44:46,239 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 10:44:46,240 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 10:44:46,240 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 10:44:46,240 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 10:44:46,240 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 10:44:46,240 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 10:44:46,241 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 10:44:46,241 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 10:44:46,241 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 10:44:46,243 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 10:44:46,244 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 -> NOT_INCREMENTALLY
[2020-07-20 10:44:46,525 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 10:44:46,538 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 10:44:46,541 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 10:44:46,542 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 10:44:46,543 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 10:44:46,543 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-20 10:44:46,601 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eecfb1019/be50eed07fd14177908e7baeaf4f393f/FLAGa538cae70
[2020-07-20 10:44:47,006 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 10:44:47,007 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c
[2020-07-20 10:44:47,013 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eecfb1019/be50eed07fd14177908e7baeaf4f393f/FLAGa538cae70
[2020-07-20 10:44:47,417 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eecfb1019/be50eed07fd14177908e7baeaf4f393f
[2020-07-20 10:44:47,425 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 10:44:47,428 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 10:44:47,429 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 10:44:47,429 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 10:44:47,432 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 10:44:47,433 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,436 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349a0f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47, skipping insertion in model container
[2020-07-20 10:44:47,436 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,443 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 10:44:47,461 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 10:44:47,647 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:44:47,652 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 10:44:47,679 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:44:47,797 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 10:44:47,797 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47 WrapperNode
[2020-07-20 10:44:47,797 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 10:44:47,798 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 10:44:47,798 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 10:44:47,798 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 10:44:47,808 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,808 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,817 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,817 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,828 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,830 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,831 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (1/1) ...
[2020-07-20 10:44:47,834 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 10:44:47,834 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 10:44:47,834 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 10:44:47,835 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 10:44:47,835 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (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 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure sqrt_custom
[2020-07-20 10:44:47,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 10:44:47,893 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 10:44:47,894 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double
[2020-07-20 10:44:47,894 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 10:44:47,895 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 10:44:47,895 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 10:44:47,895 INFO  L130     BoogieDeclarations]: Found specification of procedure sqrt_custom
[2020-07-20 10:44:47,895 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 10:44:47,895 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 10:44:47,896 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 10:44:47,897 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 10:44:48,222 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 10:44:48,223 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 10:44:48,226 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:48 BoogieIcfgContainer
[2020-07-20 10:44:48,226 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 10:44:48,227 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 10:44:48,227 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 10:44:48,230 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 10:44:48,231 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:44:47" (1/3) ...
[2020-07-20 10:44:48,231 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b1e345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:48, skipping insertion in model container
[2020-07-20 10:44:48,232 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:47" (2/3) ...
[2020-07-20 10:44:48,232 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b1e345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:48, skipping insertion in model container
[2020-07-20 10:44:48,232 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:48" (3/3) ...
[2020-07-20 10:44:48,234 INFO  L109   eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c
[2020-07-20 10:44:48,244 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 10:44:48,250 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 10:44:48,261 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 10:44:48,279 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 10:44:48,280 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 10:44:48,280 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 10:44:48,280 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 10:44:48,280 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 10:44:48,280 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 10:44:48,280 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 10:44:48,280 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 10:44:48,297 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states.
[2020-07-20 10:44:48,303 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 10:44:48,303 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:44:48,304 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 10:44:48,304 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:44:48,309 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:44:48,309 INFO  L82        PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times
[2020-07-20 10:44:48,317 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:44:48,318 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176829421]
[2020-07-20 10:44:48,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
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 10:44:48,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:44:48,429 INFO  L263         TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 10:44:48,436 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:44:48,458 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 10:44:48,459 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:44:48,460 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176829421]
[2020-07-20 10:44:48,460 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:44:48,461 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 10:44:48,462 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875716699]
[2020-07-20 10:44:48,467 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 10:44:48,467 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:44:48,480 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 10:44:48,481 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 10:44:48,483 INFO  L87              Difference]: Start difference. First operand 30 states. Second operand 2 states.
[2020-07-20 10:44:48,506 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:44:48,506 INFO  L93              Difference]: Finished difference Result 51 states and 55 transitions.
[2020-07-20 10:44:48,506 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 10:44:48,508 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 22
[2020-07-20 10:44:48,508 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:44:48,516 INFO  L225             Difference]: With dead ends: 51
[2020-07-20 10:44:48,517 INFO  L226             Difference]: Without dead ends: 23
[2020-07-20 10:44:48,520 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 10:44:48,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-07-20 10:44:48,554 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2020-07-20 10:44:48,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2020-07-20 10:44:48,557 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2020-07-20 10:44:48,558 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22
[2020-07-20 10:44:48,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:44:48,559 INFO  L479      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2020-07-20 10:44:48,559 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 10:44:48,559 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2020-07-20 10:44:48,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 10:44:48,560 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:44:48,561 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 10:44:48,775 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:44:48,775 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:44:48,776 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:44:48,777 INFO  L82        PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times
[2020-07-20 10:44:48,777 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:44:48,778 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656320465]
[2020-07-20 10:44:48,778 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
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 10:44:48,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 10:44:48,852 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 10:44:48,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 10:44:48,880 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 10:44:48,911 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 10:44:48,911 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 10:44:49,125 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:44:49,161 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:44:49 BoogieIcfgContainer
[2020-07-20 10:44:49,162 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 10:44:49,164 INFO  L168              Benchmark]: Toolchain (without parser) took 1736.48 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.8 MB in the beginning and 115.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,165 INFO  L168              Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,166 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 369.00 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 181.3 MB in the end (delta: -80.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,167 INFO  L168              Benchmark]: Boogie Preprocessor took 36.15 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,168 INFO  L168              Benchmark]: RCFGBuilder took 391.99 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 161.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,169 INFO  L168              Benchmark]: TraceAbstraction took 934.49 ms. Allocated memory is still 202.4 MB. Free memory was 160.7 MB in the beginning and 115.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB.
[2020-07-20 10:44:49,173 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.17 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 369.00 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 181.3 MB in the end (delta: -80.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 36.15 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 391.99 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 161.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 934.49 ms. Allocated memory is still 202.4 MB. Free memory was 160.7 MB in the beginning and 115.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 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)=5, \old(C1)=2, \old(C2)=4, \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=8, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, r=8]
[L61]  RET, EXPR   sqrt_custom(x)
       VAL         [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=8, 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: 0.8s, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 126 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...