/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
[2020-07-20 10:44:46,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 10:44:46,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 10:44:46,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 10:44:46,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[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...